Pub Date : 2022-12-31DOI: 10.1080/09064710.2021.2007993
Chun Luo, Xianyong Wu
ABSTRACT In order to promote the integration of leisure agriculture and red cultural tourism, this paper improves the big data technology and combines the actual needs of tourism data fusion to construct an integrated analysis system of leisure agriculture and red cultural tourism-based big data. Through the data collection layer and the data information provided by the third party, this paper uses various technologies such as cloud computing and fuzzy recognition to classify and store massive amounts of data and information and establish a data warehouse to integrate various information resources to serve various smart applications. In addition, this paper combines the characteristics of leisure agriculture and red cultural tourism to integrate the two and builds an intelligent system with the support of big data technology. Finally, this paper carries out the performance verification of this system through experimental research. From the research results, it can be seen that the system constructed in this paper meets the needs of the integration of leisure agriculture and red cultural tourism.
{"title":"Research on the integrated development of leisure agriculture and red cultural tourism under the background of big data","authors":"Chun Luo, Xianyong Wu","doi":"10.1080/09064710.2021.2007993","DOIUrl":"https://doi.org/10.1080/09064710.2021.2007993","url":null,"abstract":"ABSTRACT In order to promote the integration of leisure agriculture and red cultural tourism, this paper improves the big data technology and combines the actual needs of tourism data fusion to construct an integrated analysis system of leisure agriculture and red cultural tourism-based big data. Through the data collection layer and the data information provided by the third party, this paper uses various technologies such as cloud computing and fuzzy recognition to classify and store massive amounts of data and information and establish a data warehouse to integrate various information resources to serve various smart applications. In addition, this paper combines the characteristics of leisure agriculture and red cultural tourism to integrate the two and builds an intelligent system with the support of big data technology. Finally, this paper carries out the performance verification of this system through experimental research. From the research results, it can be seen that the system constructed in this paper meets the needs of the integration of leisure agriculture and red cultural tourism.","PeriodicalId":7094,"journal":{"name":"Acta Agriculturae Scandinavica, Section B — Soil & Plant Science","volume":"1 1","pages":"189 - 199"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83432805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.1080/09064710.2021.2007994
Zhengwei Wan
ABSTRACT The quality and safety of agricultural products is not only related to the health of consumers, but also to the sustainable and stable development of the economy, and even to the harmony and stability of the society. The application of the theory model of multiple co-governance of agricultural product quality and safety has certain theoretical support. This paper applies big data technology to agricultural product quality and safety governance, and uses big data methods to study the key control points in the process of agricultural product traceability. Moreover, based on the selected key control points, this paper studies the key traceability indicators corresponding to the key control points of each link. In addition, this paper combines multi-disciplinary knowledge to carry out a systematic study on the legal issues of multivariate co-governance of agricultural product quality and safety in my country from the perspective of law. From the experimental research and the final decision-making suggestions, we can see that the method proposed in this paper is feasible.
