Abstract：The nitrification process of salt-affected soil was studied through a laboratory incubation experiment at three soil moisture levels(50%, 75% and 100% of field capacity(FC))and four salinity levels(0.8, 3.0, 6.0 and 15.0 g/kg). The results showed that the NH+4-N consumption rates and the NO-3-N production rates increas significantly with increasing soil moisture, and ammonia oxidation and nitrite oxidation are promoted at higher soil moistures(75%FC and 100%FC)compared with 50%FC. In 3.0 and 6.0 g/kg treatments, the inhibition of soil salinity on nitrite oxidation is significantly stronger than that of ammonia oxidation, which accounts for NO-2-N accumulation. However, in 15.0 g/kg treatment, changes in the concentration of NH+4-N, NO-3-N and NO-2-N all remain at a low level, and a high soil salinity seriously inhibits both ammonia oxidation and nitrite oxidation. The non-synchronous response of ammonia oxidation and nitrite oxidation to soil salinity significantly affects the forms and transformation process of inorganic nitrogen in soil.
李亚威,, 徐俊增,, 卫琦,, 百文焕,, 李坤霖,, 刘笑吟,*. 不同水盐条件下盐渍土硝化过程特征[J]. 排灌机械工程学报, 2018, 36(9): 909-913.
LI Yawei,, XU Junzeng,, WEI Qi,, BAI Wenhuan,, LI Kunlin,, LIU Xiaoyin,*. Soil nitrification process under different soil moisture and salinity conditions. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(9): 909-913.
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