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为了进一步明确交代“三早”越稀植栽培依靠个体优势获得高产的基本原理，１９９１～１９９３年设置了穴插秧棵数１～４棵的４个试验处理，在田间钵栽，ｍ２１２．５穴超稀植条件下，监测不同插秧棵数与不同节位、不同次位分蘖生产力的变化规律；穴插秧棵数每增加１棵，有效穗数以１．５个的幅度递增；穗粒数却以１０个以上的幅度递减；１穴插秧棵数超过３棵时有效穗数的增加，补偿不起穗粒数的减少和第二次分蘖穗的千粒重骤减，１～３节低节位分蘖优势减弱，从而造成减产。进一步证实穗数、粒数、千粒重三个产量因素平衡发展，容易获得稳产高产的穴插秧棵数为２～３苗。
In order to further clarify the basic principle that the more sparsely-sowed “three early morning” cultivation depends on the superiority of individuals to obtain high yield, four experimental treatments with 1 ~ 4 seedling transplanting seedlings were set up from 1991 to 1993. In the field of pot cultivation, m212.5 Under the conditions of ultra-thin planting, the variation of tillers productivity under different transplanting seedlings and different node positions and different secondary positions was monitored. For each additional seedling transplanting, the effective spikelet number increased by 1.5, and the spikelets number The number of effective panicles increased when the number of transplanting seedlings per hole was more than 10, which could not compensate for the decrease of the number of spikelets and the sharp decrease of 1000-grain weight of the second tillering spike, and the low node tillers of 1 ~ 3 Weakening advantage, resulting in reduced production. Further confirmed that the spike number, grain number, grain weight three balanced development of yield factors, easy to obtain stable and high yield hole planting seedlings 2 to 3 seedlings.