青藏高原高寒草原优势植物西北针茅对降水波动的响应

发布时间：2018-07-06 17:57

本文选题：气候变化 + 高寒草原　；参考：《北方园艺》2017年18期

【摘要】：通过分析农业气象站固定样地观察数据,研究了降水波动对高寒草原优势植物西北针茅和杂类草的影响。结果表明:西北针茅的丛数及其生产力随降水量增加而降低。相反,杂类草生产力随降水量增加而增加。西北针茅的丛数和生产力与土壤0~20cm温度呈显著负相关性;而杂类草的生产力与0~20cm土壤温度呈正相关。年降水的波动对西北针茅丛数及其生产力以及杂类草,特别是在降水极端偏低年份西北针茅的丛数及其生产力迅速增加,而杂类草生产力极低。这表明气候变化中的降水量年际波动是影响高寒草原优势植物西北针茅和杂类草生产力的重要驱动因素。
[Abstract]:The effects of precipitation fluctuation on the dominant plants in the alpine steppe were studied by analyzing the observation data of the fixed sample of agricultural meteorological station. The results showed that the number of clusters and their productivity decreased with the increase of precipitation. On the contrary, the productivity of hybrid grasses increased with the increase of precipitation. There was a significant negative correlation between soil 0~20cm temperature and soil 0~20cm temperature, but a positive correlation between the productivity of hybrid grasses and 0~20cm soil temperature. The fluctuation of annual precipitation increases rapidly to the number and productivity of Stipa arundinacea and its productivity, especially in extremely low precipitation years, but the productivity of hybrid grass is very low. It is suggested that the interannual fluctuation of precipitation in climate change is an important driving factor for the productivity of Stipa nativa and hybrid grasses in alpine steppe.
【作者单位】：遵义师范学院生物与农业科技学院;
【基金】：国家自然科学基金资助项目(31660106) 贵州省千层次创新型人才资助项目(遵市科合人才[2016]4号) 贵州省教育厅资助项目(黔教合KY字[2014]260) 遵义师范学院博士基金资助项目(遵师BS[2014]06,BS[2014]07号) 国家“十二五”科技支撑计划资助项目(2012BAH31B03)
【分类号】：S812

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