{"title":"The application of big data in the legal improvement of agricultural product quality and safety governance","authors":"Zhengwei Wan","doi":"10.1080/09064710.2021.2007994","DOIUrl":"https://doi.org/10.1080/09064710.2021.2007994","url":null,"abstract":"ABSTRACT The quality and safety of agricultural products is not only related to the health of consumers, but also to the sustainable and stable development of the economy, and even to the harmony and stability of the society. The application of the theory model of multiple co-governance of agricultural product quality and safety has certain theoretical support. This paper applies big data technology to agricultural product quality and safety governance, and uses big data methods to study the key control points in the process of agricultural product traceability. Moreover, based on the selected key control points, this paper studies the key traceability indicators corresponding to the key control points of each link. In addition, this paper combines multi-disciplinary knowledge to carry out a systematic study on the legal issues of multivariate co-governance of agricultural product quality and safety in my country from the perspective of law. From the experimental research and the final decision-making suggestions, we can see that the method proposed in this paper is feasible.","PeriodicalId":7094,"journal":{"name":"Acta Agriculturae Scandinavica, Section B — Soil & Plant Science","volume":"47 1","pages":"200 - 213"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81139602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-15DOI: 10.1080/09064710.2022.2142657
Akinson Tumbure, J. Dera, T. C. Kunjeku, J. Nyamangara
ABSTRACT Organic agriculture in smallholder sub-Saharan African farming areas faces a lot of challenges that are different from those experienced in other regions of the world. While local farmers use organic resources in some way, the adoption of organic agriculture as a means of commercial production is lagging. Peer-reviewed literature on organic agriculture in Zimbabwe and most of Africa is limited. This review identifies regional situational differences in the farming environment in sub-Sahara Africa and Zimbabwe and discusses the opportunities and challenges peculiar to smallholder organic agriculture farmers. Results show that organic agriculture in Zimbabwean smallholder farming areas is mainly promoted by non-governmental organisations and supporting public policy is lacking. Local markets for organic produce are not well developed and an opportunity exists to develop local markets through supportive public policies, private sector engagement and further training and farmer support. While most soils present challenges to crop production due to nutrient deficiencies, yield increases are possible with organic management and research on mixing/fortifying organic amendments is needed.
{"title":"Contextualising smallholder organic agriculture in Zimbabwe and other sub-Saharan African countries: a review of challenges and opportunities","authors":"Akinson Tumbure, J. Dera, T. C. Kunjeku, J. Nyamangara","doi":"10.1080/09064710.2022.2142657","DOIUrl":"https://doi.org/10.1080/09064710.2022.2142657","url":null,"abstract":"ABSTRACT Organic agriculture in smallholder sub-Saharan African farming areas faces a lot of challenges that are different from those experienced in other regions of the world. While local farmers use organic resources in some way, the adoption of organic agriculture as a means of commercial production is lagging. Peer-reviewed literature on organic agriculture in Zimbabwe and most of Africa is limited. This review identifies regional situational differences in the farming environment in sub-Sahara Africa and Zimbabwe and discusses the opportunities and challenges peculiar to smallholder organic agriculture farmers. Results show that organic agriculture in Zimbabwean smallholder farming areas is mainly promoted by non-governmental organisations and supporting public policy is lacking. Local markets for organic produce are not well developed and an opportunity exists to develop local markets through supportive public policies, private sector engagement and further training and farmer support. While most soils present challenges to crop production due to nutrient deficiencies, yield increases are possible with organic management and research on mixing/fortifying organic amendments is needed.","PeriodicalId":7094,"journal":{"name":"Acta Agriculturae Scandinavica, Section B — Soil & Plant Science","volume":"31 1","pages":"1020 - 1035"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74895371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-28DOI: 10.1080/09064710.2022.2142658
Nigussie Yeneneh, E. Elias, G. Feyisa
ABSTRACT The aim of this research was to evaluate the status of selected soil chemical properties and to explore their spatial variability in various agroecosystems (AEs) of Choke Mountain, northwestern highlands of Ethiopia. A total of 74 geo-referenced composite surface (0-30 cm) soil samples were collected from representative farm lands. Soil chemical properties were analyzed following standard procedures. In addition, semi-variogram model was applied to estimate the spatial variability of soil properties. The results showed that soil chemical properties are below their threshold values in all agroecosystems and soil groups. The value of soil pH ranged from 4.3 to 6.8; Exchangeable acidity ranged from 0.124 to 0.180 cmol (+) kg−1; EC ranged from 0.02 to 0.19 dS m−1; OC ranged from 0.7 to 3.8%; TN ranged from 0.11 to 0.27%; Exchangeable potassium from 0.29 to 2.0 cmol (+) kg−1and CEC from 22 to 56 cmol (+)kg−1. The results also revealed that soil pH, exchangeable acidity, electrical conductivity, and exchangeable potassium showed strong spatial dependence whereas SOC and TN had moderate spatial dependence. The results indicated that soil quality is deteriorating. Hence, crop, soil and site-specific soil management strategies, primarily focusing on improving the content of SOM and addressing the problems of soil acidity are suggested to improve the soil conditions.
