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Bulletin of Chinese Academy of Sciences (Chinese Version)

Keywords

Liaohe Plain; soil nutrient management; change and control of soil fertility; development of stabilized fertilizer; conservation tillage technique in arable soil

Document Type

Article

Abstract

Liaohe Plain is an important region of the temperate agro-ecosystem in China. To develop efficient agriculture in Liaohe Plain is the key to the stability of food production in Northeast China. However, the sustainable development of agro-ecosystem in Liaohe Plain has been severely constrained by decreasing cultivated land and worsening environment caused by long-term excessive use of resources. Focusing on the development of local agriculture and the management on agricultural resources, Shenyang Agro-ecosystem Experimental Station has conducted a series of long-term experiments since 1990s to explore the change of soil fertility under different management modes of soil nutrients. The retention, transformation and control mechanisms of fertilizer nitrogen in local agro-ecosystem have been clarified by isotope tracing techniques. A series of conservation tillage techniques have been established in rainfed arable soils based on the management mode of "nitrogen control with carbon to achieve a balance". Fertilizer efficiency has grown and the risk of non-point source pollution in agroecosystems decreased with the development of environmental-friendly and stabilized fertilizers. Through the combination between research, trial and extension, efficient management on soil and fertilizer provides scientific and technological support for regional modern agricultural development and ecological environment construction.

First page

992

Last Page

999

Language

Chinese

Publisher

Bulletin of Chinese Academy of Sciences

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