黄土高原植被恢复过程中土壤酶活性特征研究

目的]为生态恢复的持续健康发展提供科学依据。方法]通过对不同利用方式和不同层次的土壤酶活性测定和分析来评价植被恢复过程中的土壤质量。结果]植被恢复过程中,土壤酶活性随土层深度的增加逐渐减弱,在0~20 cm土层活性较大。不同利用方式下土壤酶活性大小总体上是草地>针叶林>灌木林>阔叶林>农田,尤其以蔗糖酶和磷酸酶最显著。相关分析表明脲酶与蔗糖酶呈极显著相关,与磷酸酶呈显著相关;磷酸酶与蔗糖酶呈极显著相关,与脲酶呈显著相关;蔗糖酶与脲酶和磷酸酶均呈极显著相关关系;过氧化氢酶与其他酶关系均不显著。结论]在植被恢复过程中,优化不同的经营模式和恢复措施,以期达到最大的生态的、社会的和经济效益。

Study on Characteristics of Soil Enzymatic Activities in Process of Vegetation Restoration on Loess Plateau

Objective] The study was to provide the scientific basis for the sustainable and healthy development of the ecological restoration.Method] The soil quality in the process of vegetation restoration was evaluated through the detection and analysis of the soil enzymatic activities in different using patterns and different layers.Result] The soil enzymatic activities were gradually weakened along with the increase of the depth of soil layer in the process of vegetation restoration,the enzymatic activities were bigger in the soil layer of 0-20 cm.Generally,the soil enzymatic activities under the conditions of different using patters from big to small was pasture> needle forest > shrub forest > broad-leaf forest > farmland,especially the invertase and phosphotase was the most significant.The correlation analysis showed that urease had extremely significant correlation with invertase and had significant correlation with phosphotase.Phosphotase had extremely significant correlation with invertase and had significant correlation with urease.Invertase had extremely significant correlation with urease and phosphotase.The relationship between the catalase and other enzymes was not significant.Conclusion] In the process of restoration of vegetation, different management models and recovery measures were optimized to achieve the largest ecological,social and economic benefits.