| Effects of magnetized water on growth, photosynthesis and nutrient uptake of cucumber seedlings under different soil moisture contents |
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| DOI：10.7606/j.issn.1000-7601.2020.05.14 |
| Key Words: cucumber seedlings magnetized water irrigation drought growth photosynthesis water status nutrient uptake |
| Author Name | Affiliation | | CAI Minglei | College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China | | LI Yangyang | State Key Laboratory of Soil Erosion and Dryland Farming, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China | | FAN Jun | State Key Laboratory of Soil Erosion and Dryland Farming, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| A two\|factor and two\|level complete experimental design was adopted to study the effect of magnetization treatment (magnetized distilled water with 0.3T magnetic field intensity and distilled water) on the growth, water relation, photosynthesis, and nutrient uptake of cucumber seedlings under different soil moisture contents (normal water treatment: soil moisture at 80%~85% of field water holding capacity; drought treatment: soil moisture at 40%~45% of field water capacity, and maintained at this level for 7 days at the 4~5 leaf stage of cucumber) under sand culture condition. The results showed that magnetized water application significantly decreased stem diameter, aboveground biomass, root biomass, total biomass, root volume, and root surface area of cucumber seedlings by 6.7%, 8.9%, 19.1%, 9.9%, 22.1%, and 18.5%, respectively, and whole\|plant water consumption and water use efficiency of cucumber seedlings by 6.2% and 10.9%, respectively. Magnetized water treatment reduced leaf SPAD value of cucumber seedling by 3.7%, increased leaf stomatal conductance and transpiration rate by 21.8% and 17.5%, respectively, and decreased instantaneous water use efficiency of the leaves by 17.7%, but had little effect on the net photosynthetic rate. Magnetized water treatment resulted in 5.2% reduction in the maximum photochemical efficiency and 18.6% decrease in PSII electron transfer rate. Magnetized water treatment increased the K content in the leaves. Although magnetized water treatment significantly increased the K content in the leaves of cucumber seedlings under drought stress, but had little effect on most plant growth and physiological parameters. The results suggested that the application of magnetized water on cucumber seedlings was dependent on soil moisture conditions. |
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