中国农业大学学报2017，Vol.22Issue(4)：10-15,6.DOI:10.11841/j.issn.1007-4333.2017.04.02
种子出苗率对玉米个体生长和群体产量的影响
Effects of seedling emergence ratio on the growth and yield of maize (Zea mays L.)
摘要
Abstract
To clarify the effect of seedling emergence ratio on grain yield in maize,maize cultivars‘Zhengdan 958’,‘Jingke 968’ and ‘Jindan 73’ were selected as experimental materials.After seedling setting,plants were shinned to densities of 80％,85％,90％,95％ and 100％ of the full density for each cultivar,which mimicked the corresponding seedling emergence.The growth and population yield of individual plant were investigated.The results showed that:The plant and ear height of three cultivars were not affected by thinning,while the weight and length of the ear increased,and the length of bare tip decreased when the seedling emergence ratio decreased;The yield reached the highest at 100％ density for all three cultivars,and decreased with the decreasing of seedling emergence ratio.For cultivars Zhengdan 958 and Jingke 968,the yield decreased slightly when seedling density decreased from 100％ to 85％,and the yield decreased significantly when the seedling density decreased further.Meanwhile,the yield of cultivar Jindan 73 slightly decreased when the seedling density decreased from 100％ to 90％,and then decreased significantly when the seedling density decreased further.This research suggested that the seedling emergence ratio should be higher than 95％ for cultivars Zhengdan 958 and Jingke 968,and higher than 90 ％ for cultivar Jindan 73 to guarantee high crop yield.关键词
玉米/出苗率/生长/产量Key words
maize/seedling emergence ratio/growth/yield分类
农业科技引用本文复制引用
任利沙,顾日良,贾光耀,于晓芳,杨晓军,王建华..种子出苗率对玉米个体生长和群体产量的影响[J].中国农业大学学报,2017,22(4):10-15,6.基金项目
农业部公益类行业(农业)科研专项(201303002) （农业）
国家玉米产业技术体系重点研发任务(CARS-08) （CARS-08）
