| 镉污染稻田土壤理化性质、微生物及酶活性的差异性分析 |
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| 引用本文： | 周利军,林小兵,武琳,黄欠如,俞莹,张鸿燕,郭乃嘉,张云,刘晖.镉污染稻田土壤理化性质、微生物及酶活性的差异性分析[J].环境工程,2020,38(10):202. |
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| 作者姓名： | 周利军 林小兵 武琳 黄欠如 俞莹 张鸿燕 郭乃嘉 张云 刘晖 |
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| 作者单位： | 1. 江西省红壤研究所 国家红壤改良工程技术研究中心, 江西 进贤 331717; |
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| 基金项目： | 江西省重点研发计划项目;国家重点研发计划 |
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| 摘 要： | 通过田间试验，分析了萍乡市2 hm2 Cd污染稻田中土壤理化性质、微生物和酶活性的空间差异性及相关性特征。结果表明:糙米Cd变异系数大于土壤有效态Cd和总Cd，且晚稻变异性大于早稻，属于中等变异性。土壤pH和容重变异系数较小，有机质、阳离子交换量、速效钾、有效磷和碱解氮变异系数为22.82%~35.60%，属于中等变异性；除过氧化氢酶变异性较小外，土壤酶活性、机械组成和微团聚体变异系数为10.54%~38.21%，属于中等变异性；土壤微生物（52.59%~84.64%）变异性较强，表现为细菌 > 放线菌 > 真菌。相关性分析表明:土壤pH、砂粒、蔗糖酶、酸性磷酸酶和过氧化氢酶与土壤有机质、阳离子交换量、黏粒、有效磷、速效钾、真菌和脲酶具有较强的负相关；而土壤有机质、阳离子交换量、黏粒、有效磷、速效钾、真菌和脲酶之间具有较强的正相关。主成分分析发现:pH、有机质、容重、速效钾和碱解氮是土壤理化性质的关键因子。
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| 关 键 词： | Cd污染 稻田 土壤理化性质 微生物 酶活性 空间变异性 |
| 收稿时间： | 2019-08-20 |
DIFFERENCES ANALYSIS ON PHYSICOCHEMICAL PROPERTITES,MICROBIAL AND ENZYME ACTIVITIES OF CADMIUM CONTAMINATED PADDY |
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| ZHOU Li-jun,LIN Xiao-bing,WU Lin,HUANG Qian-ru,YU Ying,ZHANG Hong-yan,GUO Nai-jia,ZHANG Yun,LIU Hui.DIFFERENCES ANALYSIS ON PHYSICOCHEMICAL PROPERTITES,MICROBIAL AND ENZYME ACTIVITIES OF CADMIUM CONTAMINATED PADDY[J].Environmental Engineering,2020,38(10):202. |
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| Authors: | ZHOU Li-jun LIN Xiao-bing WU Lin HUANG Qian-ru YU Ying ZHANG Hong-yan GUO Nai-jia ZHANG Yun LIU Hui |
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| Affiliation: | 1. Jiangxi Institute of Red Soil, National Engineering and Technology Research Center for Red Soil Improvement, Jinxian 331717, China;2. Agricultural Ecology and Resource Protection Station of Jiangxi, Nanchang 330046, China;3. Tiangong Fangyuan Construcion Group, Xinyu 338000, China |
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| Abstract: | A field experiment was conducted in 2 hm2 Cd contaminated paddy in Pingxiang, Jiangxi province, to study the spatial heterogeneity and correlation characteristics of soil physical and chemical properties, microbes and enzyme activities. The results showed that the variation coefficient of Cd in brown rice was larger than available Cd and total Cd in soil, and the variability of late rice was higher than that of early rice, which was with moderately variability. The coefficients of variation of pH and bulk density in soil was small, and the coefficients of variation of organic matter, cation exchange capacity, available potassium, available phosphorus and alkali nitrogen were in range of 22.82%~35.60%, with moderate variability. In addition to the variability of catalase was smaller, the variation coefficient of enzyme activity, mechanical composition and microaggregate in soil was 10.54%~38.21%, which was with moderate variability. The variability of microbes in soil was strong (in range of 52.59%~84.64%), in the sequence of bacteria > actinomycetes > fungi. Correlation analysis showed that pH, sand, invertase, acid phosphatase and catalase in soil had strong negative correlation with organic matter, cation exchange capacity, clay, available phosphorus, available potassium, fungi and urease in soil. While, there was a strong positive correlation between organic matter, cation exchange capacity, cosmid, available phosphorus, available potassium, fungi and urease. Principal component analysis results indicated that pH, organic matter, bulk density, available potassium and alkali nitrogen were key factors in soil physical and chemical properties. |
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