The soil net mineralized nitrogen amount and nitrogen mineralization rates along a soil moisture gradient in a riparian area in Taihu Lake were examined using random block experimental design and incubation method. The soil samples were put in PVC tube and incubated at 5, 15, 25, and 35 ℃,respectively for 30 days. The results showed that the soil mineralized nitrogen amount, net nitrogen nitrification rate and mineralization rates increased significantly with increasing temperature. At the same temperature, the soil mineralized nitrogen amount, net nitrogen nitrification rate and mineralization rates increased with distance from the water body. The Q10 value of soil nitrogen mineralization fluctuated between 1.16 and 1.55. There was no obvious regularity of the Q10 value of soil N mineralization with distance from the water body. The experiments showed that soil mineralization nitrogen in the riparian zone would be greatly influenced by soil temperature change.
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References
[1]孙志高,刘景双,王金达,等.湿地生态系统土壤氮素矿化过程研究动态[J].土壤通报,2007,38(1):155-161.
[2]Andrew E P,Ralph E J,Boerner J L, et al. Relative nitrogen mineralization and nitrification in soils of two contrasting hardwood forests: Effects of site microclimate and initial soil chemistry[J]. Forest Ecology and Management,1987,21:21-36.
[3]冯育青,陈月琴,阮宏华,等.苏州太湖湖滨带不同水分梯度土壤氮的时空变异特征[J].华东森林经理,2010,24(1):7-14.
[4]周才平,欧阳华.温度和湿度对长白山两种林型下土壤氮矿化的影响[J].应用生态学报,2001,12(4):505-508.
[5]李检舟,沙丽清,王君,等.云南哀牢山中山湿性常绿阔叶林土壤氮矿化季节变化[J].山地学报,2006,24(2):186-192.
[6]Bremere E, Kuiman P. Influence of competition for nitrogen in soil on net mineralization of nitrogen[J].Plant and Soil,1997，190:119-126.
[7]巨晓棠,李生秀.土壤氮素矿化的温度水分效应[J].植物营养与肥料学报,1998,4(1):37-42.
[8]田茂洁.土壤氮素矿化影响因子研究进展[J].西华师范大学学报:自然科学版,2004,25(3):300-303.
[9]王常慧,邢雪荣,韩兴国.草地生态系统中土壤氮素矿化影响因素的研究进展[J].应用生态学报,2004,15(11):2184-2188.
[10]李贵才,韩兴国.森林生态系统土壤氮矿化影响因素研究进展[J].生态学报,2001,21(7):1187-1195.
[11]Dalias P,Anderson J M,Bottner P,et al. Temperature responses of net mineralization and nitrification in conifer forest soil incubated under standard laboratory conditions[J]. Soil Biology and Biochemistry,2002,34(5):691-701.
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