优化化肥输入,利用休季降水量,为干地冬季小麦提供化肥
Shaobo Yu1, Yimin Qu2, Zhongdong Zhang3
1Department of Biology, Xinzhou Normal University, Xinzhou, 034000, Shanxi, China. imauyusb@163.com.
Scientific reports
|February 20, 2025
概括
在雨水农业中优化小麦的肥是最大限度地提高产量和用水效率 (WUE) 的关键. 根据休季降水量调整输入,可显著提高作物在变化的降雨环境中的表现.
科学领域:
- 农业科学 农业科学
- 农业学是一种农业学.
- 土壤科学 土壤科学
背景情况:
- 降水变化是洛斯高原雨水农业产量波动的主要驱动因素.
- 用 (N) 过度施肥带来了重大的经济和环境挑战.
- 优化与休季降水相关的管理对于提高作物用水效率 (WUE) 和干地农业系统的产量至关重要.
研究的目的:
- 根据历史降水数据,为小麦种植年种类建立参考范围.
- 确定最佳的 (N) 应用率,以在不同降水条件下最大限度地提高小麦产量和WUE.
- 为了研究降水频率 (PF) 和小麦产量在一个雨水系统之间的关系.
主要方法:
- 分析了37年的休季降水数据,以确定干旱,正常和潮湿的年份.
- 一个为期8年的实地实验,采用一个随机区块设计,具有7个N速率 (0240 kg N ha-1).
- 非线性回归分析以评估产量,降水频率和N输入之间的相关性.
主要成果:
- 定义的降水范围:干燥 (<220.7毫米),正常 (220.7346.2毫米) 和湿 (>346.2毫米).
- 最佳的N率因年种而异:150公斤1 (干),150180公斤1 (正常),和210公斤1 (湿).
- 通过优化N输入,通过增加每公峰数来最大限度地提高产量和WUE;PF对总降水比率的1%增加产生了46公斤ha-1更多.
结论:
- 根据季节性降雨变化调整化肥的应用对于提高小麦产量和 WUE 在雨水养殖系统中至关重要.
- 这项研究为优化干旱农业中的管理提供了一个框架,减轻了与降雨变化相关的风险.
- 了解"播种干旱"与"生长季干旱"的影响对于有效的N管理策略至关重要.
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