Impact of Climate Change onPasture Production Potential in Inner Mongolia

doi:10.11924/j.issn.1000-6850.casb17120012

Abstract

Abstract: To study the impact of climate change on pasture production potential is important for making full use of climate resources, tackling climate change and increasing the potential. Based on daily meteorological data of 30 meteorological stations in Inner Mongolia from 1960 to 2010 and the grassland observation data of 8 pasture observatories from 1983 to 2009, climate and pasture production potential characteristics of three types of pasture (meadow steppe, typical grassland and desert steppe) were analyzed by climate linear tendency model and Miami model. The results showed that grassland temperature increased and precipitation decreased in Inner Mongolia in recent 50 years. Climate warm drying trend was significant and worsening. The climate production potential of pasture gradually decreased from northeast to southwest as meadow grassland> typical grassland> desert grassland, the potential was 4490-6180, 4100-6000 and 420-5000 kg/hm2, respectively; the utilization rate of climate resources was meadow grassland> typical grassland> desert steppe, which was 39.2%-79.0%, 28.9%-66.3% and 21.2%-38.7%, respectively, still had a development potential. The effect of precipitation on the climate production potential of pasture was positive while the effect of temperature on that was different among different pasture types, temperature had positive effect on the potential of meadow grassland but negative effect on the potential of typical grassland and desert grassland in the southern region, and the synergistic effect of temperature and precipitation was observed on climate production potential of pasture in Inner Mongolia grassland. In general, precipitation is the main climatic factor restricting the climate production potential of pasture.

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