连作茶树根际土壤酸度对土壤微生物的影响

发布时间：2018-05-01 07:16

本文选题：茶树 + 连作　；参考：《应用与环境生物学报》2016年03期

【摘要】：为了解连作茶树根部土壤酸化对微生物生物量及区系的影响,以不同种植年限黄金桂茶树根际土壤为研究对象,分析茶树根际土壤p H值对土壤微生物量、微生物数量和微生物类群的影响以及土壤微生物对土壤酸度响应的敏感性趋势.结果显示,茶树根际土壤的微生物生物量碳、微生物呼吸强度、微生物生物量氮及细菌、放线菌、氨化细菌、亚硝酸细菌、反硝化细菌、好气性自生固氮菌、好气性纤维素分解菌的数量随着茶树树龄的增加呈现下降趋势,且与茶树根际土壤p H值呈现极显著正相关(P0.01),而真菌、嫌气性纤维素分解菌、硫化细菌的数量呈现上升趋势,且与茶树根际土壤p H值呈现极显著正相关(P0.01).敏感性分析结果显示,不同微生物指标响应茶树根际土壤p H值变化的趋势为微生物呼吸强度(8.721 8)细菌(8.428 7)微生物量碳(7.955 2)硫化细菌(7.726 8)放线菌(5.780 0)真菌(4.740 8)嫌气性纤维素分解菌(4.065 0)氨化细菌(3.760 6)好气性自生固氮菌(2.368 3)反硝化细菌(2.340 6)微生物量氮(2.324 2)亚硝酸细菌(2.219 8)好气性纤维素分解菌(1.772 0).综上表明,茶树根际土壤酸化显著影响了土壤微生物数量变化,不同的微生物指标响应土壤酸度的敏感性存在一定差异.(图3表3参32)
[Abstract]:In order to understand the effects of soil acidification on microbial biomass and flora in the roots of continuous cropping tea tree, the effects of P H on soil microbial biomass, microbial number and microbial populations and the sensitivity trend of soil microbial response to soil acidity were analyzed in the rhizosphere soil of Huang Jingui tea tree with different planting years. The results showed that microbial biomass carbon, microbial respiration, microbial biomass nitrogen and bacteria, actinomycetes, ammoniated bacteria, nitrous bacteria, denitrifying bacteria, aerobic bacteria, and aerobic cellulose decomposing bacteria decreased with the increase of tea tree age, and P H in the rhizosphere soil of tea tree. The value showed a very significant positive correlation (P0.01), but fungi, anaerobic cellulose decomposing bacteria, the number of vulcanizing bacteria showed an upward trend, and showed a very significant positive correlation with the P H value of the rhizosphere soil of tea tree (P0.01). The sensitivity analysis showed that the trend of the change of P H value of different microbial indexes in response to the P H value of the rhizosphere soil of tea tree was microbial respiration intensity (8.721 8) bacteria (8.4287) microbial biomass carbon (7.9552) vulcanized bacteria (7.7268) actinomycetes (5.7800) fungi (4.7408) anaerobic cellulose decomposing bacteria (4.0650) ammoniacal bacteria (3.7606), aerobic nitrogen fixing bacteria (2.3683) denitrifying bacteria (2.3406) microbiological nitrogen (2.3242) nitrite (2.2198) bacteria (2.2198), aerobic cellulose decomposing bacteria (1.7720). The results showed that the acidification of the rhizosphere soil of the tea tree significantly affected the change of soil microbial biomass, and the sensitivity of different microbial indicators to soil acidity was different. (Figure 3, 3 and 32)

【作者单位】：龙岩学院生命科学学院;福建农林大学福建省农业生态过程与安全监控重点实验室;武夷学院生态与资源工程学院;
【基金】：国家“948”项目(2014-Z36) 厦门市科技计划项目(3502Z20151155) 泉州市科技计划项目(2012N8) 南平市科技计划项目(N2013X01-6) 龙岩学院“人才引进项目”资助(LB20150001)~~
【分类号】：S571.1;S154.3

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