摘要
研究了春玉米不同类型品种和不同生产水平下的生育规律及营养特性，结果表明：高产春玉米（目标产量7500kg／hm2），其最大叶面积系数要求紧凑型为4～4.5，平展型为3．0左右；干物质积累量达到15000kg／hm2或以上，经济系数为0．5左右；N、P、K养分的吸收比例：紧凑型为1．00∶0.18∶1．57，平展型为1.00∶0．28∶1．56；每生产100kg籽粒的N、P、K吸收量：紧凑型为2．14、0．39、3．36kg，平展型则分别为1．92、0．54、3.00kg。
The growth regularity and nutrient characters of different types or spring maize under differentproduchve levels were studies. The results showed that spring maize in bumper yield (the aim or grainyield is 7500kg/ hm2) needs a maximum leaf area index at 4.0~ 4.5 and about 3.0 for the cultivars witherect and flat leaves, respectively; quantity of accumulated dry matter at 15000kg / hm2 or more; theeconomic coefficient at about 0.5; absorption ratio of N, P and K at 1 .00: 0.184: 1 .57 and 1 .00: 0.283:1.56 and quantity of N, P and K absorbed for producing 100kg of grain at 2.14, 0.394 and 3.36kg and1 .92, 0.543 and 3.00kg for the above two types of cultivars, respectively.
出处
《浙江农业学报》
CSCD
1995年第3期190-195,共6页
Acta Agriculturae Zhejiangensis
关键词
玉米
生育规律
营养特性
产量
春玉米
Zea mays
Growth regularity
Nutrient characters, Bumper yield
