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Effects of Tamarisk shrub on physicochemical properties of soil in coastal wetland of the Bohai Sea

查看全文 作　　者：HE [1]Xiuping;WANG [1]Baodong;XIE [1]Linping;XIN [1]Ming;WANG [1]Wei;WANG [1]Zicheng;ZHANG [1]Wenquan;WEI [1]Qinsheng 高影响力作者 机构地区：[1]First Institute of Oceanography,State Oceanic Administration高影响力机构 出　　处：《Acta Oceanologica Sinica》索引2016年第35卷第5期,共7页高影响力期刊 基　　金：The Public Science and Technology Research Funds Projects of Ocean under contract No.201205008 摘　　要：There are many different and even controversial results concerning the effects of Tamarisk on the physicochemical properties of soil. A year-round monitoring of soil salinity, p H and moisture is conducted beneath the Tamarisk shrub in a coastal wetland in the Bohai Sea in China, to ascertain the effects of Tamarisk on the physicochemical properties of soil in coastal wetland. Compared with the control area, the soil moisture content is lower around the area of the taproot when there is less precipitation in the growing season because of water consumption by Tamarisk shrub. However, the soil moisture content is higher around the taproot when there is more precipitation in the growing season or in the non-growing period because of water conservation by the rhizosphere. The absorption of salt by the Tamarisk shrub reduces the soil salinity temporarily, but eventually salt returns to the soil by the leaching of salt on leaves by rainfall or by fallen leaves. The annual average soil moisture content beneath the Tamarisk shrub is lower than the control area by only 6.4%, indicating that the Tamarisk shrub has little effect on drought or water conservation in soils in the temperate coastal wetland with moderate annual precipitation. The annual average salinity beneath the Tamarisk shrub is 18% greater than that of the control area, indicating that Tamarisk does have an effect of rising soil salinity around Tamarisk shrubs. The soil p H value is as low as 7.3 in summer and as high as 10.2 in winter. The p H of soil near the taproot of the Tamarisk shrubs is one p H unit lower than that in the control area during the growing season. The difference in p H is less different from the control area in the non-growing season, indicating that the Tamarisk shrub does have the effect of reducing the alkalinity of soil in coastal wetland. 关 键 词：土壤理化性质 滨海湿地 渤海海域 柽柳 土壤水分含量 土壤盐度 生长季节 沿海湿地
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