超级稻“三定”栽培法研究Ⅲ．不同栽培方式对超级杂交稻产量形成的影响

超级杂交稻的优化(稀植、结构施肥)栽培试验于2002-2004年在长沙进行,以比较不同栽培方法对超级杂交稻产量及物质生产的影响。以两优培九为材料,并以汕优63作为对照。结果表明,两种栽培法,两个供试品种的产量表现不同,其中两优培九采用优化栽培单产为8.20～10.37t/hm2,比传统栽培增产显著。主要表现为有效穗多,而结实率、千粒重、穗实粒等产量因子差异不明显。汕优63采用优化栽培单产比传统栽培减产0.37%～8.8%。两种栽培方法间的茎蘖发生动态和单株分蘖数存在极显著差异,两组合单株分蘖数优化栽培比传统栽培分别多110.36%和110.64%,但由于移栽密度不同,两种栽培方式间的单位面积分蘖数没有明显差异。两优培九采用优化栽培的在各个生育时期,植株体内的含氮量比传统栽培的高。

Studies on San-Ding Cultivation Method for Super Rice Ⅲ. Research on the Optimizing Cultivation Method of Super Hybrid Rice

In order to compare the effects of different cultivation methods on the yield performance and dry matter production of super hybrid rice, the optimize cultivation (OM) experiment with Liangyoupei 9 and Shanyou 63(CK) was conducted in Changsha from 2002 to 2004. The results indicated that two kinds of cultivation methods, two varieties displayed the different yield, of which the performance yield of Liangyoupei 9 was 8.20~10.37t/hm2 by using OM and significantly higher than that of CK, in which there were more effective panicles, but not significantly. The yield of Shanyou 63 by using OM reduced 0.37%~8.8% compared with CK. Dynamics changes of stems and tillers and tiller number per seedling between two cultivation methods existed extremely significantly difference, the tiller number per hill of two varieties by using OM were more 110.36%~110.64% than that of CK, but the tiller number pre land area between two cultivation methods did not exist significantly differences because of the different transplanting density. At each growth stage of Liangyoupei 9, the plant nitrogen contain of OM wan higher than that of CK.