摘要
为了提高寒地半干旱地区糜子产量,采用裂区设计,密度为主区,设4个水平,45、52.5、60、67.5万株/hm2;施氮量(纯氮)为亚区,设5个水平,0、45、60、135、180kg/hm2,共20个处理,对糜子不同种植密度和施氮量对产量性状影响的研究,比较产量差异及叶绿素、叶面积、土壤碱基氮的变化特征。结果表明:密度在60万株/hm2,施氮量在60kg/hm2策略下,既能获得较高产量又能获得较高的经济效益。为了获得较高的产量,在低密度条件下,应适当增加施氮量,增加养分,促进分蘖,随着密度的增加,应适当减少施氮量,控制分蘖,使糜子收获时的密度达到或接近62万株/hm2～69万株/hm2这一范围内最适密度。
The aim was to improve the yield of millec in frigid and semiarid zone. Using split-plot design, density-based area, located four levels for the sub-region to recover nitrogen, 45, 52.5, 60, 67.5 million/bin2; located 5 level, 0, 45, 60, 135, 180 kg/hm2, a total of 20 treatments, compare yield differences and chlorophyll, leaf area, soil nitrogen base variation. The results showed that, density of 60 million/hm2, chasing nitrogen in 60 kg/hm2 strategy, access to both a higher yield but also a higher economic efficiency. In order to obtain a higher yield, in the low-density conditions, should be increased to recover nitrogen, increased nutrients, and promote tillering. In the high-density conditions, the nitrogen should be reduced to recover the control tiller, so that the density of millet harvest reached densities at or close to 62 million/hm2-69 million/hm2 optimum density within the range.
出处
《中国农学通报》
CSCD
2012年第36期188-194,共7页
Chinese Agricultural Science Bulletin
基金
国家谷子糜子产业技术体系资助项目(CARS-07-06B)
关键词
糜子
密度
施氮量
产量
综合性状
millet
density
chase nitrogen
production
character
