JOURNAL OF NATURAL RESOURCES ›› 2007, Vol. 22 ›› Issue (4): 640-648,675-676.doi: 10.11849/zrzyxb.2007.04.014

• Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS • Previous Articles     Next Articles

The Applied Research of Remote Sensing Material in Qinghai Grassland Resources Monitoring and Appraisal

YAN Liang-dong1, YIN Qing-jun3, ZHANG Hai-zhen2, MIN Qing-wen4, WU Su-xia1, FU Yang1   

  1. 1. Qinghai Institute of Meteorological Science, Xining 810008, China;
    2. Qinghai Meteorological Bureau, Xining 810008, China;
    3. Department of Geography, Qinghai Normal University, Xining 810001, China;
    4. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
  • Received:2006-02-09 Revised:2007-04-04 Online:2007-08-25 Published:2007-08-25

Abstract: Using the vegetation index (NDVI) monitored by EOS/MODIS,NOAA/AVHRR satellites, and the grass yield and vegetation coverage determined on the ground,and according to the principle of remote sensing monitoring,combining rearch work on key spots with that in other areas,the relational patterns between vegetation index and grazing yield,vegetation index and vegetation coverage were established.And the method of the grassland resources monitored by remote sensing and their appraisal was produced.The results showed that in 2004 the grassland resources of Qinghai Province decreased gradually from the southeast to the northwest,the area with the highest yield was in the south of Huangnan Prefecture and the southeast of Golog Prefecture,and the area with the lowest yield was in the northwest of Qaidam Basin.The distributing status of natural grassland resources for the last 20 years didn’t change,but the productivity of the grassland was dropping gradually,and the grassland resources were reducing year by year,and in Golog alone the average grass yield dropped by 4.04% compared with that of 1986,with a total grass yield reduction of 851000t and the reduction of theoretical number of animals carried 631100 sheep.The warming and drying climatic changing trend was the main reason for the descending and degenerating of the natural grassland productivity in Qinghai Province.

Key words: Qinghai Province, grassland resources, remote sensing monitoring, appraisal

CLC Number: 

  • 5812.8