Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 526.
  1. Library Resource
    Articles et Livres
    mars, 2015
    Chine

    The purpose of this study is to discover the changes of household employment structure and of business range for those graziers who have to turn to rear sheep in pens as the background of the policy of returning farmland into forest and grassland. The results of this study are as follows: First, after turning to rear sheep in pens, though the graziers have saved time for other work, the time for feeding has increased to the whole year. In addition, the policy that encourages the rearing of sheep in pens has brought about a growing number of sheep graziers.

  2. Library Resource
    Articles et Livres
    avril, 2010
    Chine

    Based on the climatic data and other statistics of climatic data of 54 meteorological stations from 1956 to 2005 in Liangning Province, the annual and seasonal light, heat and water and the like major elements of climatic resources are diagnosed and analyzed by using the method of linear climate trend rate. The results show that warming trend is 0.25℃/10a , the precipitation decrease gradually by 2.2mm/a and the decreasing trend of solar radiation and hours of sunshine is not dramatic.

  3. Library Resource
    Articles et Livres
    décembre, 2016
    Viet Nam, Laos, Cambodge, Chine

    After reviewing the main causes and effects of land degradation and erosion in the uplands of mainland Southeast Asia, this chapter presents several case studies of recent land-use changes governed by economic, political and institutional transitions, the expansion of teak and rubber tree plantations in northern Laos and southwest China, respectively, and of monocropping coffee in the Central Highlands of Viet Nam. We explain how these environmental disturbances are altering water and soil resources across different geographic scales, from the agricultural plot to the headwater catchment.

  4. Library Resource
    Articles et Livres
    décembre, 2007
    États-Unis d'Amérique, Japon, Chine, Inde, Fédération de Russie

    Much is reported about the destruction of natural forests and the consequences for global warming, while on the other hand, exotic plantations in some regions struggle to gain public acceptance. The earth's population is projected to rise to around 9 billion by 2050, with a concomitant increase in demand for forest products. Inevitably, forests in general, and managed forest in particular, will be called on to provide an ever-increasing proportion of local supplies and the international wood trade.

  5. Library Resource
    Articles et Livres
    décembre, 2010
    Chine

    The paper describes the land use situation in the project area from two aspects. Firstly, natural situation (landscape, temperature, soil hydrology, natural disaster); secondly, land use situation (land use structure, project construction scale, land area of different vegetation classes).

  6. Library Resource
    Articles et Livres
    juillet, 2016
    Chine

    This study elicits the risk preferences of rural households through a field experiment conducted in Shaanxi Province using the Holt-Laury mechanism that considers the effects of implementing the Sloping Land Conversion Program (SLCP) on the risk preferences of farmers. The program has significantly changed the structure of farmers' productive property, which may further influence their risk attitudes. This study reveals that household geographic and demographic characteristics have a significant effect on the risk preferences of participants in the experiment.

  7. Library Resource
    Articles et Livres
    décembre, 2015
    Chine

    The recent increase in the number of tourists has raised serious concerns about grassland degradation by tourism activities in Inner Mongolia. Thus, we evaluated the effects of tourism activities on the vegetation and soil in Hulunbuir grassland. We identified all the plant species, measured the number and height of plants and plant coverage rate, calculated species diversity, and estimated above-ground biomass in the used plot and the non-use plot. We also examined soil hardness, and soil physical and chemical properties in both plots.

  8. Library Resource
    Articles et Livres
    décembre, 2009
    Chine, Espagne, Inde, Brésil, Nouvelle-Zélande

    Data from the 1990-1994 period presented in the "Brazil's Initial National Communication" document indicated that the country is one of the top world greenhouse gas (GHG) emitters. A large majority of Brazil's GHG emissions come from deforestation mainly of the Amazon biome for agriculture and livestock land uses. This unique inventory is now out of date.

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