崩岗区不同植被覆盖度对土壤氮素含量的影响
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摘要
不同植被覆盖度土壤氮素含量变化规律的研究可作为评价生态退化区植被恢复的指标之一。以福建省长汀县濯田镇黄泥坑崩岗群中三种不同植被覆盖度的毗邻崩岗为研究对象,比较其氮素含量的变化及不同部位氮素含量的变化规律。结果表明:植被覆盖度的提高能有效地减少土壤侵蚀,且与土壤的全氮含量及各部位的全氮含量均达到显著正相关,但同时也会增加硝态氮和铵态氮的流失,从而导致土壤中硝态氮、铵态氮的含量反而减少。而这三种不同植被覆盖度崩岗的全氮含量最高值均出现在集水坡面部位。与裸露崩岗和低覆盖崩岗不同的是,高覆盖崩岗的硝态氮与铵态氮的最大值也均出现在集水坡面部位。
The rule of soil nitrogen content change affected by different vegetations coverage can be used as one of the indicators for evaluating the effects of vegetation restoration in ecological degradation area. The nitrogen contents in three Benggangs in Huangnikeng, Zhuotian town, Changting county of Fujian province covered by different vegetations, were measured for revealing the nitrogen changes in different parts of the Benggang system under different vegetations. The results show that each part of the total soil nitrogen content and total nitrogen content had a significant positive correlation with the increase of vegetation coverage. Increasing vegetable cover on soil was an available method of controlling soil erosion and increasing the soil total nitrogen content. Nevertheless, it might increase the loss of soil nitrate nitrogen and ammonium nitrogen which led to the decrease of the content. The total soil nitrogen of three Benggangs showed the highest in the water collecting hill slope under the same vegetation. The nitrate nitrogen and ammonium nitrogen also showed the highest content in the water collecting hill slope in Benggang Ⅲ.
The rule of soil nitrogen content change affected by different vegetations coverage can be used as one of the indicators for evaluating the effects of vegetation restoration in ecological degradation area. The nitrogen contents in three Benggangs in Huangnikeng, Zhuotian town, Changting county of Fujian province covered by different vegetations, were measured for revealing the nitrogen changes in different parts of the Benggang system under different vegetations. The results show that each part of the total soil nitrogen content and total nitrogen content had a significant positive correlation with the increase of vegetation coverage. Increasing vegetable cover on soil was an available method of controlling soil erosion and increasing the soil total nitrogen content. Nevertheless, it might increase the loss of soil nitrate nitrogen and ammonium nitrogen which led to the decrease of the content. The total soil nitrogen of three Benggangs showed the highest in the water collecting hill slope under the same vegetation. The nitrate nitrogen and ammonium nitrogen also showed the highest content in the water collecting hill slope in Benggang Ⅲ.
引文
[1]梁音,宁堆虎,潘贤章,等.南方红壤区崩岗侵蚀的特点与治理[J].中国水土保持,2009,(01):31–34.
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[12]梁丽,赵梅.施肥与植被覆盖对坡地铵态氮流失的影响[J].南方农业学报,2012,43(12):1986–1990.
[13]席颖,贾国梅,王旭,等.三峡库区不同植被覆盖对土壤氮的影响[J].湖北农业科学,2016,55(16):4113–4116.
[14]周媛媛,杜明新,周向睿,等.毛乌素沙漠南缘紫穗槐根际与非根际氮素含量特征[J].草业科学,2013,30(04):515–520.
[15]陈海滨,马秀丽,陈志彪,等.南方稀土矿区水土保持植物根际土壤碳氮及pH特征[J].土壤学报,2016,53(05):1334–1340.
[16]张兴昌,邵明安,付会芳.多年生黑麦草草地矿质氮淋溶与径流流失的关系[J].草地学报,2000,8(02):82–87.
[17]李菊梅,王朝辉,李生秀.有机质、全氮和可矿化氮在反映土壤供氮能力方面的意义[J].土壤学报,2003,40(02):232–238.
[18]陈怀满,等.环境土壤学[M].北京:科学出版社,2015:113–119.
[19]张亚丽,张兴昌,邵明安,等.降雨强度对黄土坡面矿质氮素流失的影响[J].农业工程学报,2004,20(3):55–58.
[2]孙波.红壤退化阻控与生态修复[M].北京:科学出版社,2011:309.
[3]肖胜生,杨洁,方少文,等.南方红壤丘陵崩岗不同防治模式探讨[J].长江科学院院报,2014,31(01):18–22.
[4]赵健.江西省崩岗侵蚀与形成条件[J].水土保持应用技术,2006,(05):16–17.
[5]杨长青,梁漫.川西低山丘陵区不同植被恢复模式对土壤氮素含量的影响[J].四川林勘设计,2012,12(04):6–11.
[6]张兴昌,邵明安,黄占斌,等.不同植被对土壤侵蚀和氮素流失的影响[J].生态学报,2000,20(06):1038–1044.
[7]张兴昌,刘国彬,付会芳.不同植被覆盖度对流域氮素径流流失的影响[J].环境科学,2000,11(06):16–19.
[8]董贵青,张养安.黄土丘陵沟壑区不同植被覆盖对土壤氮素的影响[J].水土保持研究,2009,16(05):190–193.
[9]邢肖毅,黄懿梅,安韶山,等.黄土丘陵区不同植被土壤氮素转化微生物生理群特征及差异[J].生态学报,2013,33(18):5608–5614.
[10]胡宁,马志敏,蓝家程,等.石漠化山地植被恢复过程土壤团聚体氮分布及与氮素矿化关系研究[J].环境科学,2015,36(09):3411–3421.
[11]张凤华,梁静,庞玮.不同恢复模式对新疆弃耕地土壤理化性质和生物学特性的影响[J].水土保持学报,2013,27(05):169–172.
[12]梁丽,赵梅.施肥与植被覆盖对坡地铵态氮流失的影响[J].南方农业学报,2012,43(12):1986–1990.
[13]席颖,贾国梅,王旭,等.三峡库区不同植被覆盖对土壤氮的影响[J].湖北农业科学,2016,55(16):4113–4116.
[14]周媛媛,杜明新,周向睿,等.毛乌素沙漠南缘紫穗槐根际与非根际氮素含量特征[J].草业科学,2013,30(04):515–520.
[15]陈海滨,马秀丽,陈志彪,等.南方稀土矿区水土保持植物根际土壤碳氮及pH特征[J].土壤学报,2016,53(05):1334–1340.
[16]张兴昌,邵明安,付会芳.多年生黑麦草草地矿质氮淋溶与径流流失的关系[J].草地学报,2000,8(02):82–87.
[17]李菊梅,王朝辉,李生秀.有机质、全氮和可矿化氮在反映土壤供氮能力方面的意义[J].土壤学报,2003,40(02):232–238.
[18]陈怀满,等.环境土壤学[M].北京:科学出版社,2015:113–119.
[19]张亚丽,张兴昌,邵明安,等.降雨强度对黄土坡面矿质氮素流失的影响[J].农业工程学报,2004,20(3):55–58.