Abstract

Key Points

a. With the increase of population and economic development, people consume more and more plant-based food.
b. To meet increasing demand for the quantity and variety of crop production, it is better to obtain the maximum yield and benefit of plants.
c. The limit of resources utilization by plants and vegetation carrying capacity in the key period of plant resources relationship regulation must be used to realize Sustainable Use of Nature Resources and Agriculture High-quality production.

With the increase of population and economic development of a country or a region, people consume more and more plant products and services. To meet increasing demand for the quantity and variety of plant products and service, 80% of the original forest has become man-made vegetation such as farmland, man-made forest, fruit, crop and grass. A lot of exotic food plants were introduced to produce more plant products and service. As crop plants grow, the plant resources relationship may change from equilibrium state to non-equilibrium state, leading to land degradation, decline of vegetation and the decline of plant yield and quality or resources waste. To solve this problem, saskatoon berries, red plum apricot and corn planted in semi-arid region of the Loess Plateau of China were taken as examples to study the plant resources relationship and the method of Sustainable Use of Nature Resources and Agriculture High-quality production. The results show that Saskatoon berries will grow well and fruit, but red plum apricot and corn cannot grow well and fruit. To realize the sustainable utilization of resources and the crop high-quality production, the limit of resources utilization by plants and vegetation carrying capacity, especially the vegetation carrying capacity in the key period of plant resources relationship regulation has to be applied to adjust the plant resources relationship to obtain the maximum yield and benefit of plant products and realize crop high quality production. In water-limited regions, the theory of resource utilization limit by plant is the soil water resources utilization limit by plants and the carrying capacity of vegetation is soil water carrying capacity for vegetation.

Keywords:Plant production and service; High quality production; Sustainable supply; Resources utilization limit by food plant; Vegetation carrying capacity; Food security