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(2.08g·kg-1)、2N(4.16g·kg-1)和4N(8.32g·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.
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.
出处
《应用生态学报》
CAS
CSCD
北大核心
2013年第6期1633-1638,共6页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(30970536)
浙江省自然科学基金青年科学基金项目(LQ13C030004)资助
关键词
秸秆碳源
微生物生物量碳
微生物生物量氮
原生动物丰富度
相对丰度
straw carbon source
microbial biomass carbon
microbial biomass nitrogen
protozoa abundance
relative abundance.
