膜下滴灌棉田土壤磷钾养分空间分布特征  

Space Distribution Characteristics of Phosphorus and Potassium in the Under-film Trickle Irrigation Cotton Field

作　　者：姜益娟[1] 郑德明[1] 柳维杨[1] 王家强[1] 牛建龙[1] 

机构地区：[1]塔里木大学植物科技学院,新疆阿拉尔843300

出　　处：《塔里木大学学报》2007年第3期1-5,共5页Journal of Tarim University

基　　金：塔里木大学校长基金资助项目(编号:TDZKZD5005)

摘　　要：通过对膜下滴灌棉田土壤速效磷钾养分时空分布研究，结果是棉花滴灌水前0-20cm土层水平方向速效磷钾含量变化波动幅度较大，20-60cm土层变化幅度较小。滴水后表层土壤速效磷含量变化波动逐渐变小，速效钾含量变化幅度且较大；0-60cm土层土壤速效磷钾含量自表层垂直向下的分布特点分别是：磷素为10-20cm〉0-10cm〉20-40cm〉40-60cm，钾素为0-10cm〉40-60cm〉10-20cm〉20-40cm；随时间变化特点是：耕层土壤速效磷钾含量从苗期开始均上升，到盛蕾期达最大值，盛蕾期后基本呈直线缓慢递减，不同的是棉花吐絮后土壤速效钾含量回升较快。Though study of space distribution characteristics of soil phosphorus and potassium in under - film trickle irrigation cotton field, it＇s found that the variety of the content of cotton field soil phosphorus and potassium was ： fluctuation was bigger in the horizontal direction in the layers of 0-20cm, while it＇s smaller in the layersof 20-60cm; phosphorus content fluctuation in the skin soil gradually became small after being trickling and potassium content fluctuation became big; the verdical distribution characteristics of the phos- phorus and potassium from the skin layer to the deep layer in 0-60cm layers respectively were： for phosphorus it＇s 10 -20cm 〉 0-10cm 〉 20 - 40cm 〉 40 - 60cm; for potassium it＇s 0 - 10cm 〉 40 - 60cm 〉 10 - 20cm 〉 20 - 40cm ; the characteristics with the time changes were： the content of the phosphorus and potassium in the ploughing layer went up from the seedling stage, and the maximum was reached in the stage of flourishing bud ; then slowly decreased, basically straightly ; what＇s different was the content of the phosphorus and potassium rised again rapidly after the opening of bolls.

关 键 词：膜下滴灌 土壤速效磷 土壤速效钾 分布特征 

分 类 号：S562.061[农业科学—作物学]