| 复合微生物肥对植烟根际土壤团聚体稳定性和酶活性的影响 |
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| 引用本文： | 周郑雄,冯豪,丁继林,王源哲,李章海,齐永波.复合微生物肥对植烟根际土壤团聚体稳定性和酶活性的影响[J].南方农业学报,2022,53(11):3088-3097. |
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| 作者姓名： | 周郑雄 冯豪 丁继林 王源哲 李章海 齐永波 |
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| 作者单位： | 1. 贵州省烟草公司遵义市公司, 贵州遵义 563000;2. 安徽农业大学资源与环境学院, 安徽合肥 230036;3. 中国科学技术大学烟草与健康研究中心, 安徽合肥 230052 |
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| 基金项目： | 安徽农业大学大学生创新创业训练计划项目(XJDC2021396,XJDC2020480)贵州省烟草公司遵义市公司科技项目(201901)安徽省自然科学基金项目(1908085QD153) |
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| 摘 要： | 【目的】探讨施用复合微生物肥对植烟土壤的改良效果,为优质烤烟复合微生物肥的研制与应用提供科学依据。【方法】通过连续2年4季白菜—烟草轮作微区定位施肥试验,以不施肥为对照(CK),研究施用无机复合肥(CF)、生物有机肥(OF)和复合微生物肥(MF)对植烟根际土壤团聚体稳定性和关键酶活性的影响。【结果】连续种植4季后,各施肥处理>0.25 mm粒级水稳性团聚体累积含量、平均质量直径(MWD)和几何平均直径(GMD)较初始土壤均明显增加,表现为OF>CF>MF,与CF和MF处理相比,OF处理>0.25 mm粒级水稳性团聚体累积含量分别显著增加6.8%和14.5%(P<0.05,下同),MWD分别增加7.9%和36.1%,GMD分别增加10.5%和32.2%,随机森林分析表明2~5 mm和>5 mm粒级团聚体含量是影响团聚体MWD和GMD最主要的因子。连续种植4季,各施肥处理土壤脲酶和蔗糖酶活性呈上升趋势,而土壤过氧化氢酶活性呈先升后降趋势,与CF处理相比,OF和MF处理均可显著提高土壤脲酶、蔗糖酶和过氧化氢酶活性,第4季增幅分别为11.9%~18.4%、62.7%~129.1%和6.7%~6.8%。Pearson相关分析表明,3种土壤酶活性与2~5 mm和1~2 mm粒级团聚体含量、MWD及GMD呈正相关,与0.25~0.5 mm和<0.25 mm粒级团聚体含量呈负相关。【结论】与施用无机复合肥相比,连续2年4季施用生物有机肥对植烟根际土壤团聚体稳定性和关键酶活性有协同改善效应,施用复合微生物肥对植烟根际土壤团聚体稳定性改善作用不明显,而对土壤酶活性有明显促进效应。
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| 关 键 词： | 复合微生物肥 植烟土壤 团聚体稳定性 酶活性 |
| 收稿时间： | 2022-07-24 |
Effects of compound biofertilizer on aggregate stability and enzyme activity in tobacco-planting rhizosphere soil |
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| ZHOU Zheng-xiong,FENG Hao,DING Ji-lin,WANG Yuan-zhe,LI Zhang-hai,QI Yong-bo.Effects of compound biofertilizer on aggregate stability and enzyme activity in tobacco-planting rhizosphere soil[J].Journal of Southern Agriculture,2022,53(11):3088-3097. |
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| Authors: | ZHOU Zheng-xiong FENG Hao DING Ji-lin WANG Yuan-zhe LI Zhang-hai QI Yong-bo |
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| Affiliation: | 1. Zunyi Branch of Guizhou Tobacco Company, Zunyi, Guizhou 563000, China;2. School of Resources and Environment, Anhui Agricultural University, Hefei, Anhui 230036, China;3. Tobacco and Health Research Center, University of Science and Technology of China, Hefei, Anhui 230052, China |
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| Abstract: | 【Objective】To evaluate effects of compound biofertilizer application on tobacco-planting soil quality improvement,and to provide a scientific basis for development and application of compound biofertilizer for high-quality tobacco production.【Method】A 2-year cabbage-tobacco rotation fixed micro-plot experiment was conducted for 4 seasons.Taking no fertilization group was set as control(CK) to investigate the effects of the application of inorganic compound fertilizer(CF),bio-organic fertilizer(OF),and compound biofertilizer(MF) on aggregate stability and enzyme activity in the rhizosphere tobacco-planting soil.【Result】After 4 consecutive cropping seasons,the cumulative content of water-stable aggregates>0.25 mm,mean weight diameter(MWD),and geometric mean diameter(GMD) of each fertilizer treatment increased significantly compared to those of initial soil(P<0.05,the same below),in the order of OF>CF>MF;in OF treatment,the cumulative content of water-stable aggregates>0.25 mm increased significantly by 6.8% and 14.5%,the MWD increased by 7.9% and 36.1%,and the GMD increased by 10.5% and 32.2%,respectively,compared to CF and MF treatments. According to random forest analysis,content aggregates of 2-5 mm and >5 mm were the most important factors affecting MWD and GMD. Soil urease and sucrase activity increased while soil peroxidase activity increased and then decreased in each fertilizer treatment during 4 consecutive cropping seasons;compared to CF treatment,activity of soil urease,sucrase and catalase in OF and MF treatments increased significantly in the 4th season,with increases of 11.9%-18.4%,62.7%-129.1% and 6.7%-6.8%,respectively. Pearson correlation analysis showed that activity of 3 soil enzymes correlated positively with the content of water-stable aggregates of 2-5 mm and 1-2 mm,MWD,and GMD,while correlated negatively with the content of water-stable aggregates of 0.25-0.5 mm and <0.25 mm.【Conclusion】Compare with applying bio-organic fertilizer,applying inorganic compound fertilizer for 4 consecutive cropping seasons in 2 years could synergistically enhance the aggregate stability and enzyme activity. In addition,the application of compound biofertilizer in rhizosphere tobacco-planting soil does not obviously improve aggregate stability enzyme activity,yet significantly enhance enzyme activity. |
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