文献类型： 外文期刊

作者： Lu, Bo ¹ ; Li, Ziyu ¹ ; Yang, Fei ¹ ; Xu, Congshan ² ; Tang, Xinao ³ ; Zhang, Jianwei ¹ ; Ding, Chao ⁴ ; Xu, Deze ⁵ ; Zhu, Guofu ⁶ ; Zhang, Jing ⁷ ; Li, Weiwei ¹ ; Qian, Haoyu ¹ ; Jiang, Yu ¹ ; Liu, Zhenghui ¹ ; Ding, Yanfeng ¹ ; Li, Ganghua ¹ ;

作者机构： 1.Nanjing Agr Univ, Sanya Inst Nanjing Agr, Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Key Lab Crop Physiol Ecol & Prod Management, Sanya 572000, Peoples R China

2.Anhui Sci & Technol Promote Ctr, Hefei 230000, Peoples R China

3.China Kenya Belt & Rd Joint Lab Crop Mol Biol, Nanjing 210095, Peoples R China

4.Jiangsu Open Univ, Coll Rural Revitalizat, Nanjing 210095, Peoples R China

5.Hubei Acad Agr Sci, Inst Food Crops, Wuhan 430064, Peoples R China

6.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Hangzhou 310021, Peoples R China

7.Henan Agr Univ, Coll Agron, Zhengzhou 450046, Peoples R China

关键词： Sowing date; Nitrogen application rate; Grain yield; Climate resource; Indica hybrid rice

期刊名称：EUROPEAN JOURNAL OF AGRONOMY （ 影响因子：4.5； 五年影响因子：5.0 ）

ISSN： 1161-0301

年卷期： 2024 年 159 卷

页码：

收录情况： SCI

摘要： Rice yield variability can be attributed to the range of sowing dates across extensive cropping areas and varying nitrogen application rates. Nonetheless, the precise quantitative relationship between sowing dates, nitrogen application rates, and rice yield development remains elusive. In this study, we evaluated differences in dry matter and yield components of three indica hybrid varieties for five sowing dates at four ecological sites in the middle and lower reaches of the Yangtze River, China in 2019 and 2020, with three nitrogen application rates. Results indicated that yield initially increased and then decreased with delayed sowing dates. Photosynthetically active radiation accumulation after anthesis (PARAA) was identified as the key positive climate resource affecting rice yield, decreasing by an average of 19.7 MJ m(-2) for every 15-day delay in sowing. Nitrogen agronomic efficiency decreased linearly with the delay in sowing dates. Early sowing of rice with high PARAA and effective accumulated temperature after anthesis (EATAA) showed yield increases due to nitrogen application, whereas late-sown rice with insufficient photothermal resources did not exhibit marked yield improvement and may experience yield reduction. Ensuring adequate dry matter accumulation after anthesis and high seed setting rate was the main way to increase yield, influenced by sowing dates and nitrogen application rates. Intriguingly, our study revealed that nitrogen application markedly enhanced yield sensitivity to PARAA and EATAA. This finding underscores the pivotal role of nitrogen in modulating crop responsiveness to climate resources, and contributes to a deeper understanding of agronomic practices for optimizing yield under varying climatic conditions.