Effect of Continuous Monocropping of Tomato on Soil Microorganism and Microbial Biomass Carbon
Effect of Continuous Monocropping of Tomato on Soil Microorganism and Microbial Biomass Carbon
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番茄连作对土壤微生物及微生物量碳的影响
DOI：
10.1080/00103624.2016.1165832
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发表时间：
2016-04
影响因子：
1.8
通讯作者：
Zhou X. B.
中科院分区：
文献类型：
--
作者：
Mo A. S.;Qiu Z. Q.;He Q.;Wu H. Y.;Zhou X. B.
土壤微生物在养分循环转化中起着重要作用。土壤微生物学参数和微生物生物量碳（MBC）被认为是土壤质量的可能指标。对不同连作土壤微生物和MBC进行了研究。结果表明：0 ~ 30 cm土壤深度细菌数量最多，放线菌次之，真菌最少；土壤微生物数量随土层深度（0 ~ 10 >0 ~ 20 bbb20 ~ 30 cm）的增加而减少。除真菌在0-10 ~ 10-20 cm深度和细菌在10-20 ~ 20-30 cm深度外，不同深度土壤微生物比例对连作番茄的时间（年）变化有响应。连作12年土壤MBC显著低于连作5、8、10年（P < 0.05）。连作年限、土壤深度及其交互作用显著影响土壤真菌、细菌和放线菌的数量和MBC。0 ~ 10 cm土层细菌数量是番茄连作的敏感指标。土壤真菌数量在5 ~ 8年内随单作时间的增加而增加。
ABSTRACT Soil microorganisms play an important role in recycling and transformation of nutrients. Soil microbiological parameters and microbial biomass carbon (MBC) have been suggested as possible indicators of soil quality. Soil microorganisms and MBC in different continuous cropping soils were investigated. Results showed that bacterial population was the highest, followed by actinomycetes, and fungi were the lowest at 0–30 cm soil depth. The amount of soil microorganisms decreased with increasing soil depth (0–10 > 10–20 > 20–30 cm). Soil microbial ratios at different depths proved to be responsive to time (year) variations in continuous monocropping tomato, except those at 0–10 to 10–20 cm depth for fungi and 10–20 to 20–30 cm depth for bacteria. Soil MBC for 12 years of continuous cropping was significantly lower than those for 5, 8, and 10 years (P < 0.05). Continuous cropping years, soil depth, and the interaction of these two parameters significantly influenced soil fungal, bacterial, and actinomycetes populations and MBC. Bacterial population at the 0–10 cm soil layer was a sensitive indicator of continuous cropping of tomato. Soil fungal count increased with increasing monocropping time within 5–8 years.
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