高矿化度灌溉水磁化处理对绒毛白蜡生理特性及生长的影响

doi:10.11707/j.1001-7488.20160215

Abstract

Abstract: [Objective] High groundwater salinity magnetization treatment measures are advanced international alkali-saline land treatment technology. The investigation on the magnetic treatment influence of photosynthesis and physiological characteristics of Fraxinus velutina further showed the mechanism of how to promote F. velutina's growth under magnetic treatment. The study also provides reference and a basis in agricultural for the application of magnetic technology, forestry production, soil improvement and vegetation repair.[Method] In this study, we imitated the seawater composition and proportional allocation series of concentration gradients used as the irrigation water (0, 6, 10 mg·L^-1). After magnetic treatment the water was used to continuously irrigate the potting one-year-old Fraxinus velutina. seedlings. Photosynthesis, chlorophyll fluorescence and the seedling growth were used as the parameters to test effects of the magnetic water on the seedlings. The height increment and biomass were measured at the end of the experiment. Root system characteristic was analyzed by a root analysis system.[Result] 1) There were significant differences in photosynthetic parameters (P_n, Tr, G_s, C_i, P_n/Tr, F_v/F_m, ΦPSⅡ) between magnetic and non-magnetic water irrigation. The magnetic water irrigated seedlings had stronger photosynthetic capacity. The non-magnetic water irrigated seedlings suffered greater harm. 2) The higher salt concentration, the lower biomass F. velutina obtained. The magnetic water irrigation promoted the biomass's accumulation to a certain degree. 3) Based on the results, the possible mechanism of the improvement of photosynthetic capacity is proposed. That is, more free water molecules would be produced after the magnetic treatment. The water molecules enter the plant cells, forming more hydrogen bonds with chlorophyll a, which would increase conversion rate of plant chlorophyll a. Thus, the photosynthesis would be increased, the resistance be enhanced and the growth be promoted.[Conclusion] The magnetic treatment improved the photosynthetic capacity and biomass of F. velutina, therefore reduced the level of salt damage to plants.

Key words: soil salinization, magnetization treatment, Fraxinus velutina, photosynthesis, chlorophyll fluorescence.

CLC Number:

S718.43

Wan Xiao, Liu Xiumei, Wang Huatian, Wang Lu, Wang Ying, Zhong Fengwei. Effect of Magnetic Treatment of Salty Irrigation Water on Physiological and Growth Characteristics of Potted Fraxinus velutina Seedlings[J]. Scientia Silvae Sinicae, 2016, 52(2): 120-126.

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Effect of Magnetic Treatment of Salty Irrigation Water on Physiological and Growth Characteristics of Potted Fraxinus velutina Seedlings

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