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一、问题的提出众所周知,疏播培育多蘖壮秧是杂交稻高产的栽培基础。但是,在大面积的生产中,我们还没有一个适应各种情况的秧田标准播种量,而是存在着严重的盲目性。笔者试通过两次以“汕优6”为材料所作的秧田播种密度(单株营养面积)不同与秧苗质素的关系试验,在七迳、林头等4个区、6个乡对“汕优6”、“汕优63”、“汕优30选”和“青优早”4个纽合的40多块大田秧田的调查,结合几年来所积累的资料,研究杂交稻壮秧的群体结构,旨在充分利用和发挥杂交稻秧田低位分
First, the issue put forward As we all know, planting and breeding more tiller seedling is high yielding hybrid rice cultivation basis. However, in large-scale production, we do not yet have a standard seeding rate suitable for all kinds of situations, but there is a serious blindness. The author attempts to test the relationship between the sowing densities (nutrition area per plant) and the quality of seedlings by using “Shanyou 6” as material for two times. 6 “,” Shanyou 63 “,” Shanyou 30 election “and” Qingyouzao "four more than 40 pieces of field seedling field investigation, combined with the accumulated information over the years to study the population structure of hybrid rice seedlings , Aims to make full use of hybrid rice seedling and low points