Pub Date : 2022-04-01DOI: 10.3724/sp.j.1006.2022.11033
Xin-Ge Li, Yang Gao, Xiaojun Liu, Yongchao Tian, Yan Zhu, W. Cao, Q. Cao
: To clarify the effects of sowing dates, sowing rates, and nitrogen rates on growth and spectral indices in winter wheat, a two-year winter wheat field experiment under different sowing dates, sowing rates, and nitrogen rates was conducted. We studied systematically the effects of three factors and their interactions on yield, leaf area index (LAI), and normalized difference red edge (NDRE) of winter wheat at critical growth stages. Furthermore, to facilitate real-time monitoring of winter wheat growth dynamics, we also established the appropriate time-series curves of winter wheat canopy NDRE under different yield levels. The results indicated that the change patterns of NDRE and LAI at critical growth stages were very consistent, and the response of three factors to the two indices at critical growth stages was basically the same in winter wheat. In 2018 and 2019, the yield, LAI, and NDRE of winter wheat at each growth stages decreased with the delay of sowing date. In 2019 and 2020, the yield, peaks of LAI and NDRE under late sowing date were the largest except for the filling stage. The LAI and NDRE of winter wheat at different growth stages in the two years increased with the increase of nitrogen rates. However, there was basically no significant difference among sowing rates. Among the three factors, the sowing dates and nitrogen rates had a significant influence on the time-series curves of winter wheat canopy NDRE. The NDRE time series curves of winter wheat were stretched with the increase of nitrogen rates, the descending part of NDRE time series curve shifted to the left with the delay of the sowing date. In 2018 and 2019, the peak values of NDRE time series curves of winter wheat were declined with the delay of the sowing date. In 2019 and 2020, the peak values of the NDRE time series curves of late sowing and over-late sowing winter wheat were higher than that of suitable sowing wheat. The data of two years were merged to establish suitable time-series curves of winter wheat canopy NDRE under three yield levels, and the yield levels were less than 6.75 t hm –2 , 6.75–8.25 t hm –2 , and higher than 8.25 t hm –2 , respectively. The peak values and width of the NDRE time-series curves increased with the increase of yield level. In summary, winter wheat should be sown early at an appropriate date, but if the accumulated temperature before winter was higher, the sowing date should be postponed appropriately. And the growth of late sowing winter wheat could be improved by increasing a certain amount of sowing rates and nitrogen rates. At the same time, these results could provide a technical support for monitoring the growth of winter wheat under different sowing dates and different yield levels.
：为了阐明播种日期、播种率和施氮量对冬小麦生长和光谱指数的影响，在不同播种日期、不同播种率和不同施氮量下进行了为期两年的冬小麦田间试验。系统研究了三个因素及其相互作用对冬小麦关键生长期产量、叶面积指数（LAI）和归一化差异红边（NDRE）的影响。此外，为了便于实时监测冬小麦生长动态，我们还建立了不同产量水平下冬小麦冠层NDRE的适当时间序列曲线。结果表明，冬小麦关键生长期NDRE和LAI的变化规律非常一致，三个因子对关键生长期两个指标的响应基本一致。2018年和2019年，冬小麦各生育期的产量、LAI和NDRE随着播种期的推迟而下降。2019年和2020年，除灌浆期外，晚播期的产量、LAI和NDRE峰值最大。冬小麦不同生育期的LAI和NDRE在两年内随施氮量的增加而增加。然而，播种率之间基本上没有显著差异。在这三个因素中，播种期和施氮量对冬小麦冠层NDRE的时间序列曲线有显著影响。冬小麦NDRE时间序列曲线随着施氮量的增加而拉伸，NDRE时间曲线的下降部分随着播种期的推迟而向左移动。2018年和2019年，冬小麦NDRE时间序列曲线的峰值随着播种期的推迟而下降。2019年和2020年，晚播和超晚播冬小麦的NDRE时间序列曲线峰值均高于适播小麦。将两年的数据合并，建立了三个产量水平下冬小麦冠层NDRE的合适时间序列曲线，产量水平分别低于6.75 t hm–2、6.75–8.25 t hm-2和高于8.25 t hm2。NDRE时间序列曲线的峰值和宽度随着产量水平的增加而增加。总之，冬小麦应在适当的日期提前播种，但如果冬前的积温较高，则应适当推迟播种日期。提高一定的播种量和施氮量可以改善晚播冬小麦的生长。同时，这些结果可以为冬小麦在不同播期、不同产量水平下的生长监测提供技术支持。
