水稻品种分蘖特性对产量影响分析

分析了不同肥力水平条件下水稻品种分蘖特性对产量的影响．结果表明，１）穗数型品种分蘖力强，高肥栽培时单茎增多、叶面积增大、茎秆细弱、倒伏、结实率降低，不适于高产再高产的要求；２）高肥栽培时，分蘖力偏弱但有效分蘖期长，在较长分蘖期内逐渐产生分蘖的品种类型，可协调穗数、穗粒数和结实率的矛盾，从而获得高产；３）具有矮秆、中等分蘖能力、有效分蘖期长、有效分蘖率高、叶长而直立的穗重型品种，可协调高肥栽培时群体和个体的矛盾，有望实现超高产．

A ANALYSIS OF EFFECT OF TILLERING CHARACTERS ON YIELDING AMONG RICE VARIETIES

The effect of tillering characters on yield among rice varieties was analysed under different fertility level. The results were: 1) The panicle number type showed the stronger tillering capacity. Increased individual culm had to result in greater fear area, weaker culm, lodging and lower filled spikelet percentage under higher fertility, so the panicle number type varieties were not suitable to breeding the super-high yield varieties in principle. 2) The varieties with the weaker tillering capacity and longer effective tillering stage could coordinate the contradiction among panicle number per plant, grain number per panicle and grain fertility to get high yield under high fertility. 3) It was also suggested that the super-high yield varietal type of rice should be the panicle weight type with semidwarf stalk, middle tillering capacity, long effective tillering stage, high effective tillering rate and big and upright leaves because such a rice variety could coordinate the contradiction between population and individual under high fertility.