【摘要】 河南省黄淮平原冬小麦分蘖消长的一般规律是:“两个盛期,一个高峰,越冬不停,集中死亡”.用白天平均温度积温（∑Tid）作生物学时间,代替自然天文时间,通过对本区冬小麦分蘖动态与气候生态关系的研究,黄淮平原冬小麦分蘖成穗随气温、土壤湿度等气候生态环境而变化的规律是:（1）最高群体以前:f=y_m/(1+e^a-b∑Tid·f_s·f_a-f_m （∑Tid<tg）（2）最高群体以后:f=(y_m-(y_m/(1+e^{-（a-b∑tid）-1}))·f_S·f_M-f_m （∑Tid≥tg）更多还原

【Abstract】 The present paper is a study on the regularities of the dynamic changes in the tillering and spike-forming of winter wheat and the quantitative relationship between these regularities and the ecoclimatic conditions inHuanghuai Plain of Henan province, based on a lot of field experiments carried out on various sites in that region. The main research result shows hat the changes in the tillering and spike-forming of the winter wheat in that region have a close relationship with the ecoclimatic factors such as temperature and soil moisture. Their quantitative relationships are as follows: (1) Before the maximum plant population:(2) After the maximum plant population:更多还原