不同栽培密度对头季稻及再生稻产量的影响

Different cultivation densities' impact on the yields of first season rice and ratoon rice

为充分利用一季中稻地区的光温资源,提高复种指数,增产增收,以超级稻中浙优1号为供试材料,开展不同栽培密度对头季稻及再生稻产量影响的试验研究。结果表明,以栽培密度24万蔸/hm2、27万蔸/hm2、30万蔸/hm2头季稻及再生稻产量较高,尤其以密度27万蔸/hm2头季稻及再生稻产量最高,头季有效穗数295.5万穗/hm2,每穗总粒数171.2粒,每穗实粒数132.4粒、结实率77.3%,产量9466.97kg/hm2;再生稻有效穗数377.6万穗/hm2,每穗总粒数66.5粒,每穗实粒数50.2粒、结实率75.5%,产量3350.17kg/hm2等性状均最高,可在一季中稻区推广应用。

In order to make full utilization of light and temperature resources in one-season middle-season rice area, increase cropping index, yield and income, super rice Zhongzhe No.1 was chosen as test material, an experiment of different cultivation densities＇ impact on the yields of first season rice and ratoon rice was conducted. The results show that when the density iss 240, 000 clumps/hm2, 270, 000 clumps/hm2,and 300, 000 clumps/hm2, the first season rice and ratoon rice will have the higher yields; especially for the density of 270, 000 clumps/hm2, they will have the highest yield. （ for first season rice： effective ears of 2.955 million/hm2, total grains of 171.2/ear, solid grains of 132.4/ear, maturing rate of 77.3%, yield of 9466.97kg/hm2;for ratoon rice： effective ears of 3.776 million/hm2, total grains of 66.5/ear, solid grains of 50.2/ear, maturing rate of 75.5%, yield of 3350.17kg/hm2, which could be extended in one-season middle-season rice area.