气候变暖对甘肃农业的影响
收稿日期: 2004-12-01
修回日期: 2005-01-01
网络出版日期: 2005-03-25
基金资助
甘肃省科技攻关计划“甘肃干旱生态环境对全球气候变暖的响应及减灾技术的研究”(2GS042-A44-017)资助。
Impact of Climate Warming on Agriculture in Gansu Province
Received date: 2004-12-01
Revised date: 2005-01-01
Online published: 2005-03-25
刘德祥,董安祥,薛万孝,张平兰,费晓玲 . 气候变暖对甘肃农业的影响[J]. 地理科学进展, 2005 , 24(2) : 49 -58 . DOI: 10.11820/dlkxjz.2005.02.006
Based on temperatures of 171 observations from 1961 to 2003 in Gansu province, the year mean temperature, highest temperature, lowest temperature, accumulated temperature above 0℃,10℃, and negative accumulated temperature beneath 0℃ were collected to analyze. The results showed that year mean temperature of 1987~2003 was significantly higher than that of 1961~1986; especially the lowest temperature increment appeared markedly. The lowest temperature rising played a main effect on climate warming in Gansu province. Climate warming was more clearly in winter than in summer. The accumulated negative temperature reduced obviously. As the trends of climate changing has shown warming since late 1980s in Gansu province,thermal resource is increased, planting areas of heliophilous plants are expanded, the northern planting boundary of crop spreads further to north and it is beneficial to winter and spring animal. However, because of lack of water resources, Impacts of climate warming on agriculture is more negative then positive.
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