吊罗山青皮林土壤硝化-反硝化作用及其影响因素
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摘要
采用5点取样法对海南岛吊罗山自然保护区内单优青皮林森林土壤进行取样,分析海拔高度、土层深度、季节及土壤理化性质对土壤的硝化-反硝化作用影响因素。结果表明:海拔高度及土层深度对硝化-反硝化作用影响不同;季节对其有显著影响(p<0.05),雨季土壤的硝化-反硝化作用强度是旱季的几十至上百倍;土壤理化性质对土壤硝化作用没有影响(p>0.05),但全磷、全钾、有效磷、速效钾和含水率均与反硝化作用强度呈显著负相关(p<0.05)。以上结果说明,在研究区青皮林土壤氮素转化过程中,季节是重要影响因素,土壤部分理化性质是反硝化作用的重要影响因素。
5 point sampling method was adopted to take soil sample in the Vatica mangachapoi single-species-dominated forest of Diaoluoshan Nature Reserve,Hainan Island. The effects of altitude,soil layer depth,season and soil physical & chemical properties on the soil intensity of nitrification-denitrification were analyzed. The results showed that the altitude and soil layer depth had no significant effect on the soil nitrification-denitrification( p > 0. 05). The season had a significant effect on them( p < 0. 05),of which the soil intensity of the nitrification-denitrification in a rainy season was dozens to a hundred times higher than that in a dry season. The soil physical & chemical properties had no effects on soil nitrification intensity( p > 0. 05),but the total phosphorus,total potassium,available phosphorus,available potassium and moisture content were significantly negative related to the soil intensity of denitrification( p < 0. 05).This suggests that the season is an important influence factor,and part of soil physical & chemical properties are one of the important factors affecting soil denitrification intensity in the process of soil nitrogen transformation in the research area.
5 point sampling method was adopted to take soil sample in the Vatica mangachapoi single-species-dominated forest of Diaoluoshan Nature Reserve,Hainan Island. The effects of altitude,soil layer depth,season and soil physical & chemical properties on the soil intensity of nitrification-denitrification were analyzed. The results showed that the altitude and soil layer depth had no significant effect on the soil nitrification-denitrification( p > 0. 05). The season had a significant effect on them( p < 0. 05),of which the soil intensity of the nitrification-denitrification in a rainy season was dozens to a hundred times higher than that in a dry season. The soil physical & chemical properties had no effects on soil nitrification intensity( p > 0. 05),but the total phosphorus,total potassium,available phosphorus,available potassium and moisture content were significantly negative related to the soil intensity of denitrification( p < 0. 05).This suggests that the season is an important influence factor,and part of soil physical & chemical properties are one of the important factors affecting soil denitrification intensity in the process of soil nitrogen transformation in the research area.
引文
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[3]Keeney D R.Prediction of soil nitrogen availability in forest ecosystems:a literature review[J].For.Sic.,1980,26:159-171.
[4]Stanford G,Smith J S.Nitrogen mineralization potentials of soils[J].Soil Sic.Soc.Amer.J.,1972,36:465-472.
[5]Badr O,Probert S D.Environmental impacts of atmospheric nitrous oxides[J].Applied Energy,1993,44:197-231.
[6]王峥峰,安树青,Campell D G,等.海南岛吊罗山山地雨林物种多样性[J].生态学报,1999,19(1):61-67.
[7]龙文兴,杨小波,罗涛,等.海南岛吊罗山地区珍稀濒危植物区系研究[J].福建林业科技,2007,34(4):118-123.
[8]傅立国.国家重点保护野生植物名录(第一批)[J].植物杂志,1995(5):4-11.
[9]郝清玉,刘淑菊,钟琼芯,等.海南岛不同海拔高度青皮林群落结构与多样性[J].林业资源管理,2012(4):48-54.
[10]郝清玉,刘淑菊.石梅湾青皮林群落结构及天然更新特征[J].林业资源管理,2010(2):54-59.
[11]林先贵.土壤微生物研究原理与方法[M].北京:高等教育出版社,2010.
[12]苗方琴,康峰峰,赵秀海.森林土壤硝化、反硝化作用研究进展[J].河北林果研究,2010(2):124-127.
[13]刘义,陈劲松,刘庆,等.土壤硝化和反硝化作用及影响因素研究进展[J].四川林业科技,2006(2):36-41.
[14]Breuer L,Kiese R,Butterbach-Bahl K.Temperature and moisture effects on nitrification rates in tropical rain forest soils[J].Soil Science Society American Journal,2002,66:834-844.
[15]张仕艳,原海红,陆梅,等.澜沧江上游不同植被类型土壤微生物特征研究[J].水土保持研究,2011(4):179-182.
[16]孟好军,刘贤德,金铭,等.祁连山不同森林植被类型对土壤微生物影响的研究[J].土壤通报,2007(6):1127-1130.
[17]柳云龙,施振香,卢小遮,等.上海城郊大棚蔬菜地土壤总硝化与反硝化作用研究[J].长江流域资源与环境,2011(5):592-596.
[18]黄国宏,陈冠雄.土壤含水量与N2O产生途径研究[J].应用生态学报,1999,10(1):53-56.
[19]Yoshinari T,Hynes R,Knowles R.Acetylene inhibition of nitrous oxide reduction and measurement of denitrification and nitrogen fixation in soil[J].Soil Biology and Biochemistry,1979,9:177-183.