A Study on the Relationship Between the Dynamic in the Tillering and Spike-forming of Winter Wheat and the Ecoclimatie Conditions in Huanghuai Plain

doi:10.3321/j.issn:1000-7091.1990.01.001

Abstract

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 in Huanghuai 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 hemperature and soil moisture, Their quantitative relationships are as follows:(1)Before the maximum plant population:f=y_m/(1+e^a-b∑Tid·f_s·f_a-f_m （∑Tid<tg）(1)After the maximum plant population:f=(y_m-(y_m/(1+e^{-（a-b∑tid）^-1}))·f_S·f_M-f_m （∑Tid≥tg）

Key words: Wheat, Dynamic changes of plant colony, Mean temperature of daytime, Accumulated temperature, Biological time, Dynamic simulation

Wang Yongqin, Chen Yunhua. A Study on the Relationship Between the Dynamic in the Tillering and Spike-forming of Winter Wheat and the Ecoclimatie Conditions in Huanghuai Plain[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1990, 5(1): 1-9. doi: 10.3321/j.issn:1000-7091.1990.01.001.

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