四川盆地杂交水稻茎蘖动态及气象模拟模型

利用四川盆地杂交水稻地理分期播种试验资料和有关大田生产观测资料，较为详细地研究了四川盆地杂交水稻本田茎蘖动态特征、区域差异以及不同密、肥和气象条件对茎蘖动态的影响，分别建立了各因素的影响关系模型。在此基础上，依据具有时迟效应的Logistie模型，分别利用温度、日照时数的累积代替Logistic模型的时间变量对其进行改进，再结合栽培因子和气象影响模型构建综合模拟模型。其结果表明综合模拟模型较之单一的时迟效应的Logistic模拟模型具有更高的精度和更强的适应性，可广泛适用于四川盆地杂交水稻生产决策和本田茎蘖动态的调控中，促进杂交水稻的持续高产。为便于应用，还设计了一套杂交水稻茎蘖动态综合模拟预测系统——SCHRSDFS，在生产中应用，收到较显著的社会经济效益。

STEM DENSITY DYNAMICS OF HIBRID RICE PRODUCTION IN SICHUAN BASIN AND SIMULATED METEOROLOGICAL MODELS FOR IT

A study of the stem density dynamics in paddy fields of Sichuan Basin was conducted based on the experimental data of different sowing dates and the relevant observation datai and simulated models were established concerning the effects of sowing rates, fertilization and meteorological factors on stem density. The Logistic model with time - lag effect was improved by substituting accumulate temperature and sun - times for variable t in it. Then a comprehensive model was established which combined planting factors with the meteorological model, which was shown to be more accurate and widely adaptable than the stem density. It is recommended for popularization in hybrid rice cultivation in Sichuan.