Effects of Tamarisk shrub on physicochemical properties of soil in coastal wetland of the Bohai Sea
- PDF / 523,930 Bytes
- 7 Pages / 595 x 842 pts (A4) Page_size
- 87 Downloads / 178 Views
Effects of Tamarisk shrub on physicochemical properties of soil in coastal wetland of the Bohai Sea HE Xiuping1, WANG Baodong1*, XIE Linping1, XIN Ming1, WANG Wei1, WANG Zicheng1, ZHANG Wenquan1, WEI Qinsheng1 1 First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Received 24 April 2015; accepted 6 January 2016 ©The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg 2016
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. Key words: coastal wetland, Tamarisk, soil, physicochemical parameter Citation: 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, doi: 10.1007/s13131-016-0851-8
1 Introduction Tamarisk chinensis Lour. (Tamarisk), a native Eurasian plant, is a dicotyledonous shrub or small tree that exhibits salt secretion (Grubb et al., 1997). Tamarisk can be used as a source of browse, lumber, fuel, Chinese medicine, and paper pulpwood (Bateman and Paxton, 2009). Tamarisk also has some environmental values, such as regulating climate, conserving water and soil, breaking wind and stabilizing sa
Data Loading...
