Regulation Mechanism of Plant Growth Process

Aims: Non-native plantation and grass can effectively conserve soil and water and improve ecological environment but sometime soil desiccation occurs, led to severe soil degradation, vegetation decline and crop failure, which influence forest and grass high-quality sustainable development and Agriculture high quality production, so it is necessary to regulate the plant resources relationship and get maximum yield and benefits. However, there is a lack of a universally accepted theory to provide guidance of sustainable use of soil water resources and high-quality sustainable management of forest and Agriculture high quality production p in such regions. Purpose of the paper is to introduce the theory of plant resources relationship regulation. Methods: Different caragana plant density experiment plot was established in the same condition, the precipitation, plant growth, soil water content at different depth was investigated, the wilt coefficient at different soil depth, the maximum infiltration, soil water resources use limit by plants and the theory of soil water vegetation carrying capacity was dealt with. Results: The results showed that the theories of plant resources relationship regulation include the Resources Use Limit by Plants and Vegetation Carrying Capacity. Resources Use Limit by Plants and Vegetation Carrying Capacity include Space Resources Use Limit by Plants and Space Vegetation Carrying Capacity in soil water and soil nutrient rich regions, Soil water Vegetation Carrying Capacity and Soil Nutrient Resources Use Limit by Plants and Soil Nutrient Vegetation Carrying Capacity. The Soil water Vegetation Carrying Capacity is the population in a plant population or plant density of indicator plants in a plant community when the resources supply is equal to soil water consumption in the root zone and a given time, especially and changes with plant community type, location and time. Conclusions: The degree of coverage, productivity and benefits of a plant community when population quantity of an indicator plant equals SWVCC should be the theoretical basis for sustainable use of soil water resources, high-quality sustainable management of forest and grass and Agriculture high-quality production.