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LI Xia-zi1,2, HAN Guo-dong1**
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Abstract: Studying the effects of regional climate change on the grassland grasses growth is of significance for guiding local farming and animal husbandry production. Based on the 50 years observation data from 34 meteorological stations and the 27 years grass phenological data from three animal husbandry meteorological experimental stations in eastern Inner Mongolia grasslands, this paper studied the effects of climate change on the growth season of dominant grasses in the grasslands. In eastern Inner Mongolia, the mean air temperature in spring, summer, and autumn had a significant rising trend. The precipitation in spring had a slight increasing trend, but that in other seasons presented a decreasing trend. Climatic warming and drying trend was obvious. The rising of the air temperature in spring promoted the advance of the date of turning green. With an increase of 1 ℃, the turning green date of Leymus chinensis and Stipa baicalensis in Evenk and Ergun advanced 1.7-1.9 days. The rising of the air temperature both in summer and in autumn delayed the date of yellowing and withering. With an increase of 1 ℃, the yellowing and withering date of L. chinensis and S. baicalensis in Ergun postponed 2.0-2.3 days. With an increase of 1 ℃ in summer and autumn, the growth season of S. baicalensis in Ergun prolonged 3.3-3.7 days. With an increase of 1 ℃ in autumn, the growth season of Agropyron cristatum in Bayaertuhushuo shortened 2.8 days.
Key words: material flow analysis, economic-environment system, Johansen cointegration test, impulse response function, variance decomposition analysis.
LI Xia-zi1,2, HAN Guo-dong1**. Response of grass growing season to meteorological change in eastern Inner Mongolia grassland.[J]. cje.
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URL: http://www.cje.net.cn/EN/abstract/abstract20350.shtml
http://www.cje.net.cn/EN/Y2013/V32/I4/987