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根据几年来在实践中摸索,于水稻(早、晚稻)有效分蘖末期用七、九(七○二、九二○,下同)加磷(加氮)液混喷,能控制过多无效分蘖,且不影响穗数下降,在总茎蘖数不太高的田块,易于取得大穗多粒而增产。一、早稻根据一般亩栽30万左右基本苗,在有效分蘖期间(插秧后8—15天)出现的分蘖不足20%,大量分蘖在出现移栽半个月之后,故成穗偏低,只有70%左右,同时容易哄抬茎秆,不易成大穗,还影响通风透光,招致病虫危害。因此在有效分蘖末期混喷七、九液,可以获得控蘖增穗的效果。如练塘公社东镇八队,种植矮南早1号,5月18日移栽,于5月30日有效分蘖末期,用七○二60ppm加九二○15ppm混合液喷洒,喷比不喷的总分蘖数减少
According to years of practice in the exploration, in the late rice (early and late rice) effective tillering stage with seven, nine (702, 920, the same below) plus phosphorus (plus nitrogen) liquid spray can control too much ineffective tiller , And does not affect the decline in the number of spikes, tillers in the total number of plots is not too high, easy to obtain large ears and more grain yield. First, early rice According to the general planted about 300,000 mu of basic seedlings, tillers in the effective tillering (8-15 days after transplanting) appear less than 20%, a large number of tillers in the emergence of transplanting for half a month later, so into the ear lower, only 70% or so, at the same time easy to coax the stem, not easy to become big ears, but also affect the ventilation and light, leading to pests and diseases hazards. Therefore, the effective end of the effective mixed tiller spray seven, nine liquid, you can get tiller control tiller effect. Such as Liantang commune Dongzhen eight teams, planting short South as early as 1, May 18 transplanting, effective end of the tillering on May 30, with 7020ppm plus 9020ppm ppm mixture spray, spray than spray The total number of tillers decreased