AN Shao-shan,HUANG Yi-mei,LIU Meng-yun,et al.The Responses and Evaluation of Soil Enzymatic Activities to Plant Rehabilitation in Ningxia Loess Hilly-gully Region[J].Research of Soil and Water Conservation,2005,12(03):31-34.
宁南宽谷丘陵区植被恢复中土壤酶活性的响应及其评价
- Title:
- The Responses and Evaluation of Soil Enzymatic Activities to Plant Rehabilitation in Ningxia Loess Hilly-gully Region
- Keywords:
- soil enzymatic activity; plant rehabilitation; loess hilly-gully area of Ningxia; principle component analysis
- 分类号:
- S154.2
- 摘要:
- 就宁南宽谷丘陵区不同植被恢复措施、自然恢复不同演替阶段条件下土壤脲酶、蔗糖酶、中性磷酸酶和过氧化氢酶活性的变化特征及其在土壤质量评价指标体系的作用进行了研究。结果表明天然草地和灌木林地土壤脲酶、蔗糖酶、碱性磷酸酶活性较高，农地和果园土壤酶活性较低，而且变异性较大。土壤过氧化氢酶在不同的土地利用类型之间变化不大，在各用地类型内部及各土样剖面层次上差异也不明显。封禁条件下各种酶活性均表现为表层0～20cm大于表下层20～40cm，表层0～20cm脲酶、蔗糖酶、中性磷酸酶活性表现长芒草+大针茅>铁杆蒿>长芒草>百里香，过氧化氢酶活性大小为铁杆蒿>长芒草+大针茅>长芒草>百里香。长芒草群落两种土地利用方式下，脲酶活性为开垦地>封禁地，中性磷酸酶则表现为封禁地>开垦地，蔗糖酶与过氧化氢酶差别不大。铁杆蒿群落放牧地的土壤脲酶、蔗糖酶和中性磷酸酶含量均高于封禁和开垦的同土层土壤，封禁的脲酶和蔗糖酶次之，开垦地的脲酶和蔗糖酶最小，开垦地的中性磷酸酶高于封禁地。
- Abstract:
- Soil quality restoration and soil management is the key factor for vegetation construction and eco-environment sustainable development in Loess Plateau. The activity of soil urease, sucrase, neutral phosphatase and catalase in different soil layers, vegetation community and land use on loess hilly-gully area of Ningxia were studied. The result shows that:Natural meadow and bush forest land had the higher enzyme activity than artificial meadow, orchard and farmland. For bush forest land, it was higher enzyme activity in longer planted year than shorter, but orchard has no remarkable differences. Under the enclosure, four different enzymatic activity of surface layer soil (0~20 cm) is greater than sub-layer (20~40 cm). The activities of soil urease, sucrase, neutral phosphatase are Stipa gradiss. +Stipa bungana Trin Community>Artemisia sacrorum Ledeb community>Stipa bungana Trin Community>Thymus mongolicus Ronn community in the surface layer (0~20 cm). The activity of soil catalaseis Artemisia sacrorum Ledeb community Stipa gradiss. +Stipa bungana Trin Community>Stipa bungana Trin Community>Thymus mongolicus Ronn community. Under the two different land use of Stipa bungana community, the activity of soil urease shows that the farmland is greater than enclosure land, butthe activity of soil sucrase is enclosure land greater than farmland. There is no obvious erosion and enzymatic activity difference between farmland and enclosure land in the study area.
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备注/Memo
收稿日期:2004-12-20;改回日期:。
基金项目:国家“十五”重大科技攻关课题（2001BA606A-04）；国家自然科学基金（40461006）；西北农林科技大学科研专项基金（04ZX011）
作者简介:安韶山（1972- ），男，宁夏人，博士，助研，从事土壤学与流域生态与管理研究工作。