播期对玉米产量构成因素及产量的影响

摘要

This test by maize Research Institute of Liaoning Academy of Agricultural Sciences of maize varie-ties Liaodan 588 as the research object,in shenyang shenbei and chaoyang jianping two different regions was carried out by different sowing time on maize yield and yield components of impact study in 2014.Test set up four seedtime on April 20,April 30,May 10,and May 20th,repeated three times,and single factor random-ized block design completely.Experimental results show that,with the sowing date delaying,Liaodan 588 plant height,ear height,effective spike length,grain number and grain yield were reduced gradually.Thick stems with the loss of the plant height with the trend of enlargement.A trend toward a reduction in dry matter accumulation,early sowing seeds dry matter accumulation is higher than other period.Yield results indicate that early sowing could promote yield gain of Liaodan 588.%试验以辽宁省农业科学院玉米研究所选育的玉米品种辽单588为研究对象，2014年，在沈阳市沈北新区和朝阳市建平县两地开展了不同播种时期对玉米产量构成因素及产量的影响研究。试验设置4个播种时期4月20日、4月30日、5月10日和5月20日，3次重复，单因素完全随机区组设计。试验结果表明，随着播期的推迟，辽单588的株高、穗位高、有效穗长、行粒数和产量均逐渐降低，茎粗随着株高的降低有增粗的趋势。干物质积累呈现出下降的趋势，早播干物质积累高于其他播种时期。测产数据显示，适时早播有利于辽单588产量提高。