不同轮作模式农田钾养分表观平衡及其对土壤速效钾含量的影响
发布时间：2018-11-16 08:39
【摘要】：通过连续3年监测上海郊区43块定位农田,比较了50种作物以及5种不同轮作模式农田的钾养分表观盈余状况及其对土壤速效钾含量的影响。结果表明:(1)不同作物农田的钾养分盈余趋势为水生蔬菜类、果树类旱作蔬菜≥草皮大田作物;不同轮作模式农田钾养分盈余大小表现为作物轮作菜作轮作草皮单作菜菜轮作果树单作;(2)不同作物及轮作模式农田收获时土壤速效钾含量随土层的加深而逐渐增加,钾养分盈余多的农田土壤的表层速效钾含量也高;(3)不同作物及不同轮作模式农田钾养分盈余量与收获时土壤表层(0~30 cm)的速效钾含量呈正相关,但未达显著水平。
[Abstract]:The apparent surplus status of potassium and its effect on soil available potassium content in 50 crops and 5 different crop rotation models were compared by monitoring 43 plots of located farmland in Shanghai suburb for 3 years. The results showed that: (1) the trend of potassium surplus in different crop fields was aquatic vegetables, and fruit trees were dryland vegetables 鈮，
本文编号：2335040
[Abstract]:The apparent surplus status of potassium and its effect on soil available potassium content in 50 crops and 5 different crop rotation models were compared by monitoring 43 plots of located farmland in Shanghai suburb for 3 years. The results showed that: (1) the trend of potassium surplus in different crop fields was aquatic vegetables, and fruit trees were dryland vegetables 鈮，
本文编号：2335040
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