摘要
传统耕作对土壤耕作层多次耕翻耙耱是造成我国土地沙漠化的主要根源。为此,引进国外先进的玉米（油葵）免耕播种机,采用定点定时取样、田间调查、室内分析与统计相结合的方法,将免耕播种技术、灭茬免耕播种技术试验示范与传统耕作技术进行对比试验,结果表明：保护性耕作技术可节省机耕费225~375元/hm2,增效765~1 455元/hm2;油葵生长期间,保护性耕作技术不同土层土壤水分提高15%~25%,土壤容重提高25%~48%;油葵收获后,保护性耕作技术的土壤速效养分（氮磷钾）累积比传统耕作高。
Repeated tillage and harrowing and pressing of tillage soil layer under traditional farming were main cause of land desertification in China.For this reason foreign advanced maize（sunflower）no-tillage planter was introduced and a contrast experiment and demonstration was conducted between the no-tillage sowing technology,stubble ploughing no-tillage sowing technology and the traditional farming technology adopting approaches combining fixed sampling,field investigation,laboratory analysis and physical statistics.The results shows that with conservation tillage technology the tractor-ploughing fee could be saved by 225-375 yuan/hm2 and the benefit could be increased by 765-1,455 yuan/hm2,the soil moisture of different soil layer increased by 15%-25% and soil bulk density increased by 25%-48% during the growth of sunflower and soil available nutrients（nitrogen and phosphorus） accumulation after harvesting of the sunflower was higher than that of traditional farming.
出处
《宁夏农林科技》
2012年第8期26-27,32,共3页
Journal of Ningxia Agriculture and Forestry Science and Technology
基金
宁夏农业综合开发土地治理科技推广项目-宁夏中部干旱风沙区生态农业关键技术示范(NTKJ-11-09)
关键词
冬小麦
免耕
复种
油葵
Winter wheat
No-tillage
Multiple cropping
Sunflower
