Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 5.
  1. Library Resource
    Articles et Livres
    décembre, 2010
    Chine

    Soil moisture in the upper layer plays an important role in arid desert ecosystems. Dew as an additional source of fresh water, may have a positive impact upon the ecosystems in arid and semi-arid zones. Measurements on dew formation amount and duration were carried out in the whole October of 2008 at different condensing surface types (bare dune sands, physical soil crusts and biological soil crusts) associated with different inter-space positions between plants, and at the area under plant canopy in a revegetation-stabilized arid desert ecosystem in Shapotou area, China.

  2. Library Resource
    Articles et Livres
    décembre, 2010
    Chine

    The Grain-to-Green Program (GTGP) was initiated in China in 2000 to address environmental degradation. In northern China, the central goal of the program is to entice sustainable transitions in resource uses through subsidizing cropland afforestation and grassland exclosure. This study, based on a household survey in Shabianzi, an agropastoral community in the Mu Us Sandy Land, examines farmers' responses to and the environmental outcome of the GTGP.

  3. Library Resource
    Articles et Livres
    décembre, 2010
    Chine

    Spatial heterogeneities of vegetation and soil can strongly affect ecological functions of ecosystems, particularly for arid and semi-arid ecosystems where vegetation has a patchy distribution and livestock grazing is one of the major land use types. However, little is known about the impact of grazing on spatial patterns of vegetation and soil, even though grazing has variously been shown to create, maintain or destroy those patterns.

  4. Library Resource
    Articles et Livres
    décembre, 2010
    Chine

    In this study, classical, geostatistical methods and a geographical information system have been used to identify soil properties including soil organic carbon (SOC), total nitrogen (total N), salt content (SC) and soil moisture (SM), and their spatial variation as well as their relationships with groundwater, land use, and soil texture. The data came from 36 soil samples from 0 to 20cm depth, and 36 groundwater samples in the Tikanlik Oasis on the lower reaches of the Tarim River, northwest China.

  5. Library Resource
    Articles et Livres
    décembre, 2010
    Chine

    Growing pressures on timber resources and increasing environmental awareness have generated the need to comprehensively analyze forest management in Fujian Province, China. Fujian is the most heavily forested province in China and experiences an unprecedented property rights reform and changes in investment in forestry by rights holders. This paper focuses on the net present value (NPV) and the internal rate of return (IRR) for projected financial performance of plantation management for five species in Fujian.

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