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探讨NurturingNurturingtheLandthroughtheLand论文发表网

论文预读:cessive grazing in the following decades, however, led to severe soil erosion. By the year 2000, shifting sand dunes had expanded from two percent to 70 percent of the local territory, creating a dust bowl that from time to time engulfed the capital.  Reforestation is an established remedy for san探讨NurturingNurturingtheLandthroughtheLand论文发表网

  AMONG the many superlative descriptions of China, one of the least desirable is that of being among the countries hardest hit by desertification. As of the end of 2009, arid, semi-arid and sandy land accounted for a staggering 45.36 percent of Chinese territory. Many of the initiatives devised and carried out to tackle the problem have yielded encouraging results. One is the program spearheaded by Jiang Gaoming, a researcher at the Institute of Botany of the Chinese Academy of Sciences. A case study of his desertification control efforts in Otindag Sandland in Inner Mongolia Autonomous Region appears in the sixth edition of the U.S. textbook Geology and the Environment, and has received extensive international

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media coverage.

  In 2000, Jiang and his team established an enclave at the heart of Onqin Daga housing his bio-system restoration experiment. Today, what was formerly a swath of parched drab is a lush pastureland.

  From Afforestation to Natural Rehabilitation

  To counteract the growingly frequent and intense sandstorms that hit Beijing and Tianjin in the late 1990s, China launched a project in 2000 to address ecological degradation in the source areas. That year the Chinese Academy of Sciences added its weight to the mission through its experiment to revive the degraded eco-system in the interspersed crop fields and grazing lands of Onqin Daga and regions north of Beijing. Jiang Gaoming and his team were assigned a plot of 26.8 square kilometers in Bayan Huxu at the heart of Onqin Daga, 180 kilometers north of Beijing.

  Onqin Daga is one of the four largest sand lands in China. The others comprise Horqin, Mau Us and Hulun Buir, all in North China’s Inner Mongolia Autonomous Region. Covering 53,000 square kilometers, it is less than 200 kilometers from Beijing as the crow flies. Back in the 1960s, this largely lifeless terrain was blanketed knee-deep in grass in the warmer seasons. Excessive grazing in the following decades, however, led to severe soil erosion. By the year 2000, shifting sand dunes had expanded from two percent to 70 percent of the local territory, creating a dust bowl that from time to time engulfed the capital.

  Reforestation is an established remedy for sandstorms that both the government and academic circles embrace. When Jiang Gaoming and his team first arrived at Bayan Huxu, they painstakingly planted tree seedlings, only to see them wither and eventually die the next year.   During one get-together with local residents, someone suggested: “If the area is closed off, grass will sprout plentifully of its own accord.” This observation inspired Jiang. But then the question arose: “Where will locals graze their herds if this area is enclosed?” Jiang hit on the compromise solution of setting aside a 67-hectare, or 2.5 percent, strip of the total area for experimental cultivation of a high-yield species of fodder grass. To boost output, the research team dug wells and set up power lines, and paved roads to facilitate irrigation and plantation. The rest of the land was fenced off as a grazing moratorium. By the year 2008, green coverage in the region had soared to an average 60 percent, and in some places to 100 percent. A renaissance of fauna accompanied this flora revival. The young steppe is now the habitat of wolves, foxes, rabbits, wild goats and a number of wild fowls such as swans. The formerly barren terrain has come back to life

论文随机片段:f 26.8 square kilometers in Bayan Huxu at the heart of Onqin Daga, 180 kilometers north of Beijing.  Onqin Daga is one of the four largest sand lands in China. The others comprise Horqin, Mau Us and Hulun Buir, all in North China’s Inner Mongolia Autonomous Region. Covering 53,000 square kilomete