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。
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.
出处
《华北农学报》
CSCD
北大核心
2010年第B08期202-204,共3页
Acta Agriculturae Boreali-Sinica
基金
国家科技支撑计划课题(2007BAD89B08)
关键词
小麦
养分利用率
免耕
Wheat
Nutrient use efficiency
No-till
