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Net Primary Productivity of Grassland Resources Monitoring Based on Remote Sensing Data in Qinghai Province

LI Lu-zi

Open publisher page 1 citations

Abstract

With research on grassland light use efficiency and environment impacting factors in special regions,the NPP model of grassland based on light use efficiency is built in the paper.The spatio-temporal variations of FPAR(Fraction of Photosynthetically Active Radiation),light use efficiency and NPP for grassland in 2006 in Qinghai Province are simulated and analyzed.The result shows that the mean value of grassland NPP in 2006 in Qinghai Province is 173.28 g(/ m2.a).The area with higher grassland NPP values appear in the south-east,the south and areas around the Qinghai Lake of Qinghai Province.NPP for various grassland types is different.The mean NPP in the unit area of dense grassland is 193.82 g(/ m2.a),in the middle density grassland is 157.14 g(/ m2.a)and in sparse grassland is 121.08 g(/ m2.a).

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What this paper is about

With research on grassland light use efficiency and environment impacting factors in special regions,the NPP model of grassland based on light use efficiency is built in the paper.The spatio-temporal variations of FPAR(Fraction of Photosynthetically Active Radiation),light use efficiency and NPP for grassland in 2006 in Qinghai Province are simulated and analyzed.The result shows that the mean value of grassland NPP in 2006 in Qinghai Province is 173.28 g(/ m2.a).The area with higher grassland NPP values appear in the south-east,the south and areas around the Qinghai Lake of Qinghai Province.NPP for various grassland types is different.The mean NPP in the unit area of dense grassland is 193.82 g(/ m2.a),in the middle density grassland is 157.14 g(/ m2.a)and in sparse grassland is 121.08 g(/ m2.a).

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Available abstract

With research on grassland light use efficiency and environment impacting factors in special regions,the NPP model of grassland based on light use efficiency is built in the paper.The spatio-temporal variations of FPAR(Fraction of Photosynthetically Active Radiation),light use efficiency and NPP for grassland in 2006 in Qinghai Province are simulated and analyzed.The result shows that the mean value of grassland NPP in 2006 in Qinghai Province is 173.28 g(/ m2.a).The area with higher grassland NPP values appear in the south-east,the south and areas around the Qinghai Lake of Qinghai Province.NPP for various grassland types is different.The mean NPP in the unit area of dense grassland is 193.82 g(/ m2.a),in the middle density grassland is 157.14 g(/ m2.a)and in sparse grassland is 121.08 g(/ m2.a).

Key concepts: Grassland, Photosynthetically active radiation, Primary production, Environmental science, Productivity, Forestry, Physical geography, Geography

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