Improvement Of Tamarix Chinensis To Severe Saline Land In The North Of Shanxi Province And Response Of Saline-alkali Stress

This experiment is used to find two things which are the effects of salinity stress on salt-tolerant plants and the improvement effects of plants on saline soil. The experiment base on the national welfare scientific research project "research on integration technology of severe saline-alkali soil vegetation restoration in the north of Shanxi province". In addition, Tamarix chinensis which is a salt-tolerant plant is selected as the main object, and Jinshatan forestry centre of Ying County, Shuozhou City,Shanxi Province is cooperated to build the experimental environment. The soil 1 meter below the plants was sampled separately by 5 layers on the each 25th during March to September in 2014 and 2015, which is exactly one growth cycle. There are certain values been tested. They are moisture content, power of hydrogen(PH), conductivity(EC); SOD, POD, MDA, chlorophyll content in the roots, stems and leaves, and the laws of changes over time. The experiment picks up the field sample, analysis in laboratory and late data statistics three methods, and focused research the effect of Tamarix chinensis on the north of Shanxi Province's salinity stress and the improvement effect of Tamarix chinensis on saline soil. Finally, some consequences were found:1.Planting Tamarix chinensis causes that moisture content of saline soil increase by 45.41%, PH decrease by 7.82% and EC is reduced by 16.82%. This improves soil's Physical and Chemical Properties.2.Planting Tamarix chinensis causes that the distributions of Cu, Zn, Fe, Mg are balanced. They rise from 5.02,8.57,1.83 mg/kg to 26.03,13.75,2.28 mg/kg, which are 418.53%,52.98%,27.87% also.3.The change of POD, SOD is similar. Their growth relates on the time. The amounts in the roots more than stems, and stems more than leaves. Differently,the amount of MDA rises firstly and then goes down. Leaves, stems and roots are listed from high MDA to low. The change of chlorophyll repeats from increasing to decreasing over time.4. A negative correlation was found between Cu and Mg. Cu with Fe, Zn with Mg and Zn with Fe have positive correlation. pH and Cu have positive correlation. pH and Zn have negative correlation. Cu and EC have negative correlation.Mg and Zn have positive correlation with EC. Cu and Fe have positive correlation with moisture content. Mg and Zn have negative correlation with moisture content. pH and moisture content have negative correlation with EC. pH and moisture content have positive correlation. POD,EC,Mg and Zn have positive correlation with SOD. SOD and moisture content have negative correlation. A positive correlation was found between MDA and EC,and a negative correlation between MDA and Cu.