{"title":"Assessment of the spatial variability of selected soil chemical properties using geostatistical analysis in the north-western highlands of Ethiopia","authors":"Nigussie Yeneneh, E. Elias, G. Feyisa","doi":"10.1080/09064710.2022.2142658","DOIUrl":"https://doi.org/10.1080/09064710.2022.2142658","url":null,"abstract":"ABSTRACT The aim of this research was to evaluate the status of selected soil chemical properties and to explore their spatial variability in various agroecosystems (AEs) of Choke Mountain, northwestern highlands of Ethiopia. A total of 74 geo-referenced composite surface (0-30 cm) soil samples were collected from representative farm lands. Soil chemical properties were analyzed following standard procedures. In addition, semi-variogram model was applied to estimate the spatial variability of soil properties. The results showed that soil chemical properties are below their threshold values in all agroecosystems and soil groups. The value of soil pH ranged from 4.3 to 6.8; Exchangeable acidity ranged from 0.124 to 0.180 cmol (+) kg−1; EC ranged from 0.02 to 0.19 dS m−1; OC ranged from 0.7 to 3.8%; TN ranged from 0.11 to 0.27%; Exchangeable potassium from 0.29 to 2.0 cmol (+) kg−1and CEC from 22 to 56 cmol (+)kg−1. The results also revealed that soil pH, exchangeable acidity, electrical conductivity, and exchangeable potassium showed strong spatial dependence whereas SOC and TN had moderate spatial dependence. The results indicated that soil quality is deteriorating. Hence, crop, soil and site-specific soil management strategies, primarily focusing on improving the content of SOM and addressing the problems of soil acidity are suggested to improve the soil conditions.","PeriodicalId":7094,"journal":{"name":"Acta Agriculturae Scandinavica, Section B — Soil & Plant Science","volume":"63 1","pages":"1009 - 1019"},"PeriodicalIF":0.0,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91262067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-01DOI: 10.1080/09064710.2022.2138528
L. Norberg, H. Aronsson
ABSTRACT Phosphorus (P) losses from clay soils can be mitigated by introducing measures for improving soil structure. These include structure liming, where a mixture of CaO or Ca(OH)2 and CaCO3 is added to the soil. In a field experiment with separately tile-drained plots on a clay loam in Sweden, we examined the effects of structure liming on leaching of total-P, phosphate P (PO4-P) and total nitrogen (N) during three years after initial application. The treatments included two application rates (8 and 16 t ha−1) of a common product in comparison with a control (no lime). Effects of structure liming emerged during the second and third year after application, with 45 and 38% lower total-P leaching than in the unlimed control. A significant effect of the application rate was found in the third year. Nitrogen leaching and crop yield were not affected. As expected, soil pH raised following structure lime addition. Measurements of aggregate stability did not confirm the reduction in P leaching, indicating that it is important to measure P concentrations in drainage water directly when assessing the effect of structure liming.
