Water Requirement Characteristics and Meteorological Impact Factors of Winter Wheat in Shijiazhuang
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
Based on the meteorological data of 9 stations in Shijiazhuang, the water requirements of winter wheat at different growth stages from 1964 to 2012 are calculated by using the PenmanMonteith equation and crop coefficient equation, and the water requirements and the influence factors in each growth stage are analyzed by using the linear trend, variation coefficients, 5years moving average, Morlet wave, and Pearson coefficient methods. The results show that the water requirement trends at various stages generally declined obviously: decline more obviously at the stages of sowing to overwintering, heading to ripening, and the whole growth period from 1965 to 1987, rose obviously from 1988 to 2012 at the stage of returning green to elongation, and varied unnoticeably at the other growth stages and in the whole growth period. There was oscillation of over 4year period at various growth stages in 48 years; the spatial distribution of the water requirement increased from northeast to southwest, and the trend of water requirement decreased from north to south in the whole growth period and various growth stages. The correlation analysis indicates that sunshine is positively correlated to the water requirement of the winter wheat most obviously, and the humidity is negatively correlated with that most obviously at growth stages.
Keywords:
Project Supported:
Clc Number:
You are thevisitors
Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.