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当前位置: 首页 > 文章 > 过碳酰胺在酸碱性土壤中的转化特征 农业环境科学学报 2006,25 (03) 174-179
Position: Home > Articles > Transformation Character of Percarbamide in Acidity and Alkalinity Soil Journal of Agro-Environment Science 2006,25 (03) 174-179

过碳酰胺在酸碱性土壤中的转化特征

作  者：
钟宁;曾清如;廖柏寒;姜洁凌;周细红;杨成建
单  位：
湖南农业大学动物科技学院;湖南农业大学环境科学系
关键词：
过碳酰胺;土壤;pH;氨气挥发;过碳酰胺N转化;交换性Al
摘  要：
采用静态试验和动态试验法,研究了3种酸性土壤和3种碱性土壤中施入过碳酰胺对土壤pH值变化、氨挥发特性、氮素转化及Al元素活性的影响。结果表明,土壤酸碱性对过碳酰胺水解的影响与过碳酰胺浓度有关。常温下,酸性土壤的pH值在短期内都随着加入过碳酰胺浓度的增大而急剧升高,而碱性土壤的pH值却是随着加入过碳酰胺浓度的增加先升高再降低然后又升高。动态试验表明,pH值升高的现象是短期的,6种土壤pH值达到最大值后缓慢下降,2周后3种碱性土壤的pH降到比原来更低的程度。氨挥发强度与pH变化同步,在酸性土壤和碱性土壤中,氨气日挥发量都是从小到大出现峰值,然后又降低。酸性土壤氨挥发强度峰值在第7d左右出现,碱性土壤的氨挥发强度峰值在第3d左右出现。各处理NH4+-N含量和NO-3-N含量在前2￣4周增加到峰值,而后开始下降并保持不变。短期内,交换性Al随着过碳酰胺浓度的增大而急剧下降,交换性Al含量与土壤pH变化呈显著负相关。
译  名：
Transformation Character of Percarbamide in Acidity and Alkalinity Soil
作  者：
ZHONG Ning1, ZENG Qing-ru1, LIAO Bo-han1, JIANG Jie-ling2, ZHOU Xi-hong1, YANG Cheng-jian1 (1.College of Resources and Environment, Hunan Agriculture University, Changsha 410128, China; 2.College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China)
关键词：
percarbamide; soil; pH; volatilization of ammonia; percarbamide -N transformation; exchangeable Al
摘  要：
Percarbamide is an important chemical product and a new fertilizer, and has been used in china in recently years. Changes of pH, volatilization of ammonia, percarbamide -N transformation and active Al in 3 acidic soils and 3 alkali soils caused by percarbamide application were studied. The results indicated that:effects of acidity and alkalinity of soil on percarbamide hydrolysis were correlated with the concentration of percarbamide. At 25 ℃, the changes of pH in acidic soils increased quickly , while the changes of pH in alkali soils increased first, then fell, rose again, with the increasing concentrations of applied percarbamide. The time-course experiment revealed that the increase of soil pH was short-term, with a subsequently slow drop after reached their maximum, and pH of 3 alkali soils were less than original after 2 weeks. Ammonia volatilization intensity, NH-N and NO-N were greatly similar to soil pH, they followed the changes of soil pH:rose to maximum, and then fell between 3 acidic soils and 3 alkali soils. The maximum of ammonia volatilization intensity in 3 acidic soils and 3 alkali soils had persisted for 7th day and third day respectively; NH-N and NO-N in 6 soils rose to maximum after 2~4 weeks, then dropped and kept constant value. Soil exchangeable Al decreased sharply with the increasing concentrations of percarbamide in 3 acidic soils, and there was a significant negative relationship between soil exchangeable Al and soil pH in a short-term period.

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