水稻植株生长模型的研究

A Rice Growth Model

研究了早稻茎数消长和叶龄增长，以及叶面积增长和抽穗率的变化，分析了叶龄与积温、氮肥水平及茎数之间的关系，以及不同类型品种间分蘖力的差异，分别组建了叶龄与积温、茎数的数学模型，不同施氮量与茎数消长的数学模型，以及叶面积增长和始穗率数学模型。结果表明，早稻常规品种的茎数消长主要与叶龄增长的关系密切，同时受品种的分蘖力潜能、总叶片数以及不同施氮量的影响，叶龄增长主要与积温有关，而与施氮量关系不明显。

The relationships of leaf age to accumulated temperature,level of nitrogen fertilizer,and the number of til lering in rice were studied.The difference of tillering ability among different varieties was also studied and analysed.The mathematical models for the above relationships,and the model for increase of rice leaf area and earing percentage were set up.The results showed that the number of tillering was related to leaf age,and tillering ability,total numbers of rice leaf age and nitrogen fertilizer had effects on the number of tillering.Rice leaf age was correlated withaccumulatcd temperature.The effect of nitrogen fertilizer was not significant on leaf age.The ricegrowth model may be used as a guide to rice management and integrated pest management model.