植被－侵蚀动力学理论是我国学者发展起来的一门新的边缘学科，研究流域植被与侵蚀在人类活动影响下的演变规律。根据该理论可建立植被－侵蚀动力学模型并推导植被－侵蚀状态图，为水土流失生态退化区的治理提供了新的理论工具。本文进一步发展和完善植被－侵蚀动力学理论，将其推广应用到我国典型水土流失地区，探讨这些地区的治理前景，并提出优化治理方略。 以黄土高原为例，分析得出了典型小流域的植被－侵蚀动力学参数与流域年均气温、年降雨量、土壤中值粒径、平均坡度之间的相关关系。得到的关系式可应用于黄土高原其它地区。 应用植被－侵蚀动力学理论研究了我国典型水土流失山地区包括黄土高原、长江上游、华北土石山区、和南方红壤侵蚀区的植被发育和侵蚀演变规律。将黄土高原划分为长城沿线区、丘陵沟壑东区、丘陵沟壑西区、和高原沟壑区。黄土高原生态环境恶劣，只有高原沟壑区通过治理能够发育出可自我修复的植被，其它三个区只能通过小流域高强度治理才能有效改善植被和减少侵蚀，并且需要不断维护和持续治理才能维持。将长江上游划分为高寒湿润区、干热河谷区、和云贵川区。高寒湿润区植被发育缓慢，植被一旦破坏很难修复。干热河谷区过去三百年来植被破坏严重，侵蚀严重。但是该区植被－侵蚀状态图上C区较大，治理后能发育出自我维持相对稳定的植被。云贵川区现状较好，承受少量植被破坏和砍伐后能自我修复。南方红壤区具有最好的植被侵蚀-状态图，植被有较强的生态弹性，即使遭受严重破坏也可通过植树造林迅速恢复。野外调查实验结果表明选择适当造林物种及造林措施可以快速治理水土流失、大大加快植被恢复演替过程。华北土石山区植被－侵蚀状态图上过渡区很大，人类活动能大幅度改变植被状态。 文章还应用植被－侵蚀状态图探讨了丘陵沟壑区、干热河谷区在预定目标下所需治理力度和优化治理方略。结果表明：丘陵沟壑区宜先大力造林种草，配合控制侵蚀工程措施；干热河谷区必须大力控制侵蚀，再加强生物措施，如此可以尽快改善植被。
Vegetation-erosion dynamics and vegetation-erosion chart has become a very useful tool for studying evolution of watershed vegetation and erosion under the action of various ecological stresses. Effective training strategies of eroded watershed can be found by analyzing the vegetation-erosion chart for an eroded area. This dissertation applies the vegetation-erosion dynamics to typical erosion areas of China, develops theory and proposes management strategies for these areas. The parameters of vegetation-erosion dynamics are correlated to the annual temperature, annual precipitation, median diameter of soil, and the average gradient and empirical formulas are suggested for different zones in the Loess Plateau of China. The correlation formulas can be applied to other watersheds in the Loess Plateau. The characteristics of vegetation and erosion of the Loess Plateau, the upper Yangtze River basin, the Haihe River basin, and the red soil area in South China are studied with the vegetation-erosion dynamics. The Loess Plateau is divided into 4 zones with different vegetation-erosion charts, i.e. northwest sandy area (along the Great Wall), east hilly-gullied and west hilly-gullied areas, and gullied plateau area (South-east of the Loess Plateau). The study indicates that only in the gullied plateau area vegetation with self-restoration capacity may develop under the human’s efforts of reforestation and erosion control. In the other three zones, the vegetation can be improved in small watersheds by high intensity of reforestation and erosion control engineering, but the improved small watersheds need continuous management. The upper Yangtze River basin is divided into three zones, i.e. cold Qinghai plateau, dry and hot valleys, and transitional zone. Vegetation in the cold Qinghai plateau develops very slowly. Once the vegetation is impaired it is difficult to be restored. Vegetation in the dry and hot valleys has been severely deteriorated due to long-term human impacts and serious soil erosion. Nevertheless, there is a relatively large C-zone in the vegetation-erosion chart. It can be restored in small watersheds by high intensity of reforestation and erosion control engineering. After restoration, the small watersheds can maintain self-restoring vegetation. Vegetation in the transitional zone is well developed, but managements are needed to prevent vegetation from being excessively logged. The red soil area in south China has the best vegetation-erosion chart and the vegetation has a high resilience. Vegetation in the area can be restored automatically after certain destruction. Even if being destroyed, it can be recovered quickly by reforestation. Field investigation and experiment show that reforestation with selected wood species may accelerate vegetation succession and reduce the succession time by 30-40 years. There are is a very large transitional zone in the vegetation-erosion chart for the Haihe River basin, which means that humans may change the vegetation to a considerable extent by reforestation and deforestation. The most effective strategies for vegetation improvement and erosion control are studied with the vegetation-erosion chart for the Loess Plateau and the dry and hot valleys. It is found that for the hilly-gullied area on the Loess Plateau, reforestation is very effective for erosion control. For the dry and hot valleys erosion control engineering should be taken first and then reforestation may result in sustainable vegetation.
