摘要
通过采集半流动沙丘、5年、10年和22年生小叶锦鸡儿人工固沙植被的土壤样品,对各类型土壤的养分状况、微生物和主要土壤酶活性进行对比研究。土壤按5层取样:0～10,10～20,20～30,30～40,40～50cm。结果表明,采用植物固沙工程固定沙丘后,表层土壤(0～10cm)有机C和全N含量显著增加,同时土壤生物活性也大幅度提高,土壤微生物生物量C和N的含量以及土壤脲酶、蔗糖酶、磷酸单酯酶和多酚氧化酶活性均明显提高。这种改良效应随着年龄增长而逐渐增加。土壤微生物生物量C与土壤总有机C含量,微生物生物量N与土壤全N之间均存在着明显的正相关性。
We collected soil samples in an age sequence of 0-, 5-, 10-, and 22-year-old Caragana microphylla plantations and assessed the effects of the shrub on soil physicochemical properties. Soil samples were taken form five depths （0-10, 10-20, 20-30, 30-40 and 40-50cm）. Results show that shrub establishment and development enhance organic C and total N accumulation, and improve the biological activities of soil. Microbial biomass C, N and activities of soil urease, saccharase, polyphenol oxidase and phosphataese are all increased significantly after C microphylla shrub vegetation established. The effects of shrub plantation on soil biological activities increase with the age increase. The relationships between microbial biomass C and soil organic C and between microbial N and soil total N are all of positive linear correlation.
出处
《辽宁工程技术大学学报（自然科学版）》
EI
CAS
北大核心
2006年第4期606-609,共4页
Journal of Liaoning Technical University (Natural Science)
基金
国家"十五"科技攻关项目(2005BA517A08)
辽宁省博士启动基金资助项目(20031013)
关键词
植物固沙工程
土壤微生物
土壤酶
生物活性
小叶锦鸡儿
plant sand-fixation engineering
soil microbe
soil enzyme
biological activity
Caragana microphylla
