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The assessment of ecological effectiveness in the region implemented grain for green programme in China in 1990–2010

机译：1990-2010年在中国实施的“退耕还林”项目区域生态效益评估

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China's Grain for Green Programme (GGP) is the largest ecological restoration programme ever implemented in a developing country, but the ecological effectiveness in its whole implementation region still remain uncertain. Based on the trend analysis of dynamics in ecosystem structure and service, we assessed the ecological effects before and after the implementation of the GGP in 1990-2010 by developing a series of assessment indexes composed of macro-structure, quality, key service of ecosystem and main impacting factors for these changes. Remote sensing interpretation and ecological model simulations based on multisource images are employed. We found that forest land and artificial surface increased slightly while cropland, grassland decreased, with a main transformation of cropland to forest land. The ecosystem quality, including NDVI, vegetation coverage, LAI, vegetation aboveground biomass and NPP, and services of soil retention and sand fixation in the implementation region has been improved. It appeared a warming and drying climate change trend, with a slight increase in human activities.
机译：中国的“绿色换粮计划”（GGP）是有史以来在发展中国家实施的最大的生态恢复计划，但是在整个实施地区的生态效益仍然​​不确定。在对生态系统结构和服务动态的趋势分析的基础上，我们通过制定一系列由宏观结构，质量，生态系统关键服务和生态系统服务组成的评估指标，对1990-2010年GGP实施前后的生态影响进行了评估。这些变化的主要影响因素。利用基于多源图像的遥感解释和生态模型模拟。我们发现林地和人工地表略有增加，而耕地，草地减少了，其中耕地向林地的主要转变。在实施区域内，包括NDVI，植被覆盖，LAI，植被地上生物量和NPP在内的生态系统质量以及土壤保持和固沙服务得到了改善。它出现了变暖和干燥的气候变化趋势，人类活动略有增加。

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