摘要： 采用裂区试验设计,研究了不同耕作及秸秆还田条件下小麦氮、磷、钾养分利用率。结果表明,免耕覆盖与常规耕作相比显著降低了小麦秸秆和籽粒产量。氮、磷利用率分别降低了8.19和0.64个百分点,钾素利用率提高了3.05个百分点。氮磷钾平衡施用,两种耕作方式下的小麦养分利用率均能提高。免耕覆盖处理小麦秸秆氮、磷、钾含量均高于常规耕作处理,钾素尤为明显。

关键词: 小麦, 养分利用率, 免耕

Abstract: The nutrient use efficiency in wheat was studied in this article by using split-plot design. The result showed that the wheat yield was significantly depressed under no-till than the conventional tillage. The nitrogen use efficiency under no-till was down by 8. 19 percentage points from conventional tillage,and the phosphorus use efficiency under no-till was down by 0. 64 percentage points. The potassium use efficeincy under no-till was 3. 05 percentage points higher than that under conventional tillage. The nutrient use efficiency was increased by balanced fertilization in two tillages. The N,P,and K content of the wheat straw under no-till was higher than that under conventional tillage,especially the potassium.

Key words: Wheat, Nutrient use efficiency, No-till

中图分类号: 

• S143