HUANG Na,ZHOU Yi,WU Xiaoni,et al.Effects of Dominant Species on Soil Enzyme Activity in the Phosphorus-Enriched Degraded Mountain Area in the Lake Dianchi Watershed of Southwestern China[J].Research of Soil and Water Conservation,2019,26(04):171-176.
滇池流域富磷退化山区主要优势植物对土壤酶活性的影响
- Title:
- Effects of Dominant Species on Soil Enzyme Activity in the Phosphorus-Enriched Degraded Mountain Area in the Lake Dianchi Watershed of Southwestern China
- 分类号:
- S154
- 摘要:
- 为了了解富磷山地不同生活型植物对土壤主要酶活性的影响，选取滇池流域富磷退化山区5种常见优势植物（云南松、蔗茅、白茅、马桑和紫茎泽兰），采集其根区土与根际土，分析了不同土壤酶活性。结果表明：云南松影响下的根区土及根际土脲酶活性最高，分别为0.99，2.60 mg/（g·d）；紫茎泽兰影响下的土壤蛋白酶活性最高，为312.39 μg/（g·d），但蔗茅、白茅及紫茎泽兰之间差异并不显著；云南松根区土及紫茎泽兰根际土纤维素酶活性最高，分别为0.81，2.12 mg/（g·3 d）；5种植物其土壤酸性及碱性磷酸酶活性变化较小。通过根际效应比较发现5种植物对脲酶和纤维素酶的根际效应相对较强，其次为蛋白酶，最弱的为酸性磷酸酶及碱性磷酸酶。结合植物对根区土及根际土酶活性的影响进行了综合效应比较，5种植物高低顺序依次为云南松 > 白茅 > 紫茎泽兰 > 马桑 > 蔗茅。土壤酶活性高低一方面说明植物对土壤生物性质的影响，另一方面也反映了植物对立地环境的适应方式，因此，评价植物在富磷退化山区的恢复潜力，还应结合植物对土壤理化性质、生态水文过程及在群落构建过程中的作用等进行综合评价。
- Abstract:
- In order to understand the effects of dominant species on soil enzyme activity in the phosphorus-enriched degraded mountain area, five different dominant species (Pinus yunnanensis, Erianthus rockii, Coriaria nepalensis, Imperata cylindrica and Eupatorium adenophorum) were selected to measure the main soil enzyme activities in root-zone soil and rhizosphere soil. The results showed that the urease activities of P. yunnanensis in root-zone [0.99 mg/(g·d)] and rhizosphere soil [2.60 mg/(g·d)] were the highest. E. adenophorum protease activities [312.39 μg/(g·d)] displayed the highest in rhizosphere soil. The cellulase activities were the highest in root-zone soil of P. yunnanensis [0.81 mg/(g·3 d)] and in rhizosphere soil of E. adenophorum [2.12 mg/(g·3 d)]. The phosphatase activites of five species in root-zone soil and rhizosphere soil slightly changed. Comparing the rhizosphere effect, we found that the rhizosphere effects of five species on urease and cellulase were relatively strong, followed by protease, and the rhizosphere effects on phosphatase were weakest. According to the effects of species on root-zone soil and rhizosphere soil enzyme activities, the order of the comprehensive effects displayed the sequence: P. yunnanensis > I. cylindrica > E. adenophorum > C. nepalensis > E. rockii. Soil enzyme activity not only illustrates the impact of plants on soil biological properties but also reflects the ways of plant adaptation to environment. Therefore, the evaluation of plant recovery potential in the plosphorus-enriched degradation mountainous area should combine with other aspects, such as the effects on soil physical and chemical properties, eco- hydrological processes and the role in the community assembly process.
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备注/Memo
收稿日期:2018-09-11;改回日期:2018-10-30。
基金项目:国家自然科学基金（31860133，31360152）；云南省地方本科高校基础研究联合专项（2017FH001-044）
作者简介:黄娜(1994-),女,云南宣威人,在读硕士生,研究方向为恢复生态学。E-mail:1373833860@qq.com
通讯作者:付登高(1978-),男,山东临沂人,博士,讲师,主要从事恢复生态学及流域面源污染防控研究。E-mail:dgfu@ynu.edu.cn