摘要粘土中磷的流失可以通过改善土壤结构来缓解。其中包括结构石灰化，将CaO或Ca(OH)2和CaCO3的混合物添加到土壤中。在瑞典的一个粘土壤土上，我们在单独的瓦片排水地块上进行了田间试验，研究了初次施用后三年结构石灰对总磷、磷酸磷(PO4-P)和总氮(N)淋溶的影响。与对照(无石灰)相比，处理包括两种施用量(8和16 t / h - 1)的普通产品。施用后第2年和第3年，结构石灰的影响开始显现，总磷浸出量比未施用石灰的对照降低了45%和38%。在第三年发现了显著的应用率影响。氮淋溶和作物产量不受影响。正如预期的那样，添加结构石灰后土壤pH值升高。骨料稳定性的测量并没有证实P浸出的减少，这表明在评估结构石灰化的效果时，直接测量排水中的P浓度是重要的。
{"title":"Mitigating phosphorus leaching from a clay loam through structure liming","authors":"L. Norberg, H. Aronsson","doi":"10.1080/09064710.2022.2138528","DOIUrl":"https://doi.org/10.1080/09064710.2022.2138528","url":null,"abstract":"ABSTRACT Phosphorus (P) losses from clay soils can be mitigated by introducing measures for improving soil structure. These include structure liming, where a mixture of CaO or Ca(OH)2 and CaCO3 is added to the soil. In a field experiment with separately tile-drained plots on a clay loam in Sweden, we examined the effects of structure liming on leaching of total-P, phosphate P (PO4-P) and total nitrogen (N) during three years after initial application. The treatments included two application rates (8 and 16 t ha−1) of a common product in comparison with a control (no lime). Effects of structure liming emerged during the second and third year after application, with 45 and 38% lower total-P leaching than in the unlimed control. A significant effect of the application rate was found in the third year. Nitrogen leaching and crop yield were not affected. As expected, soil pH raised following structure lime addition. Measurements of aggregate stability did not confirm the reduction in P leaching, indicating that it is important to measure P concentrations in drainage water directly when assessing the effect of structure liming.","PeriodicalId":7094,"journal":{"name":"Acta Agriculturae Scandinavica, Section B — Soil & Plant Science","volume":"39 1","pages":"987 - 996"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85551455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-01DOI: 10.1080/09064710.2022.2138778
Tero Tommila, A. Kämäräinen, H. Kokko, P. Palonen
ABSTRACT Development of container cultivation methods for arctic bramble (Rubus arcticus L.) is currently underway. The aim of this study was to evaluate Sphagnum moss and two substrate mixes containing peat and coir or perlite as alternatives for a pure peat substrate in arctic bramble container cultivation, with particular interest on Sphagnum moss. The experiment was conducted in plastic high tunnel in plant towers with three planting levels (Top, Middle, Bottom). The substrates used were unfertilised peat (UP), an UP and perlite mix (80/20 by dry loose volume) (UPP), an UP and commercial coir mix (50/50) (UPCoir) and unfertilised Sphagnum moss (SM). Plant vigour was higher in SM compared to UP and UPP, while total fruit yield, mean fruit weight and individual drupelet weight were higher in SM compared to UPP. Both plant vigour and fruit yield were substantially reduced on Middle and especially Bottom level, compared to the Top level of plant towers. Water retention measurement of pure substrate materials showed higher air volume content in SM compared to UP or pure coir material. We conclude that Sphagnum moss is a highly promising substitute for peat as a substrate in arctic bramble container cultivation.
