Effects of Temperature and Humidity on Cotton Seed Germination

doi:10.11923/j.issn.2095-4050.cjas2021-0176

Abstract

Abstract:

In order to explore the effects of temperature and humidity on cotton seed germination, and provide theoretic guidance for suitable sowing date of cotton, the authors took cotton seed as material, conducted an indoor temperature and humidity 2-factor germination experiment, and recorded and calculated germination rate every day. The active period of cotton seed germination was from day 1 to day 4, and the cumulative germination rate was relatively high at 25℃ and 30℃, and humidity of 20% and 40%. Mathematical method was used to predict the suitable temperature and humidity range for cotton seed germination, and the similar conclusion was obtained. During cotton seed germination, the suitable humidity is 15%-40%, the suitable temperature is around 26℃, so the sowing time and method should be arranged according to actual situation.

Key words: cotton, seed, temperature, humidity, germination rate

CLC Number:

S562

XU Min, LI Jinglin, YE Fumin, ZHU He, WANG Zisheng. Effects of Temperature and Humidity on Cotton Seed Germination[J]. Journal of Agriculture, 2022, 12(10): 10-14.

Figures/Tables 8

References 17

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	逐日发芽率
天数	-0.467^**
温度	0.116
湿度	-0.207^**

	逐日发芽率
天数	-0.467^**
温度	0.116
湿度	-0.207^**

因子	回归模型	R²	p	边际效应值
天数	y=0.615x²-7.87x+26.37	0.984	0.0002	6.39 d
温度	y=-0.039x²+2.078x-16.301	0.986	0.0002	26.64℃
湿度	y=-0.304x²+8.289x+12.05	0.986	0.0141	13.63%

因子	回归模型	R²	p	边际效应值
天数	y=0.615x²-7.87x+26.37	0.984	0.0002	6.39 d
温度	y=-0.039x²+2.078x-16.301	0.986	0.0002	26.64℃
湿度	y=-0.304x²+8.289x+12.05	0.986	0.0141	13.63%

因子		Logistic模型	R²	P
温度	10℃	Y=1.0226/[1+906.8331exp(-1.4015x)]	0.9881	0.0002
	15℃	Y=44.8544/[1+105.1550exp(-1.5002x)]	0.9907	0.0000
	20℃	Y=59.5187/[1+7.3490exp(-1.0300x)]	0.9697	0.0009
	25℃	Y=78.7989/[1+21.9416exp(-1.6514x)]	0.9963	0.0000
	30℃	Y=70.5887/[1+26.7808exp(-3.9777x)]	0.9637	0.0003
	35℃	Y=50.6879/[1+143.4609exp(-6.0530x)]	0.9943	0.0000
	40℃	Y=32.4062/[1+25.9242exp(-3.2530x)]	0.9964	0.0000
湿度	20%	Y=71.2041/[1+6.4984exp(-1.5124x)]	0.9577	0.0004
	40%	Y=60.1485/[1+8.2572exp(-1.4673x)]	0.9777	0.0001
	60%	Y=45.2756/[1+8.6773exp(-1.2676x)]	0.9795	0.0001
	80%	Y=40.9539/[1+9.3906exp(-1.1185x)]	0.9796	0.0001
	100%	Y=26.6393/[1+6.3124exp(-1.0432x)]	0.9610	0.0003
平均		Y=48.5422/[1+7.5621exp(-1.3151x)]	0.9737	0.0001