杂交中籼新组合Ⅱ优838主要特征特性及高产栽培技术

Analysis of the Main Characteristics and the High-yield Cultivation Techniques of the New Medium Indica Rice Combination-ⅡYou 838

Ⅱ优 8 38在省区试及生产试验中 ,平均产量为 8.41t/hm2 ,比汕优 6 3增产 6 .46 % ,且抗病性好 ,适应范围广。与汕优 6 3相比具有每穗总粒数多、结实率、千粒重高等特点。在栽培上应注意采用培育多蘖壮秧等方法 ,以增加有效穗 ,使其达到高产、稳产。

The average grain yield of rice combination Ⅱyou 838 was 8.41 t/hm 2, which was 6.46% higher than Shanyou 63 in Provincial Regional Test for three years. It also had stronger resistance to diseases and wider adaptation, many more number of spikelets per panicle, higher rate of seed-setting and higher 1000-grain weight compared with Shanyou 63. In cultivation, more attentions must be paid to breed new variety with strong seedling so that the number of effective panicles, high and stable grain yield would be obtained.