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化肥增强了土中晚种的冬季过冬,根系和料产量
Yuntao Wang1, Jihong Xie2, Fan Fan3
1School of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot, 010011, China.
Scientific reports
|August 5, 2024
概括
晚种草因根部发育不佳而难以过冬和收获. 化肥的应用显著改善了根特征,提高了晚种的冬季和料产量.
科学领域:
- 农业学是一种农业学.
- 植物科学 植物科学
- 土壤科学 土壤科学
背景情况:
- 阿尔法萨 (Medicago sativa L.) 的过冬和生产率受到播种日期和土壤肥沃度的关键影响.
- 关于晚种对 (P) 施肥的反应的知识有限.
- 在干旱,寒冷的地区优化的种植策略需要了解这些相互作用.
研究的目的:
- 调查延迟播种日期和不同 (P) 施加率对冬和产量的影响.
- 确定根特征和产量成分在调节播种日期和P受精的影响中的作用.
- 建立最佳的P受精策略,以提高晚种的表现.
主要方法:
- 在内蒙古进行了一项为期两年的实地研究,采用了分割图形设计.
- 主要地块:5个播种日期,从7月31日到9月1日.
- 部分图:五个P应用率 (0-130公斤P2O5每公-1);测量过冬率,根特征,料产量和产量组件.
主要成果:
- 延迟播种始终降低了过冬能力和料产量,主要是由于根特征减少和每面积植物数量减少.
- 肥的应用改善了冠状和尾根直径,提高了过冬率 (11.6-49%) 和加强根系.
- 肥还增加了每面积的芽 (9.4-31.3%) 和每芽的质量 (15.0-27.1%),可能弥补了晚播的产量损失.
结论:
- 对于类似于内蒙古的地区,建议在8月中旬之前播种.
- 应用70.6-85.9公斤的P2O5 ha-1可以显著提高晚播种的料产量和持久性.
- 将适当的晚播种与P肥料相结合,在干旱,寒冷的环境中,在短季作物后种植是一种有效的策略.
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