吉林省春玉米土地生产潜力时空变化及其与气候因子的关系
发布时间:2018-10-13 10:54
【摘要】:利用1961~2015年气象观测资料、春玉米生长发育及产量资料和土壤数据,计算了吉林省不同区域的春玉米土地生产潜力,并分析其时空变化特征及主要的气候影响因子。结果表明:吉林省各区域的太阳辐射均呈显著减小趋势(P0.05),≥10℃有效积温均呈极显著的增加趋势(P0.01),降水量变化趋势不显著。太阳辐射和≥10℃有效积温呈由西向东逐渐降低趋势,降水量呈由西向东逐渐增加趋势。春玉米土地生产潜力由西向东呈低-高-低的趋势分布。西部和中部区域土地生产潜力呈减小趋势,东部区域土地生产潜力呈上增加趋势,但变化趋势均不显著。西部、中部和东部区域土地生产潜力平均值分别为7544.5、12346.4和11878.0 kg hm~(-2)。土地生产潜力利用率由西向东逐渐降低,西部、中部和东部区域利用率平均值分别为74.2%、61.1%和47.5%。降水量是西部和中部土地生产潜力的主要气候影响因子,≥10℃有效积温是东部土地生产潜力的主要气候影响因子。
[Abstract]:Based on the meteorological observation data from 1961 to 2015, the growth and yield data of spring maize and soil data, the land production potential of spring maize in different areas of Jilin Province was calculated, and its spatio-temporal variation characteristics and main climatic factors were analyzed. The results showed that solar radiation decreased significantly in all regions of Jilin province (P0.05), and the effective accumulated temperature 鈮,
本文编号:2268353
[Abstract]:Based on the meteorological observation data from 1961 to 2015, the growth and yield data of spring maize and soil data, the land production potential of spring maize in different areas of Jilin Province was calculated, and its spatio-temporal variation characteristics and main climatic factors were analyzed. The results showed that solar radiation decreased significantly in all regions of Jilin province (P0.05), and the effective accumulated temperature 鈮,
本文编号:2268353
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