根结线虫病土引入秸秆碳源对土壤微生物生物量和原生动物的影响

应用生态学报

根结线虫病土引入秸秆碳源对土壤微生物生物量和原生动物的影响

张四海^1,2,连健虹²,曹志平^3**,赵鹂¹

(¹丽水学院生态学院, 浙江丽水 323000; ^2丽水实验学校, 浙江丽水 323000; ³中国农业大学资源与环境学院, 北京 100193)

出版日期:2013-06-18 发布日期:2013-06-18

Effects of adding straw carbon source to root knot nematode diseased soil on soil microbial biomass and protozoa abundance.

ZHANG Si-hai^1，2, LIAN Jian-hong², CAO Zhi-ping³, ZHAO Li

(¹College of Ecology, Lishui University, Lishui 323000, China; ²Experimental School of Lishui, Lishui 323000, China; ³College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China)

Online:2013-06-18 Published:2013-06-18

摘要/Abstract

摘要：

研究了添加秸秆碳源在连续种植条件下对根结线虫病害严重土壤中微生物生物量和原生动物丰富度的影响. 供试作物为番茄, 设置3个梯度的小麦秸秆添加量\[1N(2.08 g·kg^-1)、2N (4.16 g·kg^-1)和4N(8.32 g·kg^-1)\].结果表明: 添加秸秆碳源对微生物生物量碳、氮和原生动物丰富度具有显著影响,且这种影响呈现为4N>2N>1N>CK.添加秸秆碳源对原生动物群落结构也具有显著影响,各处理鞭毛虫、肉足虫和纤毛虫的平均比例分别为36.0%、59.5%和4.5%.在相同秸秆添加量下,土壤微生物量碳氮、微生物碳氮比和原生动物丰富度随种植年限的延长而提高.

Abstract: A field experiment with successive planting of tomato was conducted to study the effects of adding different amounts of winter wheat straw (2.08 g·kg^-1, 1N; 4.16 g·kg^-1, 2N; and 8.32 g·kg^-1, 4N) to the soil seriously suffered from root knot nematode disease on the soil microbial biomass and protozoa abundance. Adding straw carbon source had significant effects on the contents of soil microbial biomass carbon (MBC) and microbial biomass nitrogen (MBN) and the abundance of soil protozoa, which all decreased in the order of 4N > 2N > 1N > CK. The community structure of soil protozoa also changed significantly under straw addition. In the treatments with straw addition, the average proportion of fagellate, amoeba, and ciliates accounted for 36.0%, 59.5%, and 4.5% of the total protozoa, respectively. Under the same adding amounts of wheat straw, there was an increase in the soil MBC and MBN contents, MBC/MBN ratio, and protozoa abundance with increasing cultivation period.

张四海1,2,连健虹2,曹志平3**,赵鹂1. 根结线虫病土引入秸秆碳源对土壤微生物生物量和原生动物的影响[J]. 应用生态学报.

ZHANG Si-hai1，2, LIAN Jian-hong2, CAO Zhi-ping3, ZHAO Li. Effects of adding straw carbon source to root knot nematode diseased soil on soil microbial biomass and protozoa abundance.[J]. Chinese Journal of Applied Ecology.