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土壤硝化作用过程中亚硝态氮的累积研究
引用本文:冉炜,沈其荣,郑金伟,曹志洪.土壤硝化作用过程中亚硝态氮的累积研究[J].土壤学报,2000,37(4):474-481.
作者姓名:冉炜  沈其荣  郑金伟  曹志洪
作者单位:1. 南京农业大学资源与环境科学学院,南京 210095
2. 中国科学院南京土壤研究所,南京 210008
基金项目:国家重点基础研究发展规划项目(G1999011806)
摘    要:在实验室条件下比较了9种土壤硝化过程中NO2^-的累积能力和NO2^-在不同土壤中的稳定性,并在3种代表性土壤上检测了NO2^-累积的动态变化。结果表明,红壤和黄棕壤在所有施氨(NH4^+-N)水平下均未出现NO2^-的累积;但砂姜黑土、潮土、滨海盐士、潮棕壤、褐土、灌漠土和灰钙土等均出现不同程度的NO2^-累积,且随着施NH4^+-N水平提高而增加NO3^-在红壤和黄棕壤中的累积与施NH4^+-N水平无关,但在其它7种pH大于7的土壤中的累积受到浓度NH4^+的抑制。此外,试验还表明,NO2^-在红壤和黄棕壤中不稳定,但在其它7种土壤中相当稳定。土壤硝化过程中产生NO2^-累积的问题应引起重视。

关 键 词:亚硝酸盐累积  硝化作用  土壤  稳定性
收稿时间:2000/3/29 0:00:00
修稿时间:2000年3月29日

NITRITE ACCUMULATION IN THE PROCESS OF NITRIFICATION IN DIFFERENT AGRICULTURAL SOILS OF CHINA
Ran Wei,Sheng Qi-rong,Zheng Jin-wei and Cao Zhi-hong.NITRITE ACCUMULATION IN THE PROCESS OF NITRIFICATION IN DIFFERENT AGRICULTURAL SOILS OF CHINA[J].Acta Pedologica Sinica,2000,37(4):474-481.
Authors:Ran Wei  Sheng Qi-rong  Zheng Jin-wei and Cao Zhi-hong
Institution:College of Natural Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;College of Natural Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;College of Natural Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
Abstract:Laboratory work had been conducted to evaluate NO-2 and NO-3 accumulation capacity in the process of nitrification in 9 Chinese agricultural soils, and to investigate stability of NO-2 in the 9 soils. Dynamic procedure was also done to observe the duration of NO-2 in 3 soils of different properties and locations at the same NH+4 levels. Results showed that acid and fine-textured soils, Red earth and Yellow-brown earth, had no NO-2 accumulation at all NH+4 levels, while alkaline or calcareous soils, such as Sajiang black soil, Fluvo-aquic soil, Coastal solonchaks, Cinnamon soil, Irrigated desert soil, and Sierozem had significant NO-2 accumulation. NO-2 accumulation in each soil of pH>7 increased with the elevation of NH+4 levels.NO-3 in 2 acid soils was independent of the NH+4 levels, but in the other 7 soils inhibited by high NH+4 input. It was found that NO-2 was unstable in acid soils, but durable in alkaline soils or even in neutral soils. The results obtained in the study showed that NO-2 accumulation in the process of nitrification in soils with pH more than 7 should attract more attention.
Keywords:Nitrite accumulation  Nitrification  Soil
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