优质籼稻不同品种、密度对其产量及构成因素的影响

Effect of Different Varieties. Density on the Excellent Indica Rice Yield and Other Fartors

在田间小区试验条件下 ,以莫王谷、德农 2 11、香优 2 0 0 0、抗优 98为试验材料 ,设计品种与密度二因素五水平的试验 ,分析品种、密度对产量及构成因素的影响。得出结论如下 ,栽插密度在 2 2 5～ 4 6 5万穴 hm2 范围 ,随着栽插密度的增加 ,最高茎蘖数、每株成穗数下降 ,成穗率提高 ,有效穗增多 ,每穗实粒数下降 ,结实率上升 ,千粒重相对稳定 ,产量增加 ;在云南省海拔 14 5 0m以下籼稻区可以大力推广抗优 98和德农 2 11,重点示范莫王谷和香优 2 0 0 0 ,适宜密度掌握在 4 0 5～ 4 6 5万穴 hm2 ,有利于协调各品种的最高茎蘖数、有效穗、成穗率、每穗粒数、结实率和千粒重的关系 ,获得高产。

Mo wang gu、De nong 211、Xiang you 2000、Kang you 98 were used on the experiment in order to study the effects of different variety、density on the yield and other fartors. The results showed that the Rice was planfed within the limits density 225000～465000/hm 2, when the density increased, the maximam tillers and ears could be shorted, the percent age of bear ears. effective ears and filled grains could be increased;1000-grain weight could be stable;Yield could be increased. So Kang you 98、De nong 211、Mo wang gu、Xiang you 2000. Could be greatly planted on the field under an elevation of 1450m in Yunnan. If the limits density is 405000～465000/hm 2, it would be good to regulate relation ships of maximan tillers、effective ears、the percentage of bear ear、filled grains seed setting rate and 1000 grains weight, So the yield must be increased.