期刊论文

Effects of Sowing Time and Seeding Rate on Growth Characteristic and Yield of Direct-seeding Early Rice

中文

湖南农业科学

1006-060X

2013

1

13-16,21

10.3969/j.issn.1006-060X.2013.01.005

“十二五”国家粮食丰产科技工程（2011BAD16B01）；

本校为第一机构

以中嘉早17和陵两优211为试验材料,研究了不同播期与播量对直播早稻的生长特性及产量的影响.结果表明:早稻直播越晚,出苗率和成苗率越高,而生育期随之变短,水稻株高随生育期缩短而逐渐变矮；直播时期对早稻产量的影响大于播种量,4月5日播期的产量最高,中嘉早17的平均实际产量为524.1 kg/667m2,陵两优211为491.5 kg/667m2;中嘉早17的直播量以10粒/穴(6.0 kg/667m2)的产量为最高,陵两优211的直播量以7粒/穴(4.5 kg/667m2)最为宜；另外,早稻品种中嘉早17比陵两优211更适合直播.

Zhongjiazao17 and Lingliangyou211 were used as materials to study effects of different sowing time and seeding rates on growth characteristic and yield of direct-seeding early rice.The results showed that with the early rice directly sown later,the emergence rate and the seedling rate were higher,the growth period shortened,and the rice plant height dwarfed.Otherwise,effect of direct sowing time on yield of early rice was greater than that of seeding rate.The yield was the highest when sowing on April 5.The average real yield of Zhongjiazao17 a...