丹江口库区坡耕地不同轮作模式作物生产力及农田养分流失比较  

Crop Productivity and Comparison of Farmland Nutrient Loss in Different Crop Patterns on Slope Land in Danjiangkou Reservoir Area

作　　者：李承力[1] 杨特武[1] 徐君驰[1] 巴瑞先[2] 熊桂云[2] 陈防[3] 刘冬碧[2] 王苹 

机构地区：[1]华中农业大学农业部华中作物生理生态与栽培研究重点开放实验室,武汉430070 [2]湖北省农业科学院植保土肥研究所,武汉430064 [3]中国科学院武汉植物园,武汉430074 [4]湖北省十堰市土肥站,湖北十堰442100

出　　处：《水土保持学报》2011年第4期83-87,共5页Journal of Soil and Water Conservation

基　　金：国家"十一五"科技支撑计划"沿湖农业"项目"沿丹江口南水北调水源库区农业生态恢复技术研究与示范"课题(2007BAD87B09);油菜现代产业技术体系建设项目

摘　　要：在丹江口库区习惯施肥条件下,比较坡耕地不同轮作系统的作物生产力及农田水土和养分流失的差异。结果表明,在5种轮作模式中,作物生产力水平以"小麦-玉米"轮作最高,生产效益以"油菜-玉米"轮作最高;农田产流量、土壤侵蚀量和磷钾养分流失量均以"小麦-玉米"轮作最小,"小麦-芝麻"轮作最大;而氮流失量以"油菜-玉米"轮作最小,以"小麦-芝麻"轮作最大。因此,"小麦-玉米"轮作为丹江口库区坡耕地适宜的环保型作物复种模式。Comparison of the crop productivity,water and soil erosion and nutrient loss from runoff was conducted in different rotation patterns on slope farmland under farmer＇s common fertilization practice in Danjiangkou reservoir area.The results showed that,the highest crop productivity and the highest economic income were obtained in ＇wheat-maize＇ and ＇oilseed rape-maize＇ pattern,respectively,amongst the five rotation patterns;The total amount of runoff and soil erosion,and the amount of total phosphorus（TP） and dissolved potassium（DTK） losses was the lowest in ＇wheat-maize＇ pattern,but the amount of total nitrogen（TN） loss was the lowest in ＇oilseed rape-maize＇ pattern.The highest runoff and soil erosion,and the highest losses of TN,TP and DTK were found in ＇wheat-sesame＇ pattern.Taken together,the environment suitable crop rotation is ＇wheat-maize＇ pattern on slope farmland in Danjiangkou reservoir area.

关 键 词：轮作 作物生产力 坡耕地 水土流失 养分流失 

分 类 号：S157.1[农业科学—土壤学] S158.3[农业科学—农业基础科学]