杂交中稻Ⅱ优7号的高产生理基础与栽培技术的初步研究

Study on the High Yield Physiology Base and Cultural Techniques for Ⅱ-You 7 Hao,a New Hybrid Mid season Rice with High Yield and Good Quality

1998～ 2 0 0 0年 ,研究了杂交中稻Ⅱ优 7号的高产生理基础与栽培技术。结果表明 :Ⅱ优 7号高产的生理基础是库大源足 ,Ⅱ优 7号产量为 90 0 0kg/hm2 以上的库源特征为 :齐穗期叶面积指数 6 5～ 7 0 ,成熟期叶面积指数 3 4～ 4 0 ,成熟期干物重 1875 0kg/hm2 左右 ,颖花 375 0 0万朵 /hm2 左右 ,齐穗期叶粒比 1 7cm2 /粒。Ⅱ优 7号的主要高产农艺措施是 :移栽叶龄 3～ 4叶 ,栽 2 4～ 2 7万穴 /hm2 ,施纯N 16 5～ 180kg/hm2 。

From 1998 to 2000, fifteen hybrid mid season rice combinations were used to study the high yield physiology and cultural techniques of Ⅱ You 7 hao. Ⅱ You 7 hao, with a yield of 9000kg per hectare or more, share the following sink source characteristics: LAI 6 5～7 0 at full heating and 3 0～4 0 at maturation; biomass yield 18750kg per hectare at maturation; spikelet number over 37500 per hectare, and the ratio of leaf area to grain about 1 7cm 2 per grain. The high yield cultural techniques of Ⅱ You 7 hao are as the following: planting date at 3～4 leaves for rice seedlings, planting density in 24×10 4～27×10 4 hills per hectare,the number application of N in 165～180kg per hectare.