沙棘人工林土壤微生物群落结构及酶活性的季节变化  

Seasonal dynamics of soil microbial community and enzyme activities in Hippophae rhamnoides plantation

作　　者：罗蓉 杨苗 余旋[1] 马梓桐 郝汝倩 杨琳 LUO Rong;YANG Miao;YU Xuan;MA Zi-tong;HAO Ru-qian;YANG Lin(College of Forestry, Northwest A＆F University/Shaanxi Province Key Comprehensive Laboratory of Forestry/State Forestry Administration Key Laboratory of Silviculture on the Loess Plateau, Yangling 712100, Shaanxi, China）.)

机构地区：[1]西北农林科技大学林学院/陕西省林业综合重点实验室/国家林业局黄土高原林木培育重点实验室,陕西杨凌712100

出　　处：《应用生态学报》2018年第4期1163-1169,共7页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(31670629);中国博士后科学基金项目(2016M600822);西北农林科技大学林学院青年教师培育计划项目(Z111021602);教育部博士点基金项目(20120204120043)资助~~

摘　　要：采用时空互代法,研究了林龄和季节对沙棘人工林地土壤微生物群落结构和酶活性的影响.结果表明:沙棘人工林磷脂脂肪酸总量、细菌脂肪酸总量、真菌脂肪酸总量均随着林龄的增长而增加,且在成熟林时达到最大值.土壤β-葡糖苷酶、纤维素酶、脲酶、蛋白酶、磷酸酶活性均随着林龄的增长逐渐增加,并于成熟林时达到最大值.雨季的土壤酶活性均显著高于旱季.土壤微生物群落结构及酶活性均与土壤p H、全氮、速效磷含量呈显著正相关.表明林龄和季节对沙棘人工林地土壤微生物群落结构和酶活性有显著影响.在黄土高原,营造沙棘人工林能有效提高土壤肥力.We investigated the effects of forest age and season on soil microbial community structure and enzyme activities in Hippophae rhamnoides plantation. The results showed that the amounts of total PLFAs, bacterial PLFAs, and fungal PLFAs increased with the increases of forest age. The highest values presented in mature plantation （CL）. Soil enzyme activities showed the same trend as soil microbial communities. The total PLFAs, bacteria PLFAs, and fungal PLFAs exhibited significantly positive correlations with soil pH, total nitrogen, and available phosphorus. In conclusion, forest age and season has significant impacts on soil microbial community structure and enzyme activities. H. rhamnoides plantation is a suitable afforestation model, which would help improve soil fertility.

关 键 词：沙棘人工林 林龄 微生物群落 酶活性 季节 

分 类 号：S714.3[农业科学—林学]