水稻大养稀栽培分蘖发育特性的研究

Study on Tillering Development Characteristic of Thin Planting of Rice

在一般情况下，无论什么品种，其有效分蘖终止期表现出插秧越密越早，越稀越晚．同等密度的普通栽培（３０ｃｍ×１３．２ｃｍ）中，高秆大穗型品种有效分蘖终止期比多穗型品种晚，穴基本苗越少越明显．所以，加大株行距的超稀植（大养稀栽培），有利于延迟有效分蘖终止期，同时分蘖增产潜力能够得到有效利用，使个体生产力大大提高，分蘖节位明显降低，且成蘖率明显提高，从而确保高产所需的粒数指标，提高成熟度，以期达到低投入、高产出的目的．

The thin planting could delay end of active tillering ,make full use of increasing potentiality of yield, improve individual productivity greatly,lower tillering place, improve the rate of tillering .So it assure grain index for high yield, improve grade of maturity. It was one of the good cultivating way that low input and high output.