Effects Of Zinc On The Yield And Quality Of Water Spinach

Water spinach(Iromoea aquatic forsk), commonly known as the dish, hollow vegetable and bamboo food. In recent years water spinach in north China in planting area has increased year by year, to alleviate the supply plays a certain role of off-season vegetable market.In this experiment, the Northeast cultivars Thai water spinach as the object of study, experiments carried out in alkaline (PH7.6) north of zinc deficiency soil.This study explores the test the experimental results was A base-zn fertilizer (15kg/hm2), B base-zn fertilizer (7.5kg/hm2)+topdressing zinc fertilizer (7.5kg/hm2), C foliar spraying zinc fertilizer (15kg/hm2), D base-zn fertilizer (15kg/hm2) and foliar spraying zinc fertilizer (15kg/hm2), CK’s influence to the growth of water spinach. The results show that the concentration of base-zn fertilizer (15kg/hm2) and foliar spraying zinc fertilizer (15kg/hm2) of the zinc fertilizer can promote the growth and development of the Iromoea aquatic forsk, has the remarkable increase effect; In a certain apply zinc range, blade zinc content increased,and the fastest increase zinc of leaf. And reasonable-zn is not contaminated soil, and the environment. This experiment purposes, discussed in foliar spraying zinc fat for improving influence of the quantity and containing zinc production of the hollow vegetable, to adapt to the growth of the Iromoea aquatic forsk apply-zn in many ways, find the most suitable for water spinach growth, most can improve the quality of iromoea aquatic forsk nourishment-zn way. Test results are as follows:1Appropriate zinc concentration promote water spinach seed germination and the growth of root budWater spinach seeds of zinc leaching process, can promote water spinach germination process. When zinc concentration in0.05%, water spinach seed ahead of the thief24hours, roots and buds longer, when zinc concentration in0.1%of the time, water spinach seed sprout potential and germination index, potential decline. When zinc concentration in0.02%～0.05%, the root, the bud length increase obviously, when zinc concentration in0.05%to0.1%, the growth of the root and the bud is not clear.2Increase apply-zn fertilizer, promote the growth of the water spinachThis subject is the results of the study show that right amount, the performance of the water spinach reduce plant height, stem diameter increase. Strong growth, blade greener. Water spinach is short of zinc can’t normal growth, slow growth. That increase the zn fertilizer promoting the growth and development of water spinach.3The zn-fertilizer to water spinach what can improve some of the biological activities. Use appropriate zinc fertilizer is helpful to improve the iromoea aquatic forsk’s chlorophyll in the leaf, SOD, POD and CAT activity, reduce the MDA, nitrate content. Plant the chlorophyll content and carbon anhydride enzyme (CA) and the ratio of the enzyme activity, strengthen the ability of photosynthesis, zinc-deficiency, chlorophyll synthesis is restrained, chloroplast structure damage in cells, CO2concentration, stomata conductance decreased, CA and the ratio of the enzyme activity is reduced, and cause CO2assimilation fixed ability is reduced.4Zn fertilizer obviously improve the production of water spinach.Zinc through the influence of the key enzyme to promote the vegetables chlorophyll, photosynthetic rate, dark reaction, cause the change of photosynthesis. Research has shown that excessive use of zinc or zinc deficiency, on chlorophyll’s synthetic adverse, reduce the photosynthetic strength and light energy utilization rate. This experiment used A base-zn fertilizer (15kg/hm2), B base-zn fertilizer (7.5kg/hm2)+topdressing zinc fat (7.5kg/hm2), C foliar spraying zinc fat (15kg/hm2), D and zinc was fat (15kg/hm2) and foliar spraying zinc fat (15kg/hm2), CK (zero zinc, soil zinc content is0.46mg/Kg) several processing, along with the increase of the zinc fertilizer, individualplant fresh weight of water spinach than contrast (CK) have improved. Among them was the processing D base-zinc fertilizer (15kg/hm2) and foliar spraying zinc fertilizer (1.5kg/hm2) to individualplant fresh weight of iromoea aquatic forsk has obvious effect. The test data show that obviously water spinach-zn fertilizer can promote their production.5Zn fertilizer can improve the quality of iwater spinachThe results of the study show that, increase zn fertilizer can increase the amount of containing zinc to iwater spinach, improve the water spinach Vc, soluble sugar, soluble protein content and improve the nutrition quality of water spinach.