This study was conducted under water stress conditions for two years (2017-2018) to investigate the effects of different water stress levels on biomass yield, root yield, root/shoot ratio, some physiological characteristics, Water Use Efficiency (WUE), seasonal water consumption, and yield reduction ratio of silage sorghum. Experiments were conducted in randomized blocks design. There were four different irrigation treatments including I 1 : Full irrigation; I 2 : 75% of I 1 ; I 3 : 50% of I 1 , and I 4 : 25% of I 1 ).). In 2017, dry biomass yields varied between 14.11 (I 4 ) and 26.02 t ha -1 (I 1 ), stomatal conductance between 72.2 (I 4 ) and 147.8 mmol m -2 s -1 (I 1 ), chlorophyll contents between 37 spad (I 4 ) and 42.1 spad (I 1 ), canopy temperatures between 27.2 (I 1 ) and 31.3 o C (I 4 ), and WUE between 4.5 (I 1 ) and 5.5 kg m -3 (I 3 ). In 2018, dry biomass yields varied between 14.51 (I 4 ) and 25.92 t ha -1 (I 1 ), stomatal conductance between 69.9 (I 4 ) and 129.5 mmol m -2 s -1 (I 1 ), chlorophyll contents between 39.7 spad (I 4 ) and 43.9 spad (I 1 ), canopy temperatures between 30.0 (I 1 ) and 34.5 o C (I 4 ), and WUE between 4.2 (I 1 ) and 4.9 kg m -3 (I 4 ). Based on two-year averages, dry root yields varied between 8.15 (I 4 ) and 13.27 t ha -1 (I 1 ), root/shoot ratios between 0.51(I 1 ) and 0.57 % (I 3 -I 4 ), seasonal water consumptions between 281(I 4 ) and 598 mm (I 1 ). Water stress reduced biomass yield, root yield, stomatal conductance, and chlorophyll contents, and increased WUE and root/shoot ratios. Biomass yields decreased with increase in water stress, but this decrease was lower compared to the decrease in applied irrigation water quantities.
本试验在2017-2018年2年的水分胁迫条件下,研究了不同水分胁迫水平对青贮高粱生物量产量、根产量、根冠比、部分生理特性、水分利用效率(WUE)、季节耗水量和减产率的影响。实验采用随机分组设计。有四种不同的灌溉处理,包括I 1:完全灌溉;i2: i1的75%;i3: i1的50%,i4: i1的25%)。2017年干生物量产量在14.11 ~ 26.02 t ha -1 (I 1)之间变化,气孔导度在72.2 ~ 147.8 mmol m -2 s -1 (I 1)之间变化,叶绿素含量在37 spad (I 4) ~ 42.1 spad (I 1)之间变化,冠层温度在27.2 ~ 31.3℃(I 4)之间变化,WUE在4.5 ~ 5.5 kg m -3 (I 3)之间变化。2018年干生物量产量变化在14.51 ~ 25.92 t ha -1 (I 1)之间,气孔导度变化在69.9 ~ 129.5 mmol m -2 s -1 (I 1)之间,叶绿素含量变化在39.7 ~ 43.9 spad (I 1)之间,冠层温度变化在30.0 ~ 34.5℃(I 4)之间,WUE变化在4.2 ~ 4.9 kg m -3 (I 4)之间。2年平均干根产量在8.15 ~ 13.27 t ha -1 (I 1)之间变化,根冠比在0.51 ~ 0.57% (I 3 ~ I 4)之间变化,季节耗水量在281 ~ 598 mm (I 1)之间变化。水分胁迫降低了生物量产量、根系产量、气孔导度和叶绿素含量,提高了水分利用效率和根冠比。生物量产量随水分胁迫的增加而下降,但与施用灌溉水量的减少相比,这种下降幅度较小。
{"title":"Effects of Different Water Stress Levels on Biomass, Root Yield, and Some Physiological Parameters of Sorghum","authors":"E. Gonulal","doi":"10.52547/jast.24.6.1487","DOIUrl":"https://doi.org/10.52547/jast.24.6.1487","url":null,"abstract":"This study was conducted under water stress conditions for two years (2017-2018) to investigate the effects of different water stress levels on biomass yield, root yield, root/shoot ratio, some physiological characteristics, Water Use Efficiency (WUE), seasonal water consumption, and yield reduction ratio of silage sorghum. Experiments were conducted in randomized blocks design. There were four different irrigation treatments including I 1 : Full irrigation; I 2 : 75% of I 1 ; I 3 : 50% of I 1 , and I 4 : 25% of I 1 ).). In 2017, dry biomass yields varied between 14.11 (I 4 ) and 26.02 t ha -1 (I 1 ), stomatal conductance between 72.2 (I 4 ) and 147.8 mmol m -2 s -1 (I 1 ), chlorophyll contents between 37 spad (I 4 ) and 42.1 spad (I 1 ), canopy temperatures between 27.2 (I 1 ) and 31.3 o C (I 4 ), and WUE between 4.5 (I 1 ) and 5.5 kg m -3 (I 3 ). In 2018, dry biomass yields varied between 14.51 (I 4 ) and 25.92 t ha -1 (I 1 ), stomatal conductance between 69.9 (I 4 ) and 129.5 mmol m -2 s -1 (I 1 ), chlorophyll contents between 39.7 spad (I 4 ) and 43.9 spad (I 1 ), canopy temperatures between 30.0 (I 1 ) and 34.5 o C (I 4 ), and WUE between 4.2 (I 1 ) and 4.9 kg m -3 (I 4 ). Based on two-year averages, dry root yields varied between 8.15 (I 4 ) and 13.27 t ha -1 (I 1 ), root/shoot ratios between 0.51(I 1 ) and 0.57 % (I 3 -I 4 ), seasonal water consumptions between 