摘要
通过2年的田间试验，研究了控释尿素一次性基施和普通尿素不同基追比对旱地春玉米光合特性、产量及水分利用效率的影响。结果表明：等氮量的控释尿素与普通尿素相比，产量和水分利用效率差异不显著，但等氮量的控释尿素较普通尿素2年平均增产幅度为4．1％-5．8％，产量构成因素中百粒重和行粒数优势较大。同时，控释尿素能保持较高的光合性能和千物质积累量。因此，综合考虑玉米生长发育及产量水分效应，在本试验条件下，陇东旱地春玉米生产中以控释尿素（纯N）240kg／hm^2为最佳施肥量。
Effects of application of controlled release urea and top dressing ordinary urea with of various proportions on drytand spring maize yield and photosynthetic characteristics were studied through two years field experiment. The results showed that the effects of controlled release urea and ordinary urea on yield and water use efficiency （WUE） were not significant,but the two years maize average yields under equal amount of controlled-release urea was increased by 4.1% -5.8% than ordinary urea,the 100-grain weight and kernels per row were higher too. At the same time ,controlled release urea can maintain higher photosynthesis characteristic and dry matter accumula- tion. Therefore, for comprehensive consideration of maize growth, development, yield and water use efficiency, 240kg/hm^2 controlled-release urea （N） is the optimum fertilizer application amount for the dryland spring corn production in Loess Plateau, East of Gansu.
出处
《作物杂志》
CAS
CSCD
北大核心
2014年第5期113-116,共4页
Crops
基金
国家玉米产业技术体系(CARS-02-66)
公益性行业(农业)科研专项(201303104)
关键词
春玉米
控释尿素
光合特性
产量
水分利用效率
Spring maize
Controlled released urea
Photosynthetic characteristics
Yield
Water use efficiency
