Dynamic Optimal Management of Wind‐Erosive Rangelands
构建了一个生物经济模型，研究风蚀草场中表土存量与牧草生产力的关系，以及放牧强度对土壤风蚀的影响，发现低贴现率和考虑外部损害会促使更轻的放牧，有利于可持续生产。
Abstract A bioeconomic model of livestock production from wind‐erosive rangelands is developed and optimized. Equations of motion capture the impact of topsoil stock on forage productivity and the protective effect of forage stock on soil loss from wind erosion. For overgrazed wind‐erosive rangelands, a lower discount rate provides incentives for lighter grazing, as does consideration of effect of stocking rates on animal performance. In the case where off‐site damages are large, internalizing off‐site effects would also encourage lighter grazing and hence promote sustainable production. An illustrative application of the model is also included.