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优化管理,以获得高产量和N的使用效率

Yu Zhou¹, Juan Huang², Zebi Li²

¹Institute of Characteristic Crops Research, Chongqing Academy of Agricultural Sciences, Yongchuan, 402160, Chongqing, China. xinganmermer@163.com.

Scientific reports

|August 22, 2024

概括

在 Sorghum 分配系统中有效的管理是高产量和环境保护的关键. 使用150公斤的N ha-1与 2:4:4分割比率优化谷物产量和使用效率 (NUE).

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:

在中国西南地区,子割是一种日益增长的种植实践,可以节省时间和劳动力.
有效的 (N) 肥料管理对于最大限度地提高的产量和最大限度地减少对环境的影响至关重要.

研究的目的:

为了研究不同率和分割比对谷物产量和使用效率 (NUE) 的影响.
在这个系统中确定最佳的N管理策略,以平衡高收益率和NUE.

主要方法:

进行了为期三年的实地实验,使用了两种果品种 (Jinyunuo3和Guojiaohong1).
应用了12种N速率 (75,150,225公斤Nha-1) 和分割比率的组合.
测量了关键的生长参数,谷物产量和各种使用效率 (RE<0xE2><0x82><0x99>,AE<0xE2><0x82><0x99>,PFP<0xE2><0x82><0x99>).

主要成果:

增加N率和分割应用改善了干物质,作物生长率 (CGR),叶面积指数 (LAI) 和光合作用潜力 (PP).
谷物产量随着N率的增加而增加,对于分期和年产量而言,150至225公斤N ha-1之间没有显著差异.
分开应用,特别是三分开,比单次应用提高了谷物产量; 分开应用以更高的N率实现了最佳的NUE.

结论:

建议在2:4:4的基底关节-头部比率下施加150公斤N ha-1以实现高效的N管理.
这一策略将高谷物产量与改善的使用效率同步在中国西南地区的系统中.

关键词:

谷物产量谷物产量谷物产量管理的管理.的使用效率效率.Sorghum 种植的时间.

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