摘要
本文在裂区设计田间试验资料基础上,采用逐步回归分析方法,研究了大田自然条件下影响棉花生育的关键气候生态因子及其作用方式.结果表明,温度是影响棉花生育进程的首要生态因子,日照时数和水分因子的影响次之.在三叶期以前主要受土壤温度因子的影响,三叶期以后则主要受日均气温的影响;在花铃期日照时数为主导因子.且极端温度也是影响棉花生育进程的重要因子.建立了主要生育阶段的数学模型,出苗期为:D_1=1/0.1755-0.0122X_1-0.0035X_2或D_1=62.34/X_1-12.49出苗后各生育阶段为:D_i=b_i+sum from j=1(b_1X_1),
Based on the data of field experiments by split-plot experimental design, the effect of key eco-climatic factors on the growth and development of early Cotton 'Jing 6' under natural field conditions and the effect way were studied by progressive regression method.Results showed. The main eco-climatic factors affecting the process of growth and development of cotton are temperature, length of sunshine and soil moisture. Temperature is the most important factor. The main factorsare soil temperature before the third leaf, daily mean air temperature after the third leaf and length of sunshine in the boiling period. Extreme air temperature is also an important factor. The nonlinear model between the number of days of emergence (D 1 )and the soil mean temperature (X1 ) and soil moisture (X2 )is:D1 =1/(0.1755-0.0122X1-0.0035X2) or D1 =62.34/ (X1-12.49) The linear model of each growing period after emergence is:Di = bi +∑bj Xj
出处
《华北农学报》
CSCD
北大核心
1990年第1期57-63,共7页
Acta Agriculturae Boreali-Sinica
关键词
棉花
生育阶段
湿度
水分
日照
Cotton
The period of growth and development
Temperature
Soil moisture
Length of sunshine
Film-mulching
Mathematical model
