摘要
为北方干旱半干旱地区免耕农业可持续发展提供理论依据,以1992年建立的山西省临汾市尧都区机械化保护性耕作试验示范区为研究对象,用统计学方法,研究连续25年免耕覆盖(25y-NTS)、21年免耕覆盖(21y-NTS)和传统耕作(TC)对土壤理化性质的影响。结果表明:长期连续免耕的土壤含水量高于传统耕作,25y-NTS处理明显高于21y-NTS,在0~10cm和10~20cm土层中,土壤全氮和全磷含量为25y-NTS>21y-NTS>TC;土壤全钾含量为25y-NTS>TC>21y-NTS;免耕处理对土壤有效磷、速效钾、铵态氮均有显著影响,免耕土壤硝态氮含量显著高于传统耕作,在10~20cm土层,25y-NTS土壤硝态氮含量比21y-NTS高128.36%。
The effects of continuous no-tillage with mulch for 25 years,continuous no-tillage with mulch for 21 years and traditional farming on soil physical and chemical properties in Yaodu mechanization conservation farming experimental demonstration area built in 1992,Linfen,Shanxi,were studied by the statistical method to provide the theoretical basis for sustainable development of no tillage agriculture in arid and semi-arid regions in Northern China.Result：The moisture content of soil under the long-term continuous no-tillage with mulch is higher than the traditional farming and the moisture content of soil under the continuous no-tillage with mulch for 25 years is obviously higher than the continuous no-tillage with mulch for 21 years.Total nitrogen and total phosphorus content of soil with 0～10 cm and 10～20 cm depth is the continuous no-tillage with mulch for 25 years the continuous no-tillage with mulch for 21 yearsthe traditional farming but total potassium content of soil with 0～10 cm and 10～20 cm depth is the continuous no-tillage with mulch for 25 years the traditional farming the continuous no-tillage with mulch for 21 years.No-tillage treatment has the significant effects on available phosphorus,rapid available potassium and ammonium nitrogen content of soil.The nitrate nitrogen content of soil under the no-tillage with mulch is higher than the traditional farming significantly and the nitrate nitrogen content of soil with 10～20 cm depth under the continuous no-tillage with mulch for 25 years is 128.36% higher than the continuous no-tillage with mulch for 21 years.
作者
辛未冬
李红娟
贾绍辉
刘倩
XIN Weidong;LI Hongjuan;JIA Shaohui;LIU Qian(College of Geographical Sciences, Shanxi Normal University ~ Linfen, Shanxi 041000;Yaodu Agricul- tural Machinery Technology Extension Station, Lin fen , Shanxi 041000 ,China)
出处
《贵州农业科学》
CAS
2018年第4期61-64,共4页
Guizhou Agricultural Sciences
基金
国家自然科学基金青年项目(41701287
41301304)
关键词
连续免耕
土壤理化性质
旱地
continuous no tillage
soil physical and chemical property
dry land
