Spatial Distribution of Water Deficit of Winter Wheat in Different Growing Stages and Spatial Variation of Precipitation in Henan Province
BAI Fangfang
QIAO Dongmei
PANG Ying
LIU Chuncheng
LU Hongfei
ZHAO Yulong
CHEN Siying
WANG Hezhou
Abstract：We calculated water deficit of winter wheat in Henan province by dividing its growing stage into early growth stage, tillering-wintering stage, and turning green-heading-maturity stage. Using the CROPWAT model and meteorological data measured from 1951—2013 at 20 sites across the province, we calculated the effective precipitation, water consumption and water deficit of the wheat at different growing stages. The spatial distribu-tion and variability of these factors were analyzed using ArcGIS 10.0, and the precipitation during different grow-ing stages was analyzed using the Mann-Kendall non parametric rank correlation test. The results for different growing seasons can be summarized as follows.①The effective precipitation decreased from southeast to north-west, the water consumption decreased from northwest to southeast except in the tillering-wintering stage, and the water deficit decreased from northwest to southeast.②The average effective precipitation during whole grow-ing stage, early growth stage, tillering-wintering stage and turning green-heading-maturity stage was 201.80 mm, 25.04 mm, 45.91 mm, 130.85 mm respectively, the associated average water consumptions were 432.52 mm, 39.23 mm,104.22 mm, 289.07 mm respectively, and the associated average crop water deficits were 230.72 mm,14.19 mm, 58.31 mm, 158.22 mm respectively. The Mann-Kendall test results showed that the precipitation de-creased in whole growing stage, increased in early growth stage, decreased in the tillering-wintering stage and the turning green-heading-maturity stage. The precipitation in different growth stages changed with UF. In summary, water at the turning green-heading-maturity stage is in deficit in north of the province including Anyang, Xinx-iang, but sufficient in the south including Zhumadian and Xinyang.
Keywords：winter wheateffective precipitationwater consumptioncrop water deficitprecipitationdifferent growth stagesMann-Kendall
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 100-108 )