摘要
通过在定西进行秸秆覆盖免耕试验，研究了长期连续定位使用秸秆覆盖免耕对土壤中酸解有机总氮变化的累积影响．结果表明：免耕秸秆覆盖能不同程度的增加土壤酸解有机总氮含量，提高土壤肥力，造成土壤养分的表层富集．0～5cm．5～10cm土层有机总氮在播前与收获后差异显著；与传统耕作相比，0～5cm土层有机总氮比对照增加了17．18％．
The influence of permanent no-tillage with straw cover in long term on the change of soil total organic nitrogen had been studied in Dingxi county,one of the typical semi-arid areas in Gansu Province. No-tillage with straw cover （NTS） can improve soil total organic nitrogen in different degrees,especially on the surface. Soil organic nitrogen in 0-5cm, 5- 10 cm layer before sowing and after harvesting appear to have significant difference in NTS. The total organic nitrogen with NTS increased by 17.18 % to conventional tillage with no straw（T）.
出处
《甘肃农业大学学报》
CAS
CSCD
2006年第1期48-51,共4页
Journal of Gansu Agricultural University
关键词
秸秆覆盖
免耕
土壤有机氮
straw cover
no-tillage
soil organic nitrogen
