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)
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:
出处
《华北农学报》
CSCD
北大核心
1990年第1期1-9,共9页
Acta Agriculturae Boreali-Sinica
关键词
冬小麦
分蘖成穗
气候
生态环境
Wheat
Dynamic changes of plant colony
Mean temperature of daytime
Accumulated temperature
Biological time
Dynamic simulation
