长期灌溉施肥对半干旱区褐土氮、磷和钾库的影响Ⅱ.对褐土农田土壤钾库的影响  

Effect of long-term irrigation and fertilization on nitrogen,phosphorous,and potassium pools of cinnamon soil in semi-arid area Ⅱ.Effect on potassium pool of cinnamon soil farmland

作　　者：郑昭佩[1] 宋德香[2] 刘作新[1] 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳110016 [2]山东师范大学人口.资源与环境学院,济南250014

出　　处：《生态学杂志》2004年第5期13-18,共6页Chinese Journal of Ecology

基　　金：辽宁省'十五'科技攻关重中之重 ( 2 0 0 12 10 0 1);国家'863'计划节水农业重大专项 ( 2 0 0 2AA2Z43 2 1)资助项目

摘　　要：采用二次通用旋转组合设计 ,在辽西半干旱区褐土上进行了长期田间试验 ,研究不同的灌水、施氮、施磷和施秸秆水平对土壤钾含量的影响。结果表明 ,土壤全钾含量随着氮、磷和秸秆施用量的增加而增加 ,随着灌水量的增加而降低 ,其中 ,施磷对土壤全钾含量的增加效果最明显 ,其次是施秸秆量。土壤速效钾含量随着灌水和氮、磷施用量的增加而降低 ,随着秸秆施用量的增加而增加 ,其中 ,施秸秆对土壤的速效钾含量影响最明显 ,其次是施用磷肥的影响。另外 ,施肥和灌水在提高土壤全钾含量的同时可能使速效钾含量降低 ,两者的变化表现为一定的负相关。With quadratic regression general rotation design,a long-term field trial was carried out in the semi-arid area of western Liaoning,to study the effects of irrigation and fertilization on soil nitrogen pool.The results showed that the contents of soil total nitrogen and hydrolyzable nitrogen can be reduced by irrigation.Soil nitrogen content was increased by the application of N fertilizer.Soil nitrogen content declined at first and then increased with the increasing application of phosphorous fertilizer.Soil nitrogen,especially hydrolyzable nitrogen,was remarkably improved with straw mulching application.Therefore,straw mulching is an efficient measure to maintain and improve the regime of soil nitrogen nutrition.

关 键 词：灌溉施肥 土壤氮库 半干旱区 二次回归旋转设计 

分 类 号：S158[农业科学—土壤学]