| Soil salinization make the available land area decreased, resulting in a decline in land productivity and ecosystem degradation, serious threat to national economic and social sustainable development. In order to ensure land productivity and the safety of the ecosystem, it is beneficial for ecological, economic and social development to control the trend of soil salinization, decrease soil salinization area and make full use of the high salinity groundwater resources. At present, high groundwater salinity magnetization treatment measures are advanced international alkali-saline land treatment technology. It has got a significant result in using this technology in Russia, Ukraine, United Arab Emirates, Egypt, Uzbekistan and other countries. High mineralization degree of groundwater magnetization treatment application greatly improve the efficiency of the salinization of soil, and improve the ability of plants stress tolerance, reduce the degree of damage of crops, promote the plant mineral nutrient absorption, significantly improve the quality of crop growth and yield.This experiment simulates the seawater composition and proportional allocation series of concentration gradient of irrigation water(0‰, 6‰, 8‰, 10‰). A continuous irrigating after magnetic treatment(U050/EXTRA1/2inch Grey) is designed for the one-year potting Fraxinus velutina. Torr. and Morus alba L. seedlings. Photosynthetic apparatus(GIRAS-2), Fluorimeter Plant Efficiency Analyzer(PEA) and Chlorophyll Fluorescence analysis(FMS-2) are used for gaining the different period of photosynthetic and fluorescence parameter from the magnetic water irrigating plant and non-magnetic water irrigating plant. Plant’s high diameter increment and biomass are measured at the end of the experiment. Root system characteristic is analyzed by root analysis system.From the point of the whole growth period, compared with the magnetized water irrigation, the flowing results were achieved:(1) Magnetic treatment improved the ability of salt resistance of two plants, reducing the damage level of the plants under stress. Influence of magnetic treatment on biomass of Fraxinus had great influence at all concentrations. Influence of magnetic treatment on Morus had great effect on low concentration, which had nearly 50% increases, but increased growth had little effect on saline irrigation water treatment.(2)Among them, the magnetization in the medium and late term effects significantly on fv/fm, in the late effects on ΦPSⅡsignificantly. Magnetic and salt concentrations have significant relationship with Ci, Tr, Pn, Gs on Fraxinus. Magnetic treatment significantly increased plant resistance to salt. Results showed that the magnetization photochemical efficiency overall than the control group.(3) Through the comparison of Morus and Fraxinus on Growth and Photosynthesis capacity, Salt injury may the most important factor threatening the growth of Fraxinus. And in the case of Morus, in addition to salt damage, other factors such as light, air temperature and humidity are also have great influence on its growth.(4)Non-magnetic treatment containing soluble proteins in leaves of mulberry trees were higher than that of magnetic treatment, which partly indicates that non-magnetic treatment had more severe salt stress injury. Non-magnetic treatment had more severe salt stress injury. The magnetization under three concentration gradients of chlorophyll content is higher than non-magnetized. By the determination of chlorophyll fluorescence and photosynthetic characteristics of Morus and Fraxinus, combined with analysis of biomass and enzyme activity, magnetized saline irrigation water can effectively reduced salt damage to plants, improved photosynthesis in mulberry, promoted their growth and improved plant resilience.(5) Magnetic and salinity treatment have a significant effect on Root Morphological Development, including diameter, length, root volume, surface area and other features. Magnetic treatment was significantly greater than that of control on Fraxinus. 10‰ salt content for diameter and length of root system have small amount of roots., since its rating to a lesser extent. With the increase of salt concentration on the whole, the low concentration of root growth is better than the high concentrations of growth. |
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