摘要
以‘武运粳24'为试验材料,研究在同一种植密度条件下,5个不同播幅对机条播水稻产量及其生长发育的影响。结果表明:在本试验条件下,条播水稻的产量随着播幅的增大呈现先增加后减小的趋势,以播幅为5 cm时的产量最高,达到9.064 t/hm^2;播幅的增大有利于提高中期水稻分蘖能力和缓解高峰苗后分蘖消亡速率,播幅5 cm的高峰苗数比2 cm的增加了8.1%,而无效分蘖消亡速度降低了9.9%,最终有效穗数多;播幅5 cm基部第一、二节间总长比2 cm处理减少了3.32 cm;高效叶面积比例比2 cm处理增加了3.47,播幅大的处理节间和上层叶面积的配置更加合理,更易于塑造抗倒和高光效群体。
The keng rice cultivar ＇ Wuyunjing 24＇ was used as a test material,and effects of 5 different sowing widths on the growth and yield of machine-drilled rice were investigated at the same planting density.The results showed that in this test conditions the yield increased at first and then decreased with the sowing width increasing,and when the sowing width was 5 cm the yield was the highest,or 9.064 t/hm^2;The increase of sowing width helped to improve the mid-term rice＇ s tillering ability and alleviate the tiller death rate after peak tillering;Compared with the 2-cm sowing width,the 5-cm sowing width treatment made the peak of seedling number increase by 8.1% and the ineffective tillering rate decrease by 9.9% ,thus gaining more ear-bearing tillers;The basal first 2 internodes＇ length under the 5-cm sowing width treatment was 3.32 cm less than that under the 2-cm sowing width treatment but the proportion of efficient leaf area increased by 3.47;The larger sowing width treatment made the internode and upper leaf area configuration more reasonable and easily formed the plant population with lodging resistance and high photosynthetic efficiency.
出处
《上海农业学报》
CSCD
2015年第5期115-117,共3页
Acta Agriculturae Shanghai
关键词
水稻
产量
群体质量
机播
播幅
Rice
Yield
Population quality
Mechanical sowing
Sowing width
作者简介
顾树平（1964-）男，大学本科，高级农艺师，长期从事稻麦高产栽培技术研究和推广。E-mail：gsp085@163．com