{"title":"Sphagnum moss is a promising growth substrate in arctic bramble container cultivation","authors":"Tero Tommila, A. Kämäräinen, H. Kokko, P. Palonen","doi":"10.1080/09064710.2022.2138778","DOIUrl":"https://doi.org/10.1080/09064710.2022.2138778","url":null,"abstract":"ABSTRACT Development of container cultivation methods for arctic bramble (Rubus arcticus L.) is currently underway. The aim of this study was to evaluate Sphagnum moss and two substrate mixes containing peat and coir or perlite as alternatives for a pure peat substrate in arctic bramble container cultivation, with particular interest on Sphagnum moss. The experiment was conducted in plastic high tunnel in plant towers with three planting levels (Top, Middle, Bottom). The substrates used were unfertilised peat (UP), an UP and perlite mix (80/20 by dry loose volume) (UPP), an UP and commercial coir mix (50/50) (UPCoir) and unfertilised Sphagnum moss (SM). Plant vigour was higher in SM compared to UP and UPP, while total fruit yield, mean fruit weight and individual drupelet weight were higher in SM compared to UPP. Both plant vigour and fruit yield were substantially reduced on Middle and especially Bottom level, compared to the Top level of plant towers. Water retention measurement of pure substrate materials showed higher air volume content in SM compared to UP or pure coir material. We conclude that Sphagnum moss is a highly promising substitute for peat as a substrate in arctic bramble container cultivation.","PeriodicalId":7094,"journal":{"name":"Acta Agriculturae Scandinavica, Section B — Soil & Plant Science","volume":"24 1","pages":"997 - 1008"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75306357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-01DOI: 10.1080/09064710.2022.2136107
Getachew Gudero Mengesha, H. Terefe, Abu Jambo Yae, Asnake Abera Arato, Merihun Gimja Betire, Tamirat Samuel Shago, Z. Bires, Biniyam Boraysho Borano, S. Abebe
ABSTRACT Ascochyta blight complex causes substantial yield losses and deteriorates seed quality of field pea worldwide. Field experiments were conducted to determine the effectiveness of an integrated approach consisting of host resistance and fungicides to reduce ascochyta blight progression and enhance yield performances of field pea for two seasons at Bonke and Chencha, Southern Ethiopia. Three field pea (Bursa, Burqitu and Tegegnech) varieties and three systemic (Carbonchlor, Matico and Othello-Top) fungicides, along with unsprayed controls, were arranged in a factorial randomised complete block design with three replications. Results showed that fungicide treated plots of each variety recorded the lowest progress rate, while control plots of Bursa, Burqitu and Tegegnech recorded the highest rate parameter (0.67, 0.60 and 0.451 units day−1), respectively at Bonke. Terminal mean severities were reduced by up to 24.6–43.7% and 20.1–43.7% due to fungicide applications over unsprayed plots at Chencha and Bonke, respectively. Moreover, triple applications of Othello-Top enhanced grain yield by 211% (Bursa), 204% (Burqitu) and 140% (Tegegnech) as compared to control plots at Bonke. A related pattern was noticed at Chencha areas. Economically, Burqitu with Othello-Top showed the highest net benefit and benefit–cost ratio of $2.35 × 103 ha−1 and 4.77 (Bonke) and 2.27 × 103 ha−1 and 3.76 (Chencha) in that order of presentation, followed by Matico, and found to be the most profitable management option due to monetary advantage; and it could be suggested for field pea growers.
{"title":"Integration of host resistance and fungicides reduced ascochyta blight pressure and minimised yield loss in field pea (Pisum sativum L.) in southern Ethiopia","authors":"Getachew Gudero Mengesha, H. Terefe, Abu Jambo Yae, Asnake Abera Arato, Merihun Gimja Betire, Tamirat Samuel Shago, Z. Bires, Biniyam Boraysho Borano, S. Abebe","doi":"10.1080/09064710.2022.2136107","DOIUrl":"https://doi.org/10.1080/09064710.2022.2136107","url":null,"abstract":"ABSTRACT Ascochyta blight complex causes substantial yield losses and deteriorates seed quality of field pea worldwide. Field experiments were conducted to determine the effectiveness of an