关键词: 土壤肥力长期试验, 土壤肥力变化, 生态安全格局, 生态廊道, 杭锦旗, 地表湿润指数, 生态源地

Abstract: The fertility changes of soil under different fertilization treatments of a twelve years field trial indicated that the application of compost recycled in a farming system with appropriate amount of fertilizer applied to balance the soil nutrient budget, could not only produce higher crop yields and less surplus of nutrients into environment, but also improved soil fertility with significant increase of soil organic carbon and nitrogen in cultivated layer. However, maintaine higher soil available phosphorus, it was not sufficient just to balance the budget of soil phosphorus, and more phosphorus fertilizer application was needed.

Key words: ecological security pattern, Hangjin Banner., ecological corridor, ecological source, surface humid index