摘要
为探明不同水位梯度对湿地土壤性质的影响,对杭州湾围垦芦苇湿地不同水位条件下土壤有机碳(SOC)、全氮(TN)、全磷(TP)含量和化学计量比及其相关性进行研究。结果表明:(1)SOC和TN含量随着水位增加总体上均表现为先下降后升高趋势,而TP含量沿水位梯度变化趋势不显著;(2)土壤未被水淹时(0 cm水位)土壤C/P比、N/P比和C/N比均随土壤深度的增加而降低,而水淹后(10、20、30 cm水位)土壤C/P比、N/P比和C/N比则呈现先降低后增加趋势;(3)不同水位梯度SOC含量与N/P比、TN含量与C/P比均呈显著正相关(P<0.05),而土壤TP含量与C/N比呈负相关,但相关性不显著(P>0.05);(4)土壤pH值是影响杭州湾湿地0 cm水位梯度下SOC、TN和TP含量变化的重要因子,但随着水位的增加土壤pH值与SOC、TN和TP含量的相关性逐渐减小。随着水位的增加,土壤深层SOC和TN累积量逐渐增加,而土壤TP含量随水位增加趋势不明显;土壤pH值对SOC、TN和TP含量的影响随着水位的增加而逐渐减弱。
Water level in wetland may affect soil properties of the wetland. Effects of water level on soil properties of reed wetlands in Hangzhou Bay Polder were studied. The vertical distribution patterns of the soil organic carbon ( SOC) , total nitrogen (TN) and total phosphorus (TP) along the soil profile and their stoichiometric ratios relative to water level were investigated. Results show that:(1) on the whole, SOC and TN contents decreased at first then increased with rising water level, while the content of TP did not change much (P<0?05);(2)when the soil remained unsubmerged (Water level 0) C/P, N/P and C/N declined with soil depth, but when the soil was submerged, regardless of water levels, their initial de?creases were followed by increases;(3) SOC was positively correlated with soil N/P and TN with soil C/P, while TP was negatively, but not so significantly with soil C/N at all water levels;and ( 4) soil pH was the major factor affecting SOC, TN and TP at 0 cm water level, but the effect faded with rising water level. SOC and TN accumulations in the deep soil layers increased with rising water level, while TP did not change much ( P<0?05) .
出处
《生态与农村环境学报》
CAS
CSCD
北大核心
2015年第5期718-723,共6页
Journal of Ecology and Rural Environment
基金
国家科技支撑计划(2012BAC13B02)
中国林科院基本科研业务费专项(CAFYBB2014MA002)
国家林业公益性行业科研专项(201404210
201404305)
关键词
杭州湾湿地
水位梯度
有机碳
全氮
全磷
pH值
Hangzhou Bay wetland
water level gradient
organic carbon
total nitrogen
total phosphorus
pH
