Study of the comprehensive landscaping treatment technique of saline-alkali land in Daqing based on the network of the grading of trapezoidal terrace ditches

摘要

Salinization of the soil in Daqing in China is the main result of its geographical structure and climate condition. Oil exploration and overgrazing anthropogenic factors lead to the concentrated distribution in the form of plague, which threatens the inhabitation comfort and sustainable land use of the city environment as the oil operation and grazing zone expand. The treatment and subsequent development of saline/alkali land in Daqing are extremely crucial to curtail environmental desertification and promote the development of industries during the urbanization. This study compares the traditional physical, chemical, and biological technologies for the improvement of salinization land to establish the combined method of technology optimization. Considering the water conservancy as the guidance, the aim is to present the stable long- and short-term combined technological method of biological improvement from the view of eco-restoration and industrial renovation, supported by the physical and chemical improvement. The technology of network of the grading of trapezoidal terrace ditches, which combines the trapezoidal terrace with landscape using natural sedimentation, is proposed. The indoor terrace elution experiment indicates that the salinity reduced by 52%, alkalinity 50, and 50% for oily substances during 48 h; this technology is combined with comprehensive utilization of the waste, collaborative repair of the microorganisms and plants to offer new views and theoretical support for the protection and development of the saline/alkali land in Daqing area.