高州市典型坡地不同利用方式对土壤理化性状的影响

就广东省高州市典型坡地相邻地块不同利用方式对土壤理化性状影响的研究表明：人工梯地上的农林复合系统和多年生物复合群落的土壤容重，土壤结构和土壤持水力及水分渗透力与相邻天然森林土壤相近，优于退化灌草丛和残林地，其土壤有机质，N，P，K全量养分和速效养分含量也普遍比已退化坡地的高，揭示建立仿森林结构的农林复合系统和多年生作物复合群落，并注意实行水土保持的耕作，是退化坡地生态重建的有效途径之一。

Effect of Different Typical Slope Land Used Patterns on Soil Physical & Chemical Properties

The soil physical & chemical properties under different patterns of slope land used in Gaozhou county, Guangdong Province, were studied. The result showed that vegetation with lower coverage had high soil bulk density and water runoff, the soil pH in nature vegetation patterns was lower than that in the agricultural patterns slightly. The low quality vegetation had negative effects on soil fertility. It was revealed that factors influencing organic matter content, nutrient supply, soil vegetation cover and soil compaction are critical for soil degradation, and agroforestry systems appeared to have the ability to improve soils quality in degraded hillside ecosystems.