發(fā)布時(shí)間：2018-11-16 08:39

【摘要】：通過(guò)連續(xù)3年監(jiān)測(cè)上海郊區(qū)43塊定位農(nóng)田,比較了50種作物以及5種不同輪作模式農(nóng)田的鉀養(yǎng)分表觀盈余狀況及其對(duì)土壤速效鉀含量的影響。結(jié)果表明:(1)不同作物農(nóng)田的鉀養(yǎng)分盈余趨勢(shì)為水生蔬菜類、果樹類旱作蔬菜≥草皮大田作物;不同輪作模式農(nóng)田鉀養(yǎng)分盈余大小表現(xiàn)為作物輪作菜作輪作草皮單作菜菜輪作果樹單作;(2)不同作物及輪作模式農(nóng)田收獲時(shí)土壤速效鉀含量隨土層的加深而逐漸增加,鉀養(yǎng)分盈余多的農(nóng)田土壤的表層速效鉀含量也高;(3)不同作物及不同輪作模式農(nóng)田鉀養(yǎng)分盈余量與收獲時(shí)土壤表層(0~30 cm)的速效鉀含量呈正相關(guān),但未達(dá)顯著水平。
[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，

本文編號(hào)：2335040