| 添加秸秆碳源对土壤微生物生物量和原生动物丰富度的影响 |
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| 引用本文： | 张四海,曹志平,胡婵娟.添加秸秆碳源对土壤微生物生物量和原生动物丰富度的影响[J].中国生态农业学报,2011,19(6):1283-1288. |
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| 作者姓名： | 张四海 曹志平 胡婵娟 |
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| 作者单位： | 1. 中国农业大学资源与环境学院 北京 100193
2. 中国科学院生态环境研究中心城市与区域生态国家重点实验室 北京 100085 |
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| 基金项目： | 国家自然科学基金项目(30970536)资助 |
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| 摘 要： | 为了研究引入秸秆碳源对根结线虫(Meloidogyne spp.)病害严重土壤中微生物生物量和原生动物的影响, 以番茄为供试作物, 设置4个梯度的小麦秸秆添加量CK(0 g·kg-1), 1N(2.08 g·kg-1)、2N(4.16 g·kg-1)和4N(8.32 g·kg-1)], 研究不同种植时间(6个月和4个月)下土壤微生物生物量碳、氮和原生动物丰度的变化。研究结果表明: 添加秸秆对微生物生物量碳、氮和原生动物丰富度有明显促进作用, 添加的秸秆量越多, 这种促进作用越明显。不同秸秆添加量处理中, 微生物生物量碳、氮和原生动物丰度为: 4N>2N>1N>CK。秸秆对原生动物的群落结构也有显著影响, 在各处理中, 鞭毛虫和肉足虫占有绝大比例, 分别占总丰度的29.44%和66.19%, 纤毛虫仅占4.37%。在相同添加秸秆量条件下, 土壤原生动物丰度随种植时间的延长而提高, 而微生物生物量碳、氮量随种植时间的延长而降低。而在种植时间相同条件下, 随着秸秆量的增加土壤微生物生物量碳、氮量和微生物生物量碳氮比和原生动物总丰度相应增加。
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| 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 温室蔬菜 |
| 收稿时间： | 2011/3/11 0:00:00 |
| 修稿时间： | 2011/5/31 0:00:00 |
Effect of added straw carbon on soil microbe and protozoa abundance |
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| ZHANG Si-Hai,CAO Zhi-Ping and HU Chan-Juan.Effect of added straw carbon on soil microbe and protozoa abundance[J].Chinese Journal of Eco-Agriculture,2011,19(6):1283-1288. |
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| Authors: | ZHANG Si-Hai CAO Zhi-Ping and HU Chan-Juan |
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| Institution: | College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China;College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China;State Key Laboratory of Urban and Regional Ecology;Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China |
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| Abstract: | Driven by economic profits, the area of vegetables grown under plastic-film greenhouse has rapidly increased in recent years in China. Specific environmental conditions in plastic-film greenhouses could cause severe root-knot nematode disease. Hence a greenhouse pot experiment was conducted to study the effects of added straw carbon on soil microbial biomass carbon (MBC), microbial biomass nitrogen (MBN) and soil protozoa abundance. In the experiment, independent cultivation methods and selected tomato crops were used in a 3-gradient additive 1N (2.08 g·kg-1), 2N (4.16 g·kg-1) and 4N (8.32 g·kg-1)] of winter wheat straw. Two sets of experiments were set up with respective tomato growth durations of 6 and 4 months. Based on the study, the order of abundance of MBC, MBN and protozoa was 4N>2N>1N>CK. Wheat straw carbon significantly enhanced MBC, MBN and protozoa abundance and protozoa community structure. Flagellate and amoeba were in vast proportions of soil microbial abundance, respectively accounting for 29.44% and 66.19%. Ciliates accounted for only 4.37% of total soil microbial abundance. With increasing cultivation period, soil protozoa abundance increased while soil MBC and MBN decreased under the same additive amount of wheat straw carbon. Under the same cultivation period, MBC, MBN, MBC/MBN ratio and soil protozoa abundance increased with increasing amount of added wheat straw carbon. |
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| Keywords: | Straw carbon source Microbial biomass carbon Microbial biomass nitrogen Protozoa abundance Greenhouse vegetable |
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