晚稻免耕抛秧关键技术初探

Probe into key technologies of late rice seedling broadcasting with no-tillage

为解决双季晚稻季节紧张的矛盾,寻找一条既能赶上季节,又能节本增效的水稻栽培新技术,以常耕抛秧为对照(CK),进行免耕抛秧不同晒蔸时间、沤田时间对比试验及不同基蘖肥与穗粒肥简比试验。试验结果表明:经过适当缩短晒田和沤田时间以后,提早抛秧5d的单产比对照提高15.6%,早抛3d产量比对照提高13.5%。同一水稻品种在相同的施肥水平条件下,采用不同的基蘖肥与穗粒肥配比进行施肥,以基蘖肥与穗粒肥配比为8∶2处理产量最高,其次是7∶3,分别比10∶0增产15%和11.97%。

In order to solve the problems of limited farming time between early rice and late rice,and to find a new technology for catching up season and cost-saving.To take tillage cultivation as a ck,a comparative study of different root sun-cure times,field water-logging times was conducted for the representation research in fertilizer application and yield.The results show that after properly shortening of the field drying and fermenting times,5 days seedling broadcasting earlier,the yield per unit area will be higher than the CK by 15.6%,13.5% higher in yield compared for 3 days earlier.Under the same fertilization level of same rice variety,among different proportion between base fertilizer and ear fertilizer application,the 8∶2 treatment will have the highest yields,the second high is 7∶3,with 15% and 11.97% yield-increase respectively comparing to the yield of 10∶0.