{"title":"Effects of sowing dates, sowing rates, and nitrogen rates on growth and spectral indices in winter wheat","authors":"Xin-Ge Li, Yang Gao, Xiaojun Liu, Yongchao Tian, Yan Zhu, W. Cao, Q. Cao","doi":"10.3724/sp.j.1006.2022.11033","DOIUrl":"https://doi.org/10.3724/sp.j.1006.2022.11033","url":null,"abstract":": To clarify the effects of sowing dates, sowing rates, and nitrogen rates on growth and spectral indices in winter wheat, a two-year winter wheat field experiment under different sowing dates, sowing rates, and nitrogen rates was conducted. We studied systematically the effects of three factors and their interactions on yield, leaf area index (LAI), and normalized difference red edge (NDRE) of winter wheat at critical growth stages. Furthermore, to facilitate real-time monitoring of winter wheat growth dynamics, we also established the appropriate time-series curves of winter wheat canopy NDRE under different yield levels. The results indicated that the change patterns of NDRE and LAI at critical growth stages were very consistent, and the response of three factors to the two indices at critical growth stages was basically the same in winter wheat. In 2018 and 2019, the yield, LAI, and NDRE of winter wheat at each growth stages decreased with the delay of sowing date. In 2019 and 2020, the yield, peaks of LAI and NDRE under late sowing date were the largest except for the filling stage. The LAI and NDRE of winter wheat at different growth stages in the two years increased with the increase of nitrogen rates. However, there was basically no significant difference among sowing rates. Among the three factors, the sowing dates and nitrogen rates had a significant influence on the time-series curves of winter wheat canopy NDRE. The NDRE time series curves of winter wheat were stretched with the increase of nitrogen rates, the descending part of NDRE time series curve shifted to the left with the delay of the sowing date. In 2018 and 2019, the peak values of NDRE time series curves of winter wheat were declined with the delay of the sowing date. In 2019 and 2020, the peak values of the NDRE time series curves of late sowing and over-late sowing winter wheat were higher than that of suitable sowing wheat. The data of two years were merged to establish suitable time-series curves of winter wheat canopy NDRE under three yield levels, and the yield levels were less than 6.75 t hm –2 , 6.75–8.25 t hm –2 , and higher than 8.25 t hm –2 , respectively. The peak values and width of the NDRE time-series curves increased with the increase of yield level. In summary, winter wheat should be sown early at an appropriate date, but if the accumulated temperature before winter was higher, the sowing date should be postponed appropriately. And the growth of late sowing winter wheat could be improved by increasing a certain amount of sowing rates and nitrogen rates. At the same time, these results could provide a technical support for monitoring the growth of winter wheat under different sowing dates and different yield levels.","PeriodicalId":52132,"journal":{"name":"Acta Agronomica Sinica(China)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45246343","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 : 2022-04-01DOI: 10.3724/sp.j.1006.2022.14076
Xin Xu, Chao Qin, T. Zhao, Bin Liu, Hong-Yu Li, Jun Liu
: Soybean is a typical short-day crop. Photoperiod sensitivity seriously affects flowering time, yield, and planting range of soybean, but the mechanism underlying photoperiod and circadian rhythm regulation is still unclear. In Arabidopsis thaliana , ELF3, together with ELF4 and LUX, forms the ELF4-ELF3-LUX complex (Evening Complex, EC), which plays an important role in circadian rhythm and flowering time regulation. In this study, soybean mutants of Gmelf3a/j , Gmelf3b-1 , and Gmelf3b-2 were obtained by CRISPR/Cas9 gene editing system. We found that GmELF3b-1 regulated the flowering time in soybean under long-day conditions by observing flowering phenotypes in these mutants. The phenotypes of heterozygous double mutants re-vealed that there was functional redundancy among GmELF3a/J, GmELF3b-1 , and GmELF3b-2 in regulating flowering time of soybean. Through detecting the expression of circadian related genes in soybean by using qRT-PCR, it was found that the relative expression patterns of GmCAB , GmPRR9a , and GmPRR7a were changed in soybean. In summary, these results suggested that GmELF3a/J, GmELF3b-1, and GmELF3b-2 may regulate the circadian rhythm and flowering time through GmPRR9a and GmPRR7a in soybean.