integrated approach consisting of host resistance and fungicides to reduce ascochyta blight progression and enhance yield performances of field pea for two seasons at Bonke and Chencha, Southern Ethiopia. Three field pea (Bursa, Burqitu and Tegegnech) varieties and three systemic (Carbonchlor, Matico and Othello-Top) fungicides, along with unsprayed controls, were arranged in a factorial randomised complete block design with three replications. Results showed that fungicide treated plots of each variety recorded the lowest progress rate, while control plots of Bursa, Burqitu and Tegegnech recorded the highest rate parameter (0.67, 0.60 and 0.451 units day−1), respectively at Bonke. Terminal mean severities were reduced by up to 24.6–43.7% and 20.1–43.7% due to fungicide applications over unsprayed plots at Chencha and Bonke, respectively. Moreover, triple applications of Othello-Top enhanced grain yield by 211% (Bursa), 204% (Burqitu) and 140% (Tegegnech) as compared to control plots at Bonke. A related pattern was noticed at Chencha areas. Economically, Burqitu with Othello-Top showed the highest net benefit and benefit–cost ratio of $2.35 × 103 ha−1 and 4.77 (Bonke) and 2.27 × 103 ha−1 and 3.76 (Chencha) in that order of presentation, followed by Matico, and found to be the most profitable management option due to monetary advantage; and it could be suggested for field pea growers.","PeriodicalId":7094,"journal":{"name":"Acta Agriculturae Scandinavica, Section B — Soil & Plant Science","volume":"12 1","pages":"971 - 986"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74769428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-26DOI: 10.1080/09064710.2022.2136583
M. Tähtikarhu, T. Räsänen, J. Oksanen, J. Uusi-Kämppä
ABSTRACT Spatial information on the distribution of erosion areas and sediment transport pathways within agricultural landscapes is limited. Thus, we assess structural sediment connectivity via surface runoff by using a digital elevation model (2 × 2 m2) and RUSLE-based erosion estimates to compute index of connectivity (IC) and sediment delivery estimates. The variables were analyzed within and between two topographically contrasting subcatchments. We found greater spatial variability of IC within a subcatchment than between the subcatchments. The majority of field parcel areas (65%–97%) were structurally connected to adjacent open ditches and streams. Areas with high erosion estimates also tended to be structurally well-connected, both at the pixel (Pearson r = 0.58–0.63) and parcel scale (r = 0.49–0.67). The IC model was not highly sensitive to parameter variations. In contrast, the magnitude of sediment delivery estimates was highly sensitive to parameter variations. However, based on the high rank correlation (Spearman r s > 0.95) between computed sediment delivery estimates, the tool provided consistent information on potentially high sediment delivery areas. More empirical data and dynamic model applications could be applied to improve the accuracy of the estimates. The method provides a feasible tool to generate open data on connectivity.
农业景观中侵蚀区分布和泥沙运移路径的空间信息是有限的。因此，我们通过使用数字高程模型(2 × 2 m2)和基于rusle的侵蚀估计来计算连通性指数(IC)和沉积物输送估计，通过地表径流评估结构沉积物连通性。分析了两个地形差异较大的子集水区内部和之间的变量。我们发现，同一子集水区内IC的空间变异性大于子集水区之间的空间变异性。大部分地块(65%-97%)在结构上与相邻的明沟和溪流相连。在像元(Pearson r = 0.58-0.63)和地块尺度(r = 0.49-0.67)上，高侵蚀估算值的地区在结构上也往往连接良好。IC模型对参数变化的敏感性不高。相比之下，输沙量估算值对参数变化高度敏感。然而，基于计算出的输沙量估计值之间的高度相关性(Spearman r = 0.95)，该工具提供了潜在的高输沙量区域的一致信息。可以采用更多的经验数据和动态模型来提高估计的准确性。该方法为生成有关连通性的开放数据提供了一种可行的工具。
{"title":"Exploring structural sediment connectivity via surface runoff in agricultural lands of Finland","authors":"M. Tähtikarhu, T. Räsänen, J. Oksanen, J. Uusi-Kämppä","doi":"10.1080/09064710.2022.2136583","DOIUrl":"https://doi.org/10.1080/09064710.2022.2136583","url":null,"abstract":"ABSTRACT Spatial information on the distribution of erosion areas and sediment transport pathways within agricultural landscapes is limited. Thus, we assess structural sediment connectivity via surface runoff by using a digital elevation model (2 × 2 m2) and RUSLE-based erosion estimates to compute index of connectivity (IC) and sediment delivery estimates. The variables were analyzed