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Research on the Effects of the Irrigation by Papermaking Wastewater on Desert Ecological Forest

Author: HouPeiQiang
Tutor: TaoLing
School: Lanzhou Jiaotong University
Course: Hydrology and Water Resources
Keywords: Pulp and Paper Effluent Desert ecological forest Desert soils Groundwater
CLC: S725
Type: Master's thesis
Year: 2008
Downloads: 103
Quote: 0
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Abstract

In this paper, papermaking wastewater irrigated desert ecological forest for the study, the the papermaking wastewater irrigation Desert ecological forest of desert plants, desert soil, groundwater and desert ecological forest. By research on the papermaking wastewater irrigation at different ages and different growth parts of the desert plants sodium ion content, the results are displayed: the tamarisk, angustifolia, Populus same growth as part of sodium ion content increases with the increase of years of irrigation and with sodium ion content in the soil was a significant positive correlation; tamarisk leaves sodium ion content was significantly higher than the sodium ion content in the roots, SALINE STRESS tamarisk leaves together the salt is greater than the root poly salt, red willow sodium ion accumulation and outside The main part of the row; Elaeagnus leaves sodium ion content was significantly higher than the sodium ion content in the roots, salinity stress the Elaeagnus leaves poly salt is greater than the root poly-salt Elaeagnus leaf is the main part of the sodium ion accumulation; poplar roots sodium ion content was significantly higher than the sodium ion content in the leaves, the root has a strong absorption of sodium ions, sodium ions accumulated. To study the different irrigation periods and different soil depth, soil physical, chemical and nutritional ingredients, results showed that: desert soil in the papermaking wastewater irrigation conditions, the same soil depth, soil bulk density with the increase of years of irrigation decreased; same soil The depth of soil porosity gradually increased with the increase of years of irrigation; (0) in the control area, soil bulk density gradually increased with increasing soil depth, soil porosity decreased with increasing soil depth. The same soil depth, soil organic matter, total nitrogen, total phosphorus and other nutrients are gradually increased with the increase of years of irrigation; the same irrigation years of soil organic matter, total nitrogen, total phosphorus and other nutrients are gradually decreased with increasing soil depth . The same soil depth, soil sodium ion content and soil total salt content gradually increased with the increase of years of irrigation; same irrigation years of soil sodium ion content and total salt content increased with soil depth increases. The same soil depth, the soil pH decreases gradually with the increase of years of irrigation; same years of irrigation, the soil pH decreased with soil depth increases; microbial quantities significantly increased with the increase of years of irrigation. The desert ecological forest of Groundwater samples were analyzed, the results show that the individual indicators are in line with the groundwater quality standards for Class III, we can see the sewage irrigation and groundwater pollution. The results for the the papermaking wastewater resource utilization to provide theoretical guidance and practical basis.

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