Study On Water Spinach Nutrition Optimum Proportion And Quality Cont

Plant factory is with modern agricultural facilities and high-tech cultivation techniques relying on efficient agricultural production, with land output rate is high, high productivity and economic benefits of the advantages, to achieve a balanced anniversary production of vegetables and other agricultural products has become an important means of modern agricultural development. Nutrient solution culture is the dominant cultivation technology in plant plant, nutrient solution nutrient ratio and concentration determine the yield and quality of vegetables. At present, there is less formula for the adaptive nutrient solution of spinach. The research carried out different nutrient solution formulation, concentration of hydroponic spinach growth, yield, quality, water use efficiency and nutrient demand and utilization efficiency. The main results are as follows:(1) compared to 0.8 times Hogland, Japan Yamazaki, Japanese Garden test and Southern China Nongda A affecting 4 leafy vegetables commonly used leafy hydroponic nutrient solution on the dynamics of biomass, quality of spinach, found 0.8 times Hogland formula on fresh weight, root fresh weight Huanong A minimum; Yamazaki formula, Huanong A minimum; the nitrate content of spinach garden test formula is low, soluble sugar and VC content were the highest, the biomass is large, the best formula of hydroponic spinach; nutrient solution pH increased gradually during a modulation period; the conductivity in the whole growth cycle generally showed first decreased and then increased trend; the growth of spinach nutrition the period of strong elements in nutrient solution showed a sharp downward trend, the maximum water requirement; nutrient use efficiency is the highest Yamazaki formula.(2) spinach seedling roots of garden test is extremely sensitive to nutrient solution concentration, the higher concentration will lead to injury and even death in the roots, seedling optimum growth concentration of nutrient solution for 1 / 4 times; during the whole growth period of 1 / 2 times the concentration Park test formula yield was significantly higher than that of other treatments, 1 / 8 times the concentration processing nitrate significantly lowest, 1 times, 3 / 4 times the VC content is higher; water use efficiency the highest processing is 1 / 2 times the concentration, under the low concentration treatment element utilization efficiency is generally higher; principal component analysis comprehensive evaluation, consider the yield and quality of obtained 1 / 2 as long as park test formula of nutrient solution as the optimal concentration ratio.(3) the park test formula spinach three growth stages four concentration gradient of three factor and four level orthogonal test analysis found that the three most appropriate growth of spinach nutrition liquid concentration followed by: 0.50 times, 1.25 times, 50 times; at different growth stages of nutrient solution concentration on spinach production influences from big to small is as follows: the third stage, the second stage, the first stage; treatment 9(three phase concentration followed by 0.5, 1.25, 0.5) comprehensive evaluation index is best, No. 3 treatment(three phase concentration followed by 1, 0.75, 0.5) comprehensive evaluation index is the worst.