Effects of Nitrogen Application Rate Under Straw Incorporation on Photosynthesis, Productivity and Nitrogen Use Efficiency in Winter Wheat.
Effects of Nitrogen Application Rate Under Straw Incorporation on Photosynthesis, Productivity and Nitrogen Use Efficiency in Winter Wheat.
复制标题
秸秆还田施氮量对冬小麦光合作用、生产力及氮素利用效率的影响
DOI：
10.3389/fpls.2022.862088
复制
发表时间：
2022
影响因子：
5.6
通讯作者：
Chen X
中科院分区：
文献类型：
--
作者：
Wang J;Hussain S;Sun X;Zhang P;Javed T;Dessoky ES;Ren X;Chen X
秸秆还田条件下的氮肥减量技术对提高半干旱地区小麦的肥料利用率和产量具有重要意义。为期两年的田间试验，有五种不同的氮肥施用量：控制（不施N，N 0），低N（75 kg ha-1，N75），中氮（150 kg ha-1，N150），高氮（225 kg ha-1，N225）和过量的N（300 kg ha-1，N300），以量化其对光合特性、氮利用的影响（从氮素积累、分配、运转和土壤硝态氮残留等方面）与冬小麦生产力的关系。施氮量对叶片光合特性及各器官氮素积累量有显著影响。与N300相比，N150和N225改善了光合特性，籽粒氮积累量分别增加5.55和10.97%，花后氮积累贡献率分别增加67.90和115.56%，残留氮分别减少62.50和46.48%，从而有效提高了氮素吸收效率和氮素贡献率。各施氮处理籽粒产量变化不大或基本不变。N 0和N75处理虽然减少了硝态氮的淋失，但仍使籽粒产量分别显著降低18.13%和28.37%。结果表明，秸秆还田条件下施氮量为150和225 kg/hm ~ 2时，小麦光合特性最好，氮素利用效率最高，产量最高。该研究为小麦生产技术提供了理论和实践指导。
Developing a nitrogen fertilizer (N) reduction method under straw incorporation is essentially important for increasing wheat productivity in terms of improved fertilizer use efficiency and high yield in semiarid areas. A two-year field experiment, with five different nitrogen application rates: control (without N application, N0), low N (75 kg ha–1, N75), medium N (150 kg ha–1, N150), high N (225 kg ha–1, N225) and excessive N (300 kg ha–1, N300), was conducted in 2018 and 2019 to quantify their impacts on the photosynthetic characteristics, nitrogen utilization (in terms of N accumulation, distribution and transportation, and residual soil NO3–-N) and productivity of winter wheat. There was a significant impact of N rates on photosynthetic traits, and N accumulation in different organs. As compared with the N300, N150, and N225 improved the photosynthetic characteristics, increased N accumulation in grains by 5.55 and 10.97%, the N contribution proportion of that accumulated after anthesis by 67.90 and 115.56%, and reduced residual N by 62.50 and 46.48%, respectively, thereby effectively improved N absorption efficiency and N contribution rates. Grain yield remained slightly or unchanged among N treatments. Although N0 and N75 treatments reduced the nitrate-N leaching but caused a significant reduction of 18.13 and 28.37%, respectively, in grain yield. From these results, we conclude that N application at 150 and 225 kg⋅ha–1 under straw incorporation was the most effective fertilization method in achieving the higher photosynthetic characteristics, improving NUE and grain yield. This study provides theoretical and practical guidance for wheat production techniques.
登录
查看更多内容
影响因子：
5.2
作者：
Latiri-Souki, K;Nortcliff, S;Lawlor, DW
通讯作者：
Lawlor, DW
长期掺入粪肥和化肥可减少雨养耕作系统中的总氮损失
影响因子：
4.6
作者：
Duan Y;Xu M;Gao S;Liu H;Huang S;Wang B
通讯作者：
Wang B
影响因子：
11.4
作者：
Garg, Shipra;Bahl, G. S.
通讯作者：
Bahl, G. S.
影响因子：
5.8
作者：
Hartmann, Tobias Edward;Yue, Shanchao;Mueller, Torsten
通讯作者：
Mueller, Torsten
影响因子：
5.6
作者：
Bhattarai, Dwarika;Abagandura, Gandura O.;Kumar, Sandeep
通讯作者：
Kumar, Sandeep