281(I 4 ) and 598 mm (I 1 ). Water stress reduced biomass yield, root yield, stomatal conductance, and chlorophyll contents, and increased WUE and root/shoot ratios. Biomass yields decreased with increase in water stress, but this decrease was lower compared to the decrease in applied irrigation water quantities.","PeriodicalId":14931,"journal":{"name":"Journal of Agricultural Science and Technology","volume":"186 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80645089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Kumar Yadav, A. Radhakrishna, M. Mohan Das, Tejveer Singh, S. Yadav, Pankaj Sharma, A. Kumar Mishra, A. Sarker
Grass pea ( Lathyrus sativus L.) is an important dual-purpose crop in drought and famine prone areas as it is used as human food as well as livestock feed and fodder. However, the variation for forage quality traits of grass pea remains largely unexplored. This study aimed to characterize the genetic diversity of grass pea collections from Africa, Asia, and Europe, and identify genotypes for superior agronomic and forage nutritional quality traits. The principal component analysis revealed that the first three principal components from nutritional quality parameters viz ., NDF, ADF, cellulose, lignin and ash percent, and from agronomic traits viz ., plant height, nodes per plant, leaf area, green and dry biomass accounted for the majority of the total variation. In addition, a total of 59 polymorphic alleles were detected at 11 SSR loci with an average of 5.36 alleles per locus and the polymorphic information content ranged from 0.49 to 0.76. Three accessions (IF1872, IF2177 and IF2156) with higher biomass than the check and four accessions (IF1327, IF1312, IL-10-76 and IF1307) with excellent nutritive value in both green forage as well as straw were identified. The present study revealed high genetic variation for biomass and nutritional quality traits in grass pea collections that could be useful for development of high-yielding, nutritionally rich, and dual-purpose varieties.
{"title":"Deciphering Genetic Diversity in Grass Pea (Lathyrus sativus L.) Collections Using Agronomic and Forage \u0000Quality Traits and SSR Markers","authors":"V. Kumar Yadav, A. Radhakrishna, M. Mohan Das, Tejveer Singh, S. Yadav, Pankaj Sharma, A. Kumar Mishra, A. Sarker","doi":"10.52547/jast.24.6.1429","DOIUrl":"https://doi.org/10.52547/jast.24.6.1429","url":null,"abstract":"Grass pea ( Lathyrus sativus L.) is an important dual-purpose crop in drought and famine prone areas as it is used as human food as well as livestock feed and fodder. However, the variation for forage quality traits of grass pea remains largely unexplored. This study aimed to characterize the genetic diversity of grass pea collections from Africa, Asia, and Europe, and identify genotypes for superior agronomic and forage nutritional quality traits. The principal component analysis revealed that the first three principal components from nutritional quality parameters viz ., NDF, ADF, cellulose, lignin and ash percent, and from agronomic traits viz ., plant height, nodes per plant, leaf area, green and dry biomass accounted for the majority of the total variation. In addition, a total of 59 polymorphic alleles were detected at 11 SSR loci with an average of 5.36 alleles per locus and the polymorphic information content ranged from 0.49 to 0.76. Three accessions (IF1872, IF2177 and IF2156) with higher biomass than the check and four accessions (IF1327, IF1312, IL-10-76 and IF1307) with excellent nutritive value in both green forage as well as straw were identified. The present study revealed high genetic variation for biomass and nutritional quality traits in grass pea collections that could be useful for development of high-yielding, nutritionally rich, and dual-purpose varieties.","PeriodicalId":14931,"journal":{"name":"Journal of Agricultural Science and Technology","volume":"81 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83888879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}