Study On The Effect Of Reclaimed Water Irrigation On Typical Leaf Vegetables

At present,more and more regions use reclaimed water as alternative irrigation water,but reclaimed water irrigation also has its risks,so it is necessary to study the effects of reclaimed water irrigation on Soil and plants.In this paper,the effects of reclaimed water irrigation on nitrogen,phosphorus and potassium contents and physiological characteristics of pakchoi,chicken cabbage and spinach leaves were studied by consulting a large number of domestic and foreign literatures and combining with the current irrigation situation in this area.The effects of reclaimed water irrigation on soil available nitrogen,phosphorus and potassium contents were studied.The following conclusions were drawn:(1)Reclaimed water irrigation significantly increased the content of available nitrogen and potassium in the root layer of Pakchoi plot soil,but did not significantly increase the content of available phosphorus in Pakchoi Plot Soil at seedling stage,significantly increased the content of available phosphorus in other three periods,and significantly increased the content of available nitrogen,available phosphorus and available potassium in Pakchoi Plot Soil at seedling stage;reclaimed water irrigation significantly increased the content of available nitrogen,available phosphorus and available potassium in spinach plot soil.The content of available nitrogen and available potassium in soil significantly increased the content of available phosphorus in the seedling stage,the second growth stage and the mature stage of spinach field.(2)There was no significant difference in nitrogen,phosphorus and potassium contents in leaves of three kinds of leafy vegetables under two kinds of water irrigation.(3)Regenerated water irrigation significantly increased the chlorophyll content of Pakchoi leaves at seedling stage,but had no significant effect on other stages;for chicken cabbage,the effect was not significant;for spinach,regenerated water irrigation significantly increased the chlorophyll content in the first three development stages,but had no significant effect at maturity stage.(4)Reclaimed water irrigation significantly improved the resistance of Pakchoi leaves at seedling stage,first growth stage and maturity stage,but not at second growth stage;it had no significant effect on the resistance of chicken cabbage;Reclaimed water irrigation significantly improved the resistance of spinach leaves at seedling stage,first growth stage and maturity stage,but had no significant effect atsecond growth stage.(5)Reclaimed water irrigation significantly increased the root activity in the first and second growth stages of Chinese cabbage,but had no significant effect on the seedling and mature stages of Chinese cabbage;had no significant effect on the root activity of Chicken cabbage;significantly increased the root activity of spinach throughout the cultivation period.(6)In conclusion,in this experiment,reclaimed water irrigation will not have adverse effects on Soil and plants,but will have beneficial effects on soil nutrients,chlorophyll content,stress resistance and root activity of plants.