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首页> 外文期刊>Arid Land Research and Management >Prediction of Aboveground Net Primary Productivity and Foliage Projective Cover in an Arid Area of China
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Prediction of Aboveground Net Primary Productivity and Foliage Projective Cover in an Arid Area of China

机译：中国干旱区地上净第一性生产力和植被投射覆盖度的预测。

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摘要

It appears that two main factors hinder the effective incorporation of ecological information derived from computer modeling in resource management at large spatial scales: (1) some models are not ecologically sound and (2) most models based on ecological principles are often too sophisticated or detailed, having complex structures and requiring a large range of input data. This paper employs a generic model based on well-established ecological principles, but with appropriate detail, to better serve decision-making in sustainable resource management. The model was used to simulate above ground net primary productivity (ANPP), foliage projective cover (FPC), and the evaporation coefficient (k) for large arid areas in northwest China, where there has been serious desertification recently. Observation data of ANPP and FPC in the study area were used to validate the model, and the model results were in good agreement with observation data and other published data. The model was then used to simulate the evaporation coefficient, FPC, and ANPP for the study area. The simulation results indicated that except for several sites, the k parameter was lower than 0.35 x 10(-2) and implied a typical arid climate in the study area. Estimated FPC of the plant community was lower than 50% at most sites, and the annual ANPP was very low-less than 1 tons . ha(-1) . yr(-1) at 93.8% of sites. These simulation results could serve as references for vegetation restoration and livestock husbandry management in arid areas of China.
机译：似乎有两个主要因素阻碍了从计算机模型获得的生态信息在大空间尺度上有效地整合到资源管理中：（1）一些模型在生态上不健全;（2）大多数基于生态原理的模型通常过于复杂或过于详尽，具有复杂的结构，并且需要大范围的输入数据。本文采用了基于公认的生态学原理的通用模型，但有适当的细节，以更好地为可持续资源管理中的决策服务。该模型用于模拟中国西北大干旱地区的地上净初级生产力（ANPP），树叶射影覆盖率（FPC）和蒸发系数（k），这些地区最近发生了严重的荒漠化。用研究区的ANPP和FPC观测数据对模型进行了验证，模型结果与观测数据及其他公开数据吻合良好。然后，该模型用于模拟研究区域的蒸发系数，FPC和ANPP。模拟结果表明，除几个地点外，k参数均低于0.35 x 10（-2），这表明该地区是典型的干旱气候。在大多数地点，植物群落的FPC估计低于50％，年ANPP非常低，不足1吨。 ha（-1）。 yr（-1）在93.8％的网站上。这些模拟结果可为中国干旱地区的植被恢复和畜牧业管理提供参考。

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