| 接种蚯蚓与添加有机物料对茶园土壤结构的影响 |
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| 引用本文： | 程思远,李欢,梅慧玲,王炫清,刘馨秋,陈暄,马青平,黎星辉.接种蚯蚓与添加有机物料对茶园土壤结构的影响[J].土壤学报,2021,58(1):259-268. |
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| 作者姓名： | 程思远 李欢 梅慧玲 王炫清 刘馨秋 陈暄 马青平 黎星辉 |
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| 作者单位： | 南京农业大学茶叶科学研究所, 南京 210095;江苏省农业科学院休闲农业研究所, 南京 210095;南京农业大学国家有机类肥料工程技术研究中心, 南京 210095 |
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| 基金项目： | 国家自然科学基金项目（31800590）、现代农业产业技术体系建设专项资金（CARS-19）和江苏高校优势学科建设工程资助项目资助 |
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| 摘 要： | 蚯蚓通过取食、排泄、分泌黏液、挖掘洞穴等活动,可显著改善土壤结构,提高土壤肥力。为探究蚯蚓与有机物料不同配施方式对茶园土壤肥力的调控效果与机理,设计5个处理组:不施肥(CK),不施肥+蚯蚓(BE),菜籽饼+蚯蚓(CE),茶树修剪物+蚯蚓(JE),生物质炭+蚯蚓(TE),分别进行室内模拟实验。结果显示,与不施肥(CK)相比,接种蚯蚓(BE)处理使土壤的总碳含量呈升高趋势;添加有机物料(CE、JE、TE)三个处理的土壤的全碳、全氮含量、有机质含量均高于BE组,其中TE处理最高。单独接种蚯蚓处理可提高土壤总有机质含量,接种蚯蚓配施有机物料对提高土壤肥力有明显作用,其中茶生物质炭与蚯蚓共同作用效果最好。经过3个月的培养,5个处理中土壤pH均呈降低趋势,其中BE组pH降低最大(6.81到5.82)。在采用同步辐射红外显微成像技术(SR-FTIR)对土壤微团聚体中矿物-有机复合体进行表征后,结果显示土壤团聚体中多糖、蛋白质、脂肪和黏土矿物均呈高度异质性分布,CE和JE组中黏土矿物与大分子有机物具有较高的分散性;黏土矿物与多糖的分布模式较为相似,而黏土矿物与蛋白质类物质、脂肪的分布模式有较大差异,且这种分布模式不受蚯蚓与有机物料互作的影响。各处理土壤团聚体的黏土矿物和有机官能团的相关性决定系数R2由小到大均依次为:黏土矿物-蛋白质、黏土矿物-多糖、黏土矿物-脂肪,表明黏土矿物与大分子有机物的亲和性有差异,且不受蚯蚓与有机物料互作的影响。
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| 关 键 词： | 蚯蚓 有机物料 矿物-有机复合体 同步辐射红外显微成像 |
| 收稿时间： | 2019/11/4 0:00:00 |
| 修稿时间： | 2020/3/14 0:00:00 |
Effects of Earthworms and Organic Materials on Soil Structure in Tea Plantation |
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| CHENG Siyuan,LI Huan,MEI Huiling,WANG Xuanqing,LIU Xinqiu,CHEN Xuan,MA Qingping,LI Xinghui.Effects of Earthworms and Organic Materials on Soil Structure in Tea Plantation[J].Acta Pedologica Sinica,2021,58(1):259-268. |
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| Authors: | CHENG Siyuan LI Huan MEI Huiling WANG Xuanqing LIU Xinqiu CHEN Xuan MA Qingping LI Xinghui |
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| Institution: | Tea Research Institute, Nanjing Agricultural University, Nanjing 210095, China;Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210095, China;National Agricultural Fertilizer Engineering Technology Research Center, Nanjing Agricultural University, Nanjing 210095, China |
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| Abstract: | 【Objective】Earthworms in the soil may help improve soil structure and fertility significantly through activities,like feeding,excreting,mucus secreting,excavating,etc.To explore the effects of earthworms as affected by application of organic materials of different kinds on the soil of a tea plantation,a pot experiment,designed to have five treatments,i.e.(i)no fertilizer input(CK),(ii)earthworms only(BE),(iii)rapeseed cake plus earthworms(CE),(iv)tea tree pruning plus earthworms(JE),and(v)biochar plus earthworms(TE),was conducted with tea trees planted in each of the pots(30 cm in diameter and 35 cm in height).【Method】Three months after the start of the experiment,soil samples were collected from each of the pots for analysis,after being air dried.Soil pH was measured using a pH meter;concentrations of soil organic carbon(SOC)and total nitrogen(TN)were quantified with a CN analyzer(Vario EL,Elementar GmbH);mineral-organic complex in soil microaggregates were characterized with the synchrotron radiation infrared micro-imaging method;intact particles(100-500 mm),varying in shape,were screened out with a 2-mm-sieve,frozen at-20℃,and then prepared with a cryomicrotome(Cyrotome E,Thermo Shandon Limited,UK)into thin sections(2μm in thickness),which were eventually transferred into infrared-reflecting MirrIR Low-E microscope Slides(Kevley Technologies,Ohio,USA).Then distribution of SOCs of various forms and clay minerals(OH)was determined with the aid of Synchrotron radiation-based Fourier-transform infrared spectromicroscopy.【Result】Results show that Treatment BE was higher than CK in content of soil total carbon in,but lower than in Treatment CE,JE and TE in content of total carbon,total nitrogen and organic matter;and Treatment TE group was the highest.Earthworm inoculation alone(Treatment CE)increased total carbon and organic matter content in the soil,and addition of organic materials(Treatment JE and TE)enhanced the effect,and addition of tea biochar(Treatment TE)had the best effect.All the treatments showed a decreasing trend in soil pH,and the trend was especially significant in Treatment BE(from 6.81 to 5.82).Furthermore,the synchrotron radiation microzone infrared spectra demonstrated that polysaccharides,proteins,fats and clay minerals in soil aggregates were highly heterogeneous.Clay minerals and macromolecular organics in Treatment CE and JE were highly dispersed.Minerals and polysaccharides were quite similar while clay minerals,protein and fat were quite different in distribution,and their distributions were had nothing to do with any interactions between earthworms and organic materials.Correlation analysis between clay minerals and organic functional groups shows that the correlation coefficients of clay minerals and organic functional groups in the five fractions of soil aggregates followed an increasing trends:clay minerals-protein
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| Keywords: | Earthworm Organic materials Mineral-organic complex Synchrotron radiation infrared micro-imaging |
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