不同水稻种子包衣剂免耕直播效应的初步研究

目的]为了解决晚稻播种时气温高,水分蒸发量大,水分需求矛盾突出的问题。方法]设5个处理:C(1普通包衣剂旱育保姆)、C2(普通包衣剂+1%保水剂A)、C(3普通包衣剂+1%保水剂B)、C(4普通包衣剂+1%保水剂B+0.5%氧化钙)、C(5空白对照),研究了不同水稻种子包衣剂的免耕直播效应。结果]旱育保姆包衣剂能够比空白对照提高出苗率15.2%,增产9.8%;旱育保姆包衣剂中添加保水剂后,出苗率增加6.6%,增产12.1%;保水剂B的添加效果优于保水剂A。结论]使用旱育保姆包衣剂进行免耕直播栽培水稻,能够提高种子的出苗率、增加穗数、提高产量;而添加保水剂成分的处理由于能较好地解决高温时期的种子水分供应,促进直播水稻的生长发育和经济性状的协调发展,增产效果更明显。直播水稻添加适量的氧化钙,对种子的出苗率有积极影响。

Preliminary Research on the Effect of Direct Sowing with Zero-tillage by Different Rice Seed Coatings

Objective The study aims to solve the problems appeared in sowing of late rice,such as that high temperature and great evaporation capacity caused the obvious incement of water need.Method The effects of direct sowing with zero-tillage by different rice seed coatings were studied with 5 treatments as C1 common coating(Hanyubaomu),C2 common coating 1 % water holding agent A,C3 common coating 1 % water holding agent B,C4 common coating 1 % water holding agent B 0.5 % calcium oxide and C5 blank CK.Result Compared with CK,the Hanyubaomu seed coating could increase the seedling rate by 15.2 % and yield by 9.8 % and when it added water holding agent it could increase the seedling rate by 6.6% and yield by 12.1%,and the effect of water holding agent B was better than that of water holding agent A.Conclusion The rice directly sowing with zero-tillage by Hanyubaomu seed coating could increase seedling rate,spike number and yield.The treatment added water holding agent had more significant yield increasing effect,due to that it could solve the problem of seed water supply in high temperature period and promote growth and development of direct sowing rice and coordinated development of its economic characteristics.Direct sowing rice added appropriate calcium oxide had a positive effect on seed seedling rate.