Caragana High-Quality Development

As economic develop and population increase, there is an increasing demand for plant goods and ecological service. Because plant goods and service producing by original forest cannot meet the increasing need of people, most of the original forest has gradually become fruit, farmland, plantation and grass. A lot of exotic plant was introduced to produce special production and service in the plant restoration. As introduced plant grow, vegetation decline and crop failure will happen because plant overload and overuse nature resources or plant waste resources because plant underuse nature resources because underload. To solve these problems, according to my years of research, the results have showed that there is a resource use limit by plants, vegetation carrying capacity and the critical period of plant resources relation regulation. Resources use limit by plants includes space resources use limit by plants in soil water and nutrient rich regions, soil water resources use limit by plants in water-limited regions and soil nutrient resources use limit by plants in nutrient-limited regions. vegetation carrying capacity includes space vegetation carrying capacity, soil water vegetation carrying capacity and soil nutrient vegetation carrying capacity and the critical period of plant resources relation regulation in the process of plant growth. When the available amount of nature resources reduced to resources use limit by plants, such as soil water resources use limit by plants, which is the soil water resources in the range of the maximum infiltration depth is equal to soil water resources use limit by plants, the plant resources relation enters the critical period of plant resources relation regulation. The ending time of the key period of plant resources relation regulation is the ineffective time of plant resources relation regulation. If the existing plant density is more than vegetation carrying capacity in the key period of plant resources relation regulation, the plant resources relation has to be regulated on the vegetation carrying capacity to get maximal yield and beneficial effect and realize sustainable use of nature resources, high quality sustainable management of forest vegetation and agriculture high quality production.