青藏高原东北部边坡地带气候变化及对牧草生长的影响  

Impacts of Climate Change on the Pasture Grass in Border Area at the North-East of Qinghai-Xizang Plateau

作　　者：王建兵[1,2] 杨文杰 

机构地区：[1]中国气象局兰州干旱气象研究所甘肃省干旱气候变化与减灾重点实验室,甘肃兰州730020 [2]甘肃省甘南藏族自治州气象局,甘肃合作747000

出　　处：《安徽农业科学》2010年第26期14535-14537,共3页Journal of Anhui Agricultural Sciences

摘　　要：通过利用位于青藏高原东北部边坡地带合作农气观测站的牧草观测资料及降水、气温和积温等地面观测气象资料,分析了气候变化对青藏高原东北部边坡地带牧草生长的影响,发现气候变化导致位于高原边坡地带的合作牧草生长期有明显延长的趋势。合作地区牧草生长期延长的主要原因是返青期提前,趋势提前15.5d/10a。由于秋季降水量增多和初春气温上升导致合作牧草返青期提前,特别在20世纪90年代中期后,合作牧草返青期出现了明显提前的趋势。合作牧草黄枯期也呈提前的趋势,趋势提前5.5d/10a,合作牧草黄枯期提前的主要原因是9月下旬至10月上旬气温升高,夏季降水量减少。Based on the data of herbage growing and meteorological factors of Hezuo,the impacts of climate change on the pasture grass in Border Area at the North-East of Qinghai-Xizang Plateau were studied on this paper.The results showed that the impaction of climate change on the pasture grass is the growing season extended.The main reason of this fact is the herbage recovery date is earlier in Hezuo region.The herbage recovery date of Hezuo has a earlier trend with the tendency ratio of 15.5 d/10a,the increasing of autumn precipitation and rising of early spring temperature is The main reason of the herbage recovery earlier in the Hezuo region,the herbage recovery date has a obvious earlier trend than before after the middle of 1990s.the herbage withered and yellow date has a obvious earlier trend with the tendency ratio of 5.5 d/10a in Hezuo region.The rising of temperature at end of September and early of October,the reducing of summer precipitation are the main reason to the herbage withered and yellow earlier in Hezuo region.

关 键 词：边坡地带 牧草 气候变化 影响 青藏高原 

分 类 号：P462.3[天文地球—大气科学及气象学]