灌木固沙林改良土壤效益分析

Benefits of Shrub Sand-fixation Forest for Soil Improvement

对榆林沙区固沙灌木林地的土壤养分进行了测定。分析结果表明,灌木固沙林具有明显的改良土壤的作用,该区沙地防风固沙林地土壤有机质明显增加,养分状况得到较大改善,其中土壤有机质增加2.2~20.6倍,全N增加2~22倍,速效P增加0.7倍,速效K增加41%,而土壤pH值变化不显著,均呈微碱性。研究结果表明,沙地土壤改良是一个非常缓慢的过程,榆林沙地土壤养分总体仍呈现贫瘠状态。

Soil nutrients of shrub sand-fixation forest in the Yulin sandy area were measured in this study.Results showed that shrub sand-fixation forest had a significant effect for soil improvement.Soil organic matter in windbreak and sand-fixation forest was increased obviously in the area and the soil nutrient status was improved considerably.Soil organic matter,total N,available P,and available K were increased by 2.2 to 20.6 times,2 to 22 times,0.7 times,and 41%,respectively.However,the pH of soil did not chang...