within and between two topographically contrasting subcatchments. We found greater spatial variability of IC within a subcatchment than between the subcatchments. The majority of field parcel areas (65%–97%) were structurally connected to adjacent open ditches and streams. Areas with high erosion estimates also tended to be structurally well-connected, both at the pixel (Pearson r = 0.58–0.63) and parcel scale (r = 0.49–0.67). The IC model was not highly sensitive to parameter variations. In contrast, the magnitude of sediment delivery estimates was highly sensitive to parameter variations. However, based on the high rank correlation (Spearman r s > 0.95) between computed sediment delivery estimates, the tool provided consistent information on potentially high sediment delivery areas. More empirical data and dynamic model applications could be applied to improve the accuracy of the estimates. The method provides a feasible tool to generate open data on connectivity.","PeriodicalId":7094,"journal":{"name":"Acta Agriculturae Scandinavica, Section B — Soil & Plant Science","volume":"162 1","pages":"957 - 970"},"PeriodicalIF":0.0,"publicationDate":"2022-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76453629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-20DOI: 10.1080/09064710.2022.2134819
Deous Mary Ekyaligonza, Thaddeo Tibasiima Kahigwa, P. Dietrich, Bendicto Akoraebirungi, John Patrick Kanahe Kagorora, J. Friedel, A. Melcher, B. Freyer
ABSTRACT Integrating a combination of organic matter management (OMM) practices can increase soil fertility, biomass, and nutrient recycling, but evidence of this potential is limited. This study tested the impact of integrating a combination of OMM practices on soil fertility, biomass, and nutrient recycling on smallholder farms. Following a randomised complete block design, a four-season experiment was conducted in 2018-2019 on 10 farms. The treatments (T) included T1: cowpea-maize-bean-maize rotation; T2: cowpea-maize-bean-maize rotation + farmyard manure; T3: Faidherbia albida alleys + cowpea-maize-bean-maize rotation; T4: F. albida alleys + cowpea-maize-bean-maize rotation + farmyard manure; and T5 (control): maize monocrop with diammonium phosphate application at 50 kg/ha application rate. T1-T4 are the OMM practices. The maize in T2-T4 was undersown with Mucuna pruriens. Soil fertility parameters (i.e. pH, water holding capacity, nitrogen, phosphorus, and potassium), biomass, and nutrients in the biomass were determined. There were no differences in soil fertility parameters among all treatments (P > 0.05). From the second to the fourth season, biomass was consistently higher under T3 and T4 than in other treatments. Moreover, the nutrients in biomass were higher in T3 and T4 than in other treatments, an indicator that OMM practices with alley crops can increase nutrient recycling.
{"title":"Biomass contribution and nutrient recycling of organic matter management practices in tropical smallholder annual farming systems","authors":"Deous Mary Ekyaligonza, Thaddeo Tibasiima Kahigwa, P. Dietrich, Bendicto Akoraebirungi, John Patrick Kanahe Kagorora, J. Friedel, A. Melcher, B. Freyer","doi":"10.1080/09064710.2022.2134819","DOIUrl":"https://doi.org/10.1080/09064710.2022.2134819","url":null,"abstract":"ABSTRACT\u0000 Integrating a combination of organic matter management (OMM) practices can increase soil fertility, biomass, and nutrient recycling, but evidence of this potential is limited. This study tested the impact of integrating a combination of OMM practices on soil fertility, biomass, and nutrient recycling on smallholder farms. Following a randomised complete block design, a four-season experiment was conducted in 2018-2019 on 10 farms. The treatments (T) included T1: cowpea-maize-bean-maize rotation; T2: cowpea-maize-bean-maize rotation + farmyard manure; T3: Faidherbia albida alleys + cowpea-maize-bean-maize rotation; T4: F. albida alleys + cowpea-maize-bean-maize rotation + farmyard manure; and T5 (control): maize monocrop with diammonium phosphate application at 50 kg/ha application rate. T1-T4 are the OMM practices. The maize in T2-T4 was undersown with Mucuna pruriens. Soil