【摘要】 以金创8和郑单958为试验材料,研究了氮肥用量对粮饲兼用型玉米叶面积指数、比叶重、干物质积累、群体相对生长率和群体绝对生长率的影响,结果表明:两品种干物质积累及叶面积指数均随着生育进行而增加,到抽雄期达到最大值,而比叶重随着生育进行而下降.两品种群体绝对生长率和相对生长率表现为拔节-大口期高于大口-抽雄期,增施氮肥有利于提高两品种叶面积指数、干物重及群体绝对生长率.更多还原

【Abstract】 Jinchuang 8 and Zhengdan 958 were used to study the influence of nitrogen fertilizer on leaf area index(LAI)、leaf weight ratio(LWR)、dry matter accumulation、relative growth rate(RGR)and crop growth rate(CGR)of foodstuff maize.The results showed that dry matter accumulation and LAI increased with the growing,and reached the highest at tasseling stage,but the LWR showed the reversed trend.CGR and RGR during seedling to flare opening stage were higher than that during flare opening to tassedling stage,more nitrogen fertilizer was attributed to improve LAI、dry matter accumulation and RGR.更多还原