摘要
采用田间小区试验方法研究了不同氮钾配比下春玉米生物产量及其组分动态。结果表明,不同氮钾配比下春玉米总生物量及粒重的增长均符合Logistic 方程;营养体干重随时间的变化符合回归方程Y= axebx ;生物产量依子粒产量和营养体干重变化符合回归方程Y= exp(a + b1x1 +b2x2) 。适宜的氮钾配比及施肥技术促进玉米植株生育前期总生物量的积累以及生育后期干物质从营养体向子粒的转移,从而获得较高的子粒产量。
Field trial was conducted to analyze the dynamisc of biomass yield and its components(grain and vegetative yield)of spring maize under different ratios of nitrogen to potassium.The results indicated that the dynamic changes of total bio-mass and grain weight in maize under different ratio of nitrogen and potassium could be described by Logistic curve equation,and that of grain yield(X 1)and vegetative yield(X 2),as described by regression equation of Y=exp(a+b 1x 1+b 2x 2).The increasing duration and increasing rate of bio-mass yield and grain weight,and the increasing duration of vegetative yield and its decreasing rate were obviously influenced by different ratios of N to K.Rational ratio of N to K and their appropriate application rate did not only accelerate the accumulation of total bio-mass in earlier growth stage,but also stimulated the rapid transformation of vegetative dry matter to grain in later growth stage,resulting in high grain yields.
出处
《玉米科学》
CAS
CSCD
1999年第4期57-60,72,共5页
Journal of Maize Sciences
基金
"九五"国家重中之重科技攻关项目
关键词
氮钾配比
春玉米
生物产量
其组合动态
Ratios of N to K
Spring maize
Grain yield
biomass yield
Dynamic
