我国草原牧区可持续发展的科学基础与实践

Abstract

Great changes have taken place in the dietary structure of urban and rural residents in China since the country’s reform and opening starting from the end of 1970s. During the past three decades, grain consumption has reduced and animal food consumption has increased significantly, causing a sharply increased demand of forage. However, the country’s cropping structure has not been adjusted timely, resulting in a large number of grain to be used as forage. Although China has a grassland area of 4×10 8 hectares, which should play an important role in the country’s ecological security and food security, its forage grass and livestock production are considerably low, with different levels of degradation across the grasslands, so that it is far not satisfied with a need of animal husbandry development, because of its extensive management and less input of prataculture. Our analysis showed that developing artificial pasture, which grass yield can be more than 10 times higher than natural grassland, is an effective way to promote the production of forage grass in China. We thus developed the “animal-husbandry development” model, which uses a small area (less than 10% of the grassland) with high quality site to develop intensive artificial pasture to enhance forage grass production, and prevents a large area of the natural grassland (more than 90% of the grassland) from degradation and over-grazing. In order to implement “animal husbandry development” model, we proposed to construct an “eco-animal husbandry experimental zone” in the grassland areas. The “experimental zone” is planned and designed as a coupled system of nature-economy-society complex in a considerably large area, to promote production of artificial pasture and animal husbandry and improve ecological functioning of natural grassland. This paper also discusses the bottleneck issues about socio-economic development in pasturing areas, and proposed seven principles for the development of pasturing areas, including grass breeding, artificial grassland planting, efficient harvesting, efficient use of water, protection and better use of natural grassland, trade-off between grass production and ecological functioning, and system development.