Spatial Temporal Variation of Climate Resources during Rape Growing in Hunan
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Abstract:
By means of the statistical method, using the data of air temperature, sunshine duration, and precipitation from 1962 to 2010 of 96 weather stations and the data of rape growth from 1991 to 2010 of 5 agrometeorological stations in Hunan Province, the spatial distributions and inter annual variations of agrometeorological elements closely correlated to different growth stages of rape are analyzed.Results show that the whole growth period of rape has no significant differences between regions, but the accumulated temperature of ≥0 ℃ during the rape growth period has obvious regional difference.The main influencing meteorological factors during the rape growth period are air temperature and sunshine duration, which vary at different growth stages.The climate resources are unevenly distributed spatially, and the inter annual variation of climate resources differs at different growth stages.The accumulated temperatures before wintering and pod development periods trend to increase; the numbers of days of 〖WTBX〗T 〖WTBZ〗≤0 ℃ or 〖WTBX〗T 〖WTBZ〗≤－3 ℃in the wintering period trend to decrease; the sunshine duration during the stem elongation period trends to decrease; the sunshine duration during the flowering and pod development periods show a trend of increase. Overall, the climatic resources and variation trends during the rapes growth period are advantageous to rape planting.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.