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Effects of Applying Lime and CalciumMontmorillonite on Nitrification Dynamics in Acidic Soil

Wang, Mei ; Xian-Jun, Jiang

Journal of agricultural resources and environment, 2017-01, Vol.34 (1), p.47 [同儕審閱期刊]

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題名:
Effects of Applying Lime and CalciumMontmorillonite on Nitrification Dynamics in Acidic Soil
著者: Wang, Mei ; Xian-Jun, Jiang
主題: Acidic soils ; Acidification ; Acidity ; Ammonium ; Bacteria ; Biochemistry ; Biology ; Calcium ; Clay ; Clay minerals ; Ecology ; Fertilizers ; Lime ; Mineralization ; Mineralogy ; Montmorillonite ; Nitrates ; Nitrification ; Nitrogen ; Nutrition ; pH ; pH effects ; Science ; Soil compaction ; Soil dynamics ; Soil improvement ; Soil lime ; Soil sciences ; Weathering
所屬期刊: Journal of agricultural resources and environment, 2017-01, Vol.34 (1), p.47
描述: 土壤酸化是粘土矿物缓慢风化的自然过程，但近年来随着人类高强度的农业利用，土壤酸化现象逐渐加剧，而铵态氮肥的硝化作用是土壤酸化的主要贡献者之一。传统的施用石灰改良酸性土壤，常常会有反酸现象，并可能导致土壤板结。蒙脱石是碱性或中性土壤的主要粘土矿物组分，而在土壤酸化的过程中，蒙脱石被进一步风化掉。本文通过室内模拟实验，采用硝化动力学拟合及对净硝化速率的计算，分别研究了蒙脱石（Ca-M）和石灰（Ca-OH）对酸性黄壤硝化作用的影响。结果表明：酸性黄壤添加石灰或蒙脱石后，土壤均发生了显著的硝化作用，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 处理土壤样品的净硝化速率（3.429 mg·kg-1·d-1）显著大于Ca-M处理（2.381 mg·kg-1·d-1）；Ca-OH 处理土壤样品的潜在硝化速率（Vp）和平均硝化速率（Va）在pH 值5.7 和6.2 时分别为6.42、8.58 mg N·kg-1·d-1和2.71、3.87 mg N·kg-1·d-1，均显著大于钙基蒙脱石处理（pH 值5.7 和6.2 时分别为3.40、4.56 mg N·kg-1·d-1和2.36、3.04 mg N·kg-1·day-1）。结果表明采用石灰改良酸性土壤发生复酸化现象的可能性及程度大于钙基蒙脱石，本研究为酸性土壤改良提供了新的参考。 Soil acidification is known as a natural and slow process along with clay mineral weathering. In recent years however, with inten 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 g
出版者: Tianjin: Journal of Agricultural Resources and Environment (JARE)
語言: 中文
識別號: ISSN: 2095-6819
EISSN: 2095-6819
DOI: 10.13254/j.jare.2016.0226
資源來源: Publicly Available Content Database
Alma/SFX Local Collection
Agricultural & Environmental Science Collection

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Effects of Applying Lime and CalciumMontmorillonite on Nitrification Dynamics in Acidic Soil

Wang, Mei ; Xian-Jun, Jiang

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