| HE Xiuping,WANG Baodong,XIE Linping,XIN Ming,WANG Wei,WANG Zicheng,ZHANG Wenquan,WEI Qinsheng. 2016. Effects of Tamarisk shrub on physicochemical properties of soil in coastal wetland of the Bohai Sea. Acta Oceanologica Sinica, 35(5):106－112 |
| Effects of Tamarisk shrub on physicochemical properties of soil in coastal wetland of the Bohai Sea |
| 柽柳对渤海滨海湿地土壤理化参数的影响 |
| Received:April 24, 2015 Revised:January 06, 2016 |
| DOI：10.1007/s13131-016-0851-8 |
| Key words:coastal wetland Tamarisk soil physicochemical parameter |
| 中文关键词: 滨海湿地 柽柳 土壤 理化参数 |
| 基金项目:The Public Science and Technology Research Funds Projects of Ocean under contract No. 201205008. |
| Author Name | Affiliation | E-mail | | HE Xiuping | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | WANG Baodong | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | wangbd@fio.org.cn | | XIE Linping | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | XIN Ming | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | WANG Wei | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | WANG Zicheng | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | ZHANG Wenquan | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | WEI Qinsheng | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | |
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| Abstract: |
| 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, pH 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 pH value is as low as 7.3 in summer and as high as 10.2 in winter. The pH of soil near the taproot of the Tamarisk shrubs is one pH unit lower than that in the control area during the growing season. The difference in pH 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. |
| 中文摘要: |
| 目前针对柽柳对土壤理化性质有很多不同甚至相反的结论,为了探知柽柳对滨海湿地土壤理化参数的影响,我们针对渤海滨海湿地柽柳冠下土壤理化参数如盐度,pH和水分进行了为期一年的监测。与对照区域相比,在柽柳生长季节当降水量较少时,由于柽柳对水分的消耗,在其主根附近形成土壤水分含量低值区;然而,在柽柳生长期或柽柳生长停滞期,当降水量丰富时,由于柽柳根际的保水作用,在柽柳主根附近形成水分含量高值区。柽柳根际的吸收作用会暂时降低土壤盐分含量但最终会通过雨水对枝叶盐分的淋洗以及落叶将盐分返回土壤。柽柳冠下土壤水分年平均值较对照区仅低6.4%,这表明在温带滨海湿地年平均降雨适中的地区,柽柳对土壤干旱和保水作用并没有很大的影响。然而,柽柳冠下土壤年平均盐分较对照区高18%,表明柽柳确实具有增加其冠下土壤盐分含量的作用。此外,土壤pH值在夏季会低至7.3而在冬季高至10.2。在柽柳生长季节,柽柳主根附近的pH比对照区低1个多pH单位但是在生长停滞期却差别不大,表明柽柳确实能够降低滨海湿地土壤pH。 |
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