fertility parameters (i.e. pH, water holding capacity, nitrogen, phosphorus, and potassium), biomass, and nutrients in the biomass were determined. There were no differences in soil fertility parameters among all treatments (P > 0.05). From the second to the fourth season, biomass was consistently higher under T3 and T4 than in other treatments. Moreover, the nutrients in biomass were higher in T3 and T4 than in other treatments, an indicator that OMM practices with alley crops can increase nutrient recycling.","PeriodicalId":7094,"journal":{"name":"Acta Agriculturae Scandinavica, Section B — Soil & Plant Science","volume":"333 1","pages":"945 - 956"},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77632259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-05DOI: 10.1080/09064710.2022.2125433
S. Lusiba, S. Maseko, J. Odhiambo, R. Adeleke
ABSTRACT Adding biochar to soil can alter soil properties and thus affect plant growth; however, the effect of biochar on biological nitrogen fixation, carbon accumulation and water-use efficiency of chickpea in tropical soils is not fully understood. Therefore, this study assessed the efficacy of biochar derived from poultry litter (denoted as PLB) and acacia (denoted as ACB) feedstocks on biological nitrogen fixation, carbon accumulation and water-use efficiency (δ13C) of chickpea grown in three contrasting soils of Fernwood (Arenosol) and Griffin (Helvic Acrisol) and Pinedene (Gleyic Acrisol). The biochars were applied at the rate of 0.5%, 1% and 2% (w/w) with control (0%) and replicated four times. Chickpeas grown in PLB treatments in Griffin and Pinedene soils investigated accumulated more N and C, for greater biomass production, resulting in an average total N-fixed of 77 and 52 mg N/plant, respectively. Nitrogen fixation and carbon accumulation of chickpea increased by the addition of 0.5% PLB and ACB in the Fernwood soil. The findings of this study demonstrate the potential of improving N inputs through biological nitrogen fixation with poultry litter biochar application in soils with varying nutrient status and texture, which is important in arid environments with limited N inputs.
{"title":"Biological N2 fixation, C accumulation and water-use efficiency (δ13C) of chickpea grown in three different soil types: response to the addition of biochar from poultry litter and acacia","authors":"S. Lusiba, S. Maseko, J. Odhiambo, R. Adeleke","doi":"10.1080/09064710.2022.2125433","DOIUrl":"https://doi.org/10.1080/09064710.2022.2125433","url":null,"abstract":"ABSTRACT Adding biochar to soil can alter soil properties and thus affect plant growth; however, the effect of biochar on biological nitrogen fixation, carbon accumulation and water-use efficiency of chickpea in tropical soils is not fully understood. Therefore, this study assessed the efficacy of biochar derived from poultry litter (denoted as PLB) and acacia (denoted as ACB) feedstocks on biological nitrogen fixation, carbon accumulation and water-use efficiency (δ13C) of chickpea grown in three contrasting soils of Fernwood (Arenosol) and Griffin (Helvic Acrisol) and Pinedene (Gleyic Acrisol). The biochars were applied at the rate of 0.5%, 1% and 2% (w/w) with control (0%) and replicated four times. Chickpeas grown in PLB treatments in Griffin and Pinedene soils investigated accumulated more N and C, for greater biomass production, resulting in an average total N-fixed of 77 and 52 mg N/plant, respectively. Nitrogen fixation and carbon accumulation of chickpea increased by the addition of 0.5% PLB and ACB in the Fernwood soil. The findings of this study demonstrate the potential of improving N inputs through biological nitrogen fixation with poultry litter biochar application in soils with varying nutrient status and texture, which is important in arid environments with limited N inputs.","PeriodicalId":7094,"journal":{"name":"Acta Agriculturae Scandinavica, Section B — Soil & Plant Science","volume":"15 1","pages":"931 - 944"},"PeriodicalIF":0.0,"publicationDate":"2022-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87769481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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