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本文研究了黔中岩溶丘陵区几种不同士地利用和管理方式下土壤物理、化学和生物学性状的特征。结果表明,农林(林草)复合利用模式在土壤粒级组成、孔隙分布、持水性能、有机质和N、P养分、酶活性等方面表现出较好的肥力性状特征,有机无机肥配施、精细管理的灌溉农田次之,而粗放管理的旱坡耕地,土壤肥力性状严重恶化,逐步向石漠化景观演变。不同土地利用方式和管理措施显著影响土地肥力变化的程度和方向,调整土地利用结构,实行基本农田精细管理、陡坡耕地退耕还林(革)是保护土地资源,实现区域生态重建和农业可持续发展的根本途径。
In this paper, the characteristics of soil physical, chemical and biological properties under different land use and management practices in karst hilly areas of Central Guizhou Province were studied. The results showed that the composite models of agriculture, forestry and forestry (FVC) showed good characteristics of fertility in the aspects of soil particle size distribution, pore distribution, water holding capacity, organic matter, N and P nutrients, and enzyme activity. Combined application of organic and inorganic fertilizers, The finely managed irrigated farmland is second, while the extensively managed dryland farmland severely deteriorates the soil fertility and gradually changes its landscape to rocky desertification. Different land use patterns and management measures significantly affect the degree and direction of land fertility changes, adjusting land use structure and implementing fine management of basic farmland. Returning farmland to forests on steep slopes is to protect land resources and achieve regional ecological reconstruction and sustainable agricultural development The fundamental way.