The Dynamic Changes of Grass Yield during the Growing Season in Tibetan Grasslands and the Sustainable Development Strategies

doi:10.11849/zrzyxb.20150449

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JOURNAL OF NATURAL RESOURCES ›› 2016, Vol. 31 ›› Issue (5) : 864-874. DOI: 10.11849/zrzyxb.20150449

The Dynamic Changes of Grass Yield during the Growing Season in Tibetan Grasslands and the Sustainable Development Strategies

WANG Tao², SHEN Wei-shou², LIN Nai-feng², OUYANG Yan²

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Abstract

Using actual survey data of grassland yield in Tibet and NDVI data sets, grass yield estimation model in Tibet was established, and then the characteristics of spatial and temporal variation of grassland yield in the grass growing season of Tibet during the period of 1987 to 2010 were analyzed quantitatively. Research showed that: during the period from 1987 to 2010, the growth rate of grassland yield in Naqu was the largest, which was 54%. However, the grassland yield in Lasa showed a decrease of 4%. Spatially, the growth of grass yield showed a trend of increase from northwest to southeast. The areas of increased grassland yield mainly located in the north-central Tibet, while in southern region there were mostly areas of grassland yield reduction. The area of grassland with increased yield accounted for 76.04% of the total grassland area. The area of grassland with reduced yield was only 23.96% of the total grassland area. The area of grassland with increased yield was significantly larger than that of grassland with reduced yield during the period from 1996 to 2006 in Tibet. In order to improve the grassland ecosystem and the grassland yield in Tibet, this article proposed a sustainable development strategy for Tibet grassland resource from the aspects of grassland utilization, spatial pattern, pest control, and ecological compensation for returning farmland to grassland.

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NDVI / sustainable development / the grass yield / Tibet

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WANG Tao, SHEN Wei-shou, LIN Nai-feng, OUYANG Yan. The Dynamic Changes of Grass Yield during the Growing Season in Tibetan Grasslands and the Sustainable Development Strategies[J]. JOURNAL OF NATURAL RESOURCES, 2016, 31(5): 864-874 https://doi.org/10.11849/zrzyxb.20150449

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Funding

Basic Research Foundation of National Commonwealth Research Institute; Research Innovation Program for College Graduates of Jiangsu Province, No.KYLX15_0869