文献类型：期刊文献

中文题名：全福庄小流域不同土地利用类型地表水氮浓度动态特征

英文题名：Dynamic Characterization of Surface Water nitrogen Concentration Under Various Land Uses in Quanfuzhuang Watershed

作者：闵惠琳[1,2] 宋维峰[1]

第一作者：闵惠琳

机构：[1]西南林业大学生态与水土保持学院;[2]中国林业科学研究院热带林业实验中心

年份：2019

卷号：26

期号：1

起止页码：92-97

中文期刊名：水土保持研究

外文期刊名：Research of Soil and Water Conservation

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：国家自然科学基金"基于氢氧同位素技术的元阳梯田水源区土壤水分运移规律研究"(41371066)

语种：中文

中文关键词：元阳梯田;四素同构;氮浓度;动态变化

外文关键词：Yuanyang terraces;Four-element-in-a-structure;nitrogen concentration;dynamic variation

分类号：X832;X523

摘要：为定量研究元阳梯田"四素同构"生态系统不同土地利用类型地表水氮浓度的动态变化特征,以元阳县全福庄小流域为研究对象,于2016年11月—2017年10月,连续定位观测林地、村庄、梯田、河流4种土地利用类型地表水中总氮(TN)、硝态氮(NO-3-N)和氨态氮(NH+4-N)浓度的动态变化,分析了各形态氮浓度的时空分布及其季节性变化。结果表明:(1)4种土地利用类型下TN和NO-3-N浓度的最大值均出现在6月,最小值均出现在12月—翌年2月,梯田和河流的NH+4-N浓度较高,且最大值均出现在5月,梯田中NH+4-N浓度的最小值出现在7月。(2)TN,NO-3-N和NH+4-N浓度均表现出村庄最高,其次为梯田和河流,最低为林地的分布特征。林地、梯田和河流中TN和NO-3-N浓度均为夏季>春季>秋季>冬季的变化规律,林地、梯田和河流中NH+4-N浓度呈现为春季>冬季>秋季>夏季的变化规律。
The dynamic characteristics of surface water nitrogen concentration under various land uses were studied in the Quanfuzhuang watershed with typical nature of‘four-element-in-a-structure’ecosystem in Yuanyang County.From November 2016 to October 2017,the study was conducted to analyze spatial and temporal distribution as well as seasonal variations of the nitrogen concentration through monitoring the TN,NO^-3-N and NH^+4-N of the surface water under four land uses of forest,villages,terraces and river.The results showed that:(1)the highest concentrations of TN and NO-3-N appeared in June,while the lowest in December to February;the concentrations of NH+4-N in terraces and river were higher and the highest in May,while the lowest NH^+4-N in the terraces appeared in July;(2)the highest concentrations of the TN,NO^-3-N and NH^+4-N appeared in the village,followed by terraces and river,and the lowest appeared in the forestland;concentrations of TN and NO-3-N in the forest,terraces and river decreased in the order:summer >spring >autumn,while the NH+4-N concentrations decreased in the sequence:spring >winter >autumn >summer.