近20年青藏高原东北部边坡地带垂穗披碱草物候变化——以甘肃合作为例  

The phenological variation of Elymus nutans during recent 20 years at the side slope conditions in the Northeast region of Qinghai-Xizang Plateau——A case study of Hezuo

作　　者：王建兵[1,2] 

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]甘南州气象局,甘肃合作747000

出　　处：《草业科学》2011年第10期1851-1854,共4页Pratacultural Science

摘　　要：通过利用垂穗披碱草(Elymus nutans)观测资料及同期的降水、气温、日照时数等地面观测气象资料,对近20年来青藏高原东北部边坡地带垂穗披碱草物候变化进行分析,发现高原边坡地带垂穗披碱草物候期除种子成熟期变化不明显外,返青、抽穗、开花和黄枯期均呈提前的趋势,特别是抽穗、开花期明显提前,提前趋势分别为每10年15.0和15.8d,分析认为,气候变暖是影响合作地区垂穗披碱草物候期提前的主要原因。近20年来,合作地区气候生长期有明显延长的趋势,延长趋势为每10年15d,同时垂穗披碱草的实际生长期也呈延长的趋势,延长趋势为每10年3.4d。Based on simultaneous data of Elymus nutans growth and meteorological factors, the phenologi- cal variation of E. nutans during recent 20 years at the side slope conditions in the Northeast region of Qinghai-Xizang Plateau was determined by the SPSS 13.0 statistical software in this study. This study showed that the phenological phase of E. nutans appeared earlier, in which the date of ear and bloom showed the obviously earlier by 1.50 d/a and 1.58 d/a due to global warming, and the maturate date of E. nutans seed did not change. The growing season in the Hezuo region during recent 20 years prolonged by 1.5 d/a, correspondingly, the growing season of E. nutans in Hezuo prolonged by 3.4 d/10a.

关 键 词：青藏高原东北部边坡地带 合作 垂穗披碱草 物候变化 

分 类 号：S543.9[农业科学—作物学] Q948.112.4[生物学—植物学]