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对辽宁省玉米种植密度偏稀问题的研究与思考
引用本文:李凤海,史振声,张世煌,王志斌,王宏伟,吕香玲,朱敏,刘红军.对辽宁省玉米种植密度偏稀问题的研究与思考[J].玉米科学,2010,18(3):113-116.
作者姓名:李凤海  史振声  张世煌  王志斌  王宏伟  吕香玲  朱敏  刘红军
作者单位:1. 沈阳农业大学,沈阳,110161
2. 中国农业科学院作物科学研究所,北京,100081
基金项目:“十一五”科技支撑计划项目“东北春播玉米稳产技术措施研究与示范”(nyhyzx07-003-01-01)、东北平原南部(辽宁)春玉米丰产高效技术集成研究与示范(2006BAD02 A12)
摘    要:以辽宁省不同地区的增密栽培试验为基础,结合对品种推荐密度和生产上实际密度的调查结果,揭示出辽宁省玉米种植密度偏稀的问题十分突出。生产上的实际密度很少高于45000株/hm2,其中低于37500株/hm2的地块占52%,37500~42000株/hm2的占31%。育种家对品种的推荐密度比栽培试验的适宜密度低10%以上,生产上的实际种植密度又比推荐密度低10%以上。根据密度试验和调查结果分析,在现有密度基础上提高20%,产量将提高10%。

关 键 词:玉米  种植密度  产量  辽宁省
收稿时间:2009/5/15 0:00:00

Study and Consideration on Less Normal Density Problem of Maize in Liaoning Province
LI Feng-hai,SHI Zhen-sheng,ZHANG Shi-huang,WANG Zhi-bin,et al..Study and Consideration on Less Normal Density Problem of Maize in Liaoning Province[J].Journal of Maize Sciences,2010,18(3):113-116.
Authors:LI Feng-hai  SHI Zhen-sheng  ZHANG Shi-huang  WANG Zhi-bin  
Abstract:Based on densification cultivation trials in different regions in Liaoning province and combined with investigation of recommendatory density and actual density of hybrids in field production,the paper revealed that the problem of less normal density was very serious in Liaoning province.The density in actual field production was rarely more than 45 000 plants/ha.The field was respectively 52%(less than 37 500 plants/ha) and 31%(between 37 500 - 42 000 plants/ha) in different densities.Compared to suitable density in field production,more than 10% lower that of density the breeder recommended.While the actual density was above 10% lower than recommendatory density.According to density trials and investigation results,it was conservatively estimated that the yield could increase more than 10% based on the density increasing around 20%.
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