Effects of Direct Seeding Models on Seedling Emergence of Rice
Xin Caiyun
Zhou Xuebiao
Liu Qihua
Zhao Qinglei
Wang Yu
Ma Jiaqing
Abstract：To make clear the effects of rice direct seeding models on seedling emergence,taking Shengdao 2572 as material,the emergence rate and growth of seedlings were investigated under the conditions of dry direct seeding with the soil depth of 0,1,2,3 cm and water direct seeding with the water depth of 5,10 cm.The results indicated that the emergence rate decreased with the increase of soil and water depth.The emergence rate of H0,H1 and H2 treatments were all over 70％.Compared with H0 treatment,the emergence rate of H1,H2 and H3 treatments decreased by 10.9％ ～ 36.9％,and those of W5 and W10 treatments decreased by 30.8％ and 64.8％.For 18 days after sowing,the plant height,aboveground fresh weight and dry weight decreased with the increase of soil and water depth.H0 treatment had the highest plant height and the biggest aboveground fresh and dry weight.For 22 and 26 days after sowing,the plant height,aboveground fresh weight and dry weight increased with the increase of soil depth and decreased with the increase of water depth.The comprehensive analysis showed that the water depth under the water direct seeding had bigger influence on the rice emergence rate,plant height,aboveground fresh weight and dry weight.Under the condition of dry direct seeding,the suitable sowing depth was 2 ～ 3 cm.Under the condition of water direct seeding,the water depth after sowing was not more than 5 cm.
Keywords：RiceDirect seeding modelSeedling emergence
Publication Date：2017-03-02
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：4( 69-72 )