【摘要】 三川河流域属于国家8个水土保持重点治理区之一,随着治理的进展和农林牧业的发展,对耕地土壤的要求也越来越高。本文在对流域内不同耕地土壤肥力调查与测定的基础上,采用主成分分析(PCA),评价了不同类型农耕地的肥力状况,并划分了农地的类型,为不同类型农地土壤肥力的调控和农业发展,提供了科学依据。更多还原

【Abstract】 Sanchuanhe watershed is one of the eight key integrated control areas of soil and water conservation in China. As the developing of control work and agriculture, forestry and animal husbandry, soil of farmland is required more and more highly, This paper evaluates soil fertility of every type farmland, using PCA method, based on the investigation and measurement of soil fertility of different farmland in the watershed. A new classification of farmland has been suggested. It proposes scientific base for the regulation of different type farmland and the development of agriculture.更多还原