增加种植密度和减少N应用可提高产量和在双种米系统中在两个播种日期填充谷物
Wentao Zhou1, Lingling Yan2, Zhiqiang Fu1
1Key Laboratory of Crop Physiology and Molecular Biology Ministry of Education, College of Agronomy, Hunan Agricultural University, Changsha 410128, China.
Plants (Basel, Switzerland)
|June 28, 2023
概括
优化含量和种植密度在双作物大米中显著提高了谷物产量. N2D3策略 (减少10%的,增加40%的密度) 可以最大限度地提高产量并改善谷物填充.
科学领域:
- 农业科学 农业科学
- 农业学是一种农业学.
- 植物生理学作物生理学
背景情况:
- 谷物填充对大米产量至关重要.
- 减少气对产量有影响,但种植密度可以补偿.
- 了解这些相互作用是粮食安全的关键.
研究的目的:
- 研究减少和增加种植密度对大米产量和谷物填充的影响.
- 为了确定在不同的播种日期下双种大米的最佳管理策略.
主要方法:
- 实地试验使用了三个含量 (N1,N2,N3) 和三个种植密度 (D1,D2,D3).
- 评估的谷物产量,产量组成部分和谷物填充特征.
- 在两个播种日期 (S1,S2) 进行两年 (2019-2020) 的试验.
主要成果:
- 传统的播种日期 (S1) 的产量比较晚的日期 (S2) 高8.5-14%.
- 增加种植密度 (D3) 显著提高了产量 (6.2-19.4%),而减少 (N3) 则降低了产量 (2.8-7.6%).
- N2D3组合 (10%的N减少,40%的密度增加) 通过改进的板和尖的数量和优异的谷物填充,实现了最高的收益率 (8.7-23.8%的增加).
结论:
- 增加种植密度可以增加优质的谷物填充,而减少气则会减少.
- 在双作物大米中,N2D3策略是最大限度地提高产量和谷物填充的最佳策略.
- 这项研究为可持续的米生产提供了宝贵的见解.
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