柠条林对黄土丘陵区土壤物理性质和肥力的影响分析

Analysis on Change of Soil Properties of Caragana Plantation in Loess Hilly Area

为了进一步探明柠条林在黄土丘陵区生态修复中的作用,对黄土丘陵区8年生柠条林对土壤物理性质、土壤肥力的影响进行研究分析。结果表明,柠条灌木林可明显降低土壤容重,提高土壤保水、持水能力,明显增加土体中水稳性团聚体和微团粒的数量,提高土壤中有机质、速效氮、速效钾的含量,能使土壤的结构及营养状况得到很大改善;能促进粘粒形成聚积,有利于保护生态环境;并具有明显的保水保土效益。

To explain the effec of Caragana plantation in loess hilly area, soil physical properties and soil fertility were studied with 8-year-old Caragana plantation. The results show that planting Caragana could decrease soil density, improve soil＇s water-holding and supplying ability, increase the contents of soil water-stable aggregates and microaggregates, improve the contents of soil organic matter, rapidly available nitrogen, and rapidly available potassium, improve soil nutrient conditions,and change soil structure. It could also accelerate the formation of clay soil accumulation, benefit agricultural products, protect eco-environment, and have obvious soil and water conservation benefit.