施用石灰和钙蒙脱土对酸性土壤硝化动力学的影响。

Q3 Agricultural and Biological Sciences

农业资源与环境学报 Pub Date : 2017-01-01 DOI:10.13254/J.JARE.2016.0226

Wang Mei, Jiang Xian-jun

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引用次数: 6

摘要

王梅，姜先军*(西南大学资源与环境学院，重庆400716)摘要:土壤酸化是一个伴随着粘土矿物风化作用的自然缓慢过程。近年来，随着农业对土壤的集约化利用，土壤酸化急剧加剧，而铵态氮肥的硝化作用是土壤酸化的主要原因之一。施石灰是改善酸性土壤的传统做法，但在大多数情况下，它往往使土壤酸化，导致土壤压实。蒙脱石是碱性或中性土壤的主要粘土矿物成分，在土壤酸化过程中，蒙脱石还会经历进一步的风化过程。本研究采用室内培养法，测定了氮化作用，拟合了动力学曲线，考察了石灰(Ca-OH)和蒙脱土(Ca-M)降低土壤酸度对酸性土壤硝化作用的影响。结果表明，Ca-OH和Ca-M处理均有显著的硝化作用，且硝化过程符合一级动力学模型NNO3=N0+Np (1-exp(-k1t))(P<0.001)。Ca-OH处理的净硝化速率(3.429 mg·kg-1·d-1)显著高于Ca-M处理(2.381 mg·kg-1·d-1)。pH为5.7和6.2时，潜在硝化速率(vp)分别为6.42、8.58 mg N·kg-1·d-1, Ca-OH处理的平均硝化速率(va)分别为2.71、3.88 mg N·kg-1·d-1，显著高于Ca-M处理(vp分别为3.40、4.56 mg N·kg-1·d-1, va分别为2.36、3.04 mg N·kg-1·d-1)。因此,净硝化速率、潜在的硝化速率(V p)王梅,蒋先军。施用石灰与钙蒙脱石对酸性土壤硝化动力学过程的影响[J]。农业资源与环境学报, 2017, 34(1): 47-53. 王梅，蒋先军。施用石灰和钙蒙脱土对酸性土壤硝化动力学的影响[J]。农业资源与环境学报，2017,34(1):47-53。

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Effects of applying lime and calcium montmorillonite on nitrification dynamics in acidic soil.

Effects of Applying Lime and Calcium Montmorillonite on Nitrification Dynamics in Acidic Soil WANG Mei, JIANG Xian-jun * (College of Resources and Environment, Southwest University, Chongqing 400716, China) Abstract: Soil acidification is known as a natural and slow process along with clay mineral weathering. In recent years however, with inten原 sive soil utilization in agriculture, soil acidification has increased dramatically and nitrification of ammonium nitrogen fertilizer is one of the main contributors to soil acidification. Lime application is the traditional practice to improve acidic soils but it often makes the soil acidic a原 gain leading to soil compaction in most cases. Montmorillonite is the main clay mineral component of alkaline or neutral soils, more so it is known to undergo further weathering processes during soil acidification. The laboratory-based incubations were used in this study, and nitri原 fication was measured while kinetic curves were fitted to check the effects of decreasing soil acidity by lime(Ca-OH)and montmorillonite (Ca-M)on nitrification of the acidic soil. The results showed that significant nitrification was observed both in Ca-OH and Ca-M treatments, and the nitrification process was fitted in the first-order kinetic model, NNO3=N0+Np (1-exp(-k1t))(P<0.001). The net nitrification rate of Ca-OH treatment(3.429 mg·kg-1·d-1)was significantly higher than that of Ca-M treatment (2.381 mg·kg-1·d-1). The potential nitrifi原 cation rate(V p)were 6.42, 8.58 mg N·kg-1·d-1 at pH 5.7 and 6.2 respectively, and the average nitrification rate(V a)of Ca-OH treatment were 2.71, 3.88 mg N·kg-1·d-1 respectively, which were significantly greater than those of Ca-M treatment(V p were 3.40, 4.56 mg N·kg-1·d-1 and V a were 2.36, 3.04 mg N·kg-1·d-1 at pH 5.7 and 6.2 respectively). Therefore the net nitrification rate, potential nitrification rate(V p) 王梅,蒋先军.施用石灰与钙蒙脱石对酸性土壤硝化动力学过程的影响[J].农业资源与环境学报, 2017, 34(1): 47-53. WANG Mei, JIANG Xian-jun. Effects of Applying Lime and Calcium Montmorillonite on Nitrification Dynamics in Acidic Soil[J]. Journal of Agricultural Resources and Environment, 2017, 34(1): 47-53.

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来源期刊

农业资源与环境学报 Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)

CiteScore

1.90

自引率

0.00%

发文量

4438

审稿时长

24 weeks

期刊介绍： Journal of Agricultural Resources and Environment (CN 12-1437/S, ISSN 2095-6819) is a national academic scientific and technical journal. It was founded in 1984, and used to be called Foreign Agricultural Environmental Protection and Agricultural Environment and Development. It is supervised by the Ministry of Agriculture and Rural Affairs, and co-sponsored by the Scientific Research and Monitoring Institute of Environmental Protection of the Ministry of Agriculture and Rural Affairs, and the China Association of Agricultural Ecological Environmental Protection. The journal is one of China's high-quality science and technology journals, China Science Citation Database (CSCD) core journals, Peking University Chinese core journals, China Science and Technology core journals, China Agricultural and Forestry core journals, and Tianjin Outstanding Journals. It is included in the international authoritative databases, such as Scopus database of the Netherlands, the database of the Center for International Agricultural and Biological Sciences Research (CABI) of the United Kingdom, the Stephens Database (EBSCOhost) of the United States, the Ulrichsweb (Ulrich's Guide to Journals) of the United States, EuroPub of the United Kingdom, the Abstracts Journal (AJ) of the Russian Federation, and the Copernicus Index (IC) of the Poland, and so on.