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

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 and Lingliangyou211 was 7 861.5 kg/hm2 and 7 372.5 kg/hm2,respectively.The optimal direct seeding rate of Zhongjiazao17 and Lingliangyou211 was 10 tablets/hole(90 kg/hm2) and 7 tablets/hole(67.5 kg/hm2),respectively.In addition,compared with Lingliangyou211,Zhongjiazao17 is more suitable for direct-seeding.