水稻自动调节与产量

Rice Automatic Regulation and Yield

摘要:

在密、稀、超稀和极端稀植群体中,初步研究了水稻群体条件下的个体自动调节与分蘖生长、干物质生产和产量形成的关系。研究结果表明,水稻在一定的密度范围内具有很强的调节能力,生育初期的调节能力较小,随着群体系统的不断发展调节能力逐步增强。提高光合势和净同化率有利于增加产量。施肥量、密度与产量分别呈显著水平,二者互作效应不显著。群体的产量因素可相互调节,稀植条件下单位面积穗数减少,千粒重和成熟度增高,克服了密植条件下千粒重和成熟度低的不利影响。

Abstract:

This paper preliminary studied relations on the rice individual automatic regulation and tillering growth dry matter production and yield formed by density,sparse,super sparse,extreme sparse planting. The results showed that the rice had strong regulative ability within the limits of density,among them,ability of regulation is minor in the early days of growth,regulative ability was strengthened with developing of colony system,improving photosynthetic power and net assimilation ratio advantageous to increase yield.Quantity of applying fertilizer,density and yield reached remarkable level,its mutual effect is not remarkable.Yield actor of colony can mutually regulate,under sparse planting,reducing the ear of grain quantity in unit area,improving thousand grain weight and mature degree,overcoming disadvantage effect on low thousand grain weight and mature degree under sparse plant condition.