{"title":"Function analysis of GmELF3s in regulating soybean flowering time and circadian rhythm","authors":"Xin Xu, Chao Qin, T. Zhao, Bin Liu, Hong-Yu Li, Jun Liu","doi":"10.3724/sp.j.1006.2022.14076","DOIUrl":"https://doi.org/10.3724/sp.j.1006.2022.14076","url":null,"abstract":": Soybean is a typical short-day crop. Photoperiod sensitivity seriously affects flowering time, yield, and planting range of soybean, but the mechanism underlying photoperiod and circadian rhythm regulation is still unclear. In Arabidopsis thaliana , ELF3, together with ELF4 and LUX, forms the ELF4-ELF3-LUX complex (Evening Complex, EC), which plays an important role in circadian rhythm and flowering time regulation. In this study, soybean mutants of Gmelf3a/j , Gmelf3b-1 , and Gmelf3b-2 were obtained by CRISPR/Cas9 gene editing system. We found that GmELF3b-1 regulated the flowering time in soybean under long-day conditions by observing flowering phenotypes in these mutants. The phenotypes of heterozygous double mutants re-vealed that there was functional redundancy among GmELF3a/J, GmELF3b-1 , and GmELF3b-2 in regulating flowering time of soybean. Through detecting the expression of circadian related genes in soybean by using qRT-PCR, it was found that the relative expression patterns of GmCAB , GmPRR9a , and GmPRR7a were changed in soybean. In summary, these results suggested that GmELF3a/J, GmELF3b-1, and GmELF3b-2 may regulate the circadian rhythm and flowering time through GmPRR9a and GmPRR7a in soybean.","PeriodicalId":52132,"journal":{"name":"Acta Agronomica Sinica(China)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47014825","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 : 2022-04-01DOI: 10.3724/sp.j.1006.2022.14034
Xiao-Hong Chen, Yuan Lin, Qianqian Wang, Min Ding, Haigang Wang, Ling Chen, Zhi-Jun Gao, Rui-Yun Wang, Z. Qiao
{"title":"Development of DNA molecular ID card in hog millet germplasm based on high motif SSR","authors":"Xiao-Hong Chen, Yuan Lin, Qianqian Wang, Min Ding, Haigang Wang, Ling Chen, Zhi-Jun Gao, Rui-Yun Wang, Z. Qiao","doi":"10.3724/sp.j.1006.2022.14034","DOIUrl":"https://doi.org/10.3724/sp.j.1006.2022.14034","url":null,"abstract":"","PeriodicalId":52132,"journal":{"name":"Acta Agronomica Sinica(China)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43403596","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 : 2022-03-01DOI: 10.3724/sp.j.1006.2022.14011
Haomian Du, Yu-Han Cheng, Tai Li, Zhihong Hou, Yong-Li Li, Haiyang Nan, Lidong Dong, Baoquan Liu, Qun Cheng
{"title":"Improving seed number per pod of soybean by molecular breeding based on <italic>Ln</italic> locus","authors":"Haomian Du, Yu-Han Cheng, Tai Li, Zhihong Hou, Yong-Li Li, Haiyang Nan, Lidong Dong, Baoquan Liu, Qun Cheng","doi":"10.3724/sp.j.1006.2022.14011","DOIUrl":"https://doi.org/10.3724/sp.j.1006.2022.14011","url":null,"abstract":"","PeriodicalId":52132,"journal":{"name":"Acta Agronomica Sinica(China)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47742687","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 : 2022-03-01DOI: 10.3724/sp.j.1006.2022.14038
H. Ding, Yang Xu, Guanchu Zhang, F. Qin, L. Dai, Zhimeng Zhang
{"title":"Effects of drought at different growth stages and nitrogen application on nitrogen absorption and utilization in peanut","authors":"H. Ding, Yang Xu, Guanchu Zhang, F. Qin, L. Dai, Zhimeng Zhang","doi":"10.3724/sp.j.1006.2022.14038","DOIUrl":"https://doi.org/10.3724/sp.j.1006.2022.14038","url":null,"abstract":"","PeriodicalId":52132,"journal":{"name":"Acta Agronomica Sinica(China)","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42140536","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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