【摘要】：利用1961~2015年氣象觀測(cè)資料、春玉米生長(zhǎng)發(fā)育及產(chǎn)量資料和土壤數(shù)據(jù),計(jì)算了吉林省不同區(qū)域的春玉米土地生產(chǎn)潛力,并分析其時(shí)空變化特征及主要的氣候影響因子。結(jié)果表明:吉林省各區(qū)域的太陽(yáng)輻射均呈顯著減小趨勢(shì)(P0.05),≥10℃有效積溫均呈極顯著的增加趨勢(shì)(P0.01),降水量變化趨勢(shì)不顯著。太陽(yáng)輻射和≥10℃有效積溫呈由西向東逐漸降低趨勢(shì),降水量呈由西向東逐漸增加趨勢(shì)。春玉米土地生產(chǎn)潛力由西向東呈低-高-低的趨勢(shì)分布。西部和中部區(qū)域土地生產(chǎn)潛力呈減小趨勢(shì),東部區(qū)域土地生產(chǎn)潛力呈上增加趨勢(shì),但變化趨勢(shì)均不顯著。西部、中部和東部區(qū)域土地生產(chǎn)潛力平均值分別為7544.5、12346.4和11878.0 kg hm~(-2)。土地生產(chǎn)潛力利用率由西向東逐漸降低,西部、中部和東部區(qū)域利用率平均值分別為74.2%、61.1%和47.5%。降水量是西部和中部土地生產(chǎn)潛力的主要?dú)夂蛴绊懸蜃?≥10℃有效積溫是東部土地生產(chǎn)潛力的主要?dú)夂蛴绊懸蜃印?br/>[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，

本文編號(hào)：2268353