在可持续农业系统中,在不同的作物技术下覆盖作物产量,营养储存和释放
Aušra Arlauskienė1, Lina Šarūnaitė2
1Joniskelis Experimental Station, Lithuanian Research Centre for Agriculture and Forestry, 39301 Joniskelis, Lithuania.
Plants (Basel, Switzerland)
|August 26, 2023
概括
覆盖作物,如红三叶草和白,可以改善土壤的营养和生物质,特别是在有利的天气. 管理策略提高了对后续作物的有效性.
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:
- 收获后短暂的季节限制了覆盖作物 (CC) 的生长.
- 了解管理对CC的影响对于营养循环至关重要.
研究的目的:
- 澄清红三叶草 (RC) 和白 (WM) 管理对它们的生物质,营养含量 (N,P,K) 和营养释放的影响.
- 评估与主要作物 (春季大麦与冬季小麦) 和环境条件有关的CC绩效.
主要方法:
- 研究了种下RC和种后WM管理策略.
- 测量CC生物质产量,N,P和K积累.
- 分析了营养物质转移到随后的主要作物.
主要成果:
- WM生物量与8月份的降雨量和收获后的温度正相关.
- 春季大麦的CC生产率高于冬季小麦.
- 在温暖,雨天的条件下,地下播种的WM增加了34.1%的生物量.
- 吸 (+N) 应用促进了WM中的营养积累.
- 强化主要作物施肥对RC产量和营养积累产生了负面影响.
- CCs减少了土壤矿物的28.5-58.8%.
结论:
- 覆盖作物的生长和效率可以通过经过调查的管理实践和气象条件来提高.
- 营养素转移到主作物取决于CC生物质的N含量和C:N比率 (<20).
- 管理良好的覆盖作物可以显著降低土壤矿物的含量.
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