摘要
以郑单958夏玉米为试材,设种植密度52 500株/hm2、60 000株/hm2、675 000株/hm2和75 000株/hm2共4个处理,通过防雨棚下测坑试验,研究了不同种植密度对夏玉米形态指标、耗水量、产量及其构成因素的影响。结果表明:各密度群体LAI动态变化呈单峰曲线趋势,随密度增加峰值增大,处理间株高差异不明显;夏玉米全生育期耗水量随种植密度的增加而增加;棵间土壤蒸发量随种植密度的增加而减少;不同处理阶段耗水量和日耗水强度总体变化趋势一致,相差幅度不大;产量随种植密度增加而增加,产量构成因素则随种植密度增加呈现减少趋势。研究结果可为夏玉米节水高产栽培提供参考依据。
By adopting 4 different density ranging from 52 500～75 000 plant per hektare on summer maize（＂Zhengdan 958＂ genotype） grown in non-weighting lysimeters under a rain shelter,the effect of different plant density on morphological index,water consumption and yield of summer maize were studied.The results showed that the dynamics LAI of each treatment showed a single peak curve trend,while the peak value increased with the planting density increasing.Plant height was not significantly different among treatments.The water consumption increased and the evaporation decreased with the increase of planting density in the whole growth period of summer maize.The change of water consumption in different stages and daily water consumption intensity showed the same trend,and the difference value was different to a lesser extent.The yield increased in parallel with density increasing and the yield component showed decreasing trend.The results would provide reference for water-saving and high-yield cultivation of summer maize.
出处
《节水灌溉》
北大核心
2010年第9期8-10,14,共4页
Water Saving Irrigation
基金
国家现代农业产业技术体系建设专项资金
国家科技基础性工作专项"中国农业气候资源数字化图集编制"(2007FY120100)共同资助
关键词
种植密度
形态指标
耗水量
产量
产量构成因素
planting density
morphological index
water consumption
yield
yield components
