| With the improvement of living standard,people demand more and more vegetable quality.Therefore,it is the primary purpose of greenhouse cultivation to improve tomato yield and quality.There are many studies on increasing chemical fertilizer in facilities in order to achieve the purpose of increasing production,but excessive application of some chemical fertilizer can lead to soil salinization and serious consolidation.And the facility transmittance is poor,the temperature of greenhouse is low in winter,and the effect of warming and heat preservation is poor.Under the closed cycle soilless cultivation system,the tomato varieties suitable for protected cultivation were selected,and the effects of potassium application and zinc fertilizer on the yield and quality of tomato were verified.On this basis,the effects of different light supplementation intensity on the physiology and quality of tomato were studied.Finally,the greenhouse was heated with solar energy storage system,and the fruit yield and quality were improved on the basis of improving solar energy utilization efficiency.The main contents and conclusions are as follows:1."Pink Polaroid"matured early,and its fruit flavor and nutritional quality were better than those of other varieties.The yield per plant and fruit weight per plant were the highest,but because of its fine stem and low fruit hardness,it was suitable for greenhouse planting.2.Adding potassium and zinc fertilizer had significant effects on tomato quality and yield?P<0.05?.In this experiment,?1?the application of zinc and potassium fertilizer increased the plant height,stem diameter,photosynthetic characteristics,yield and quality of tomato.?2?the effect of increasing zinc fertilizer on tomato was lower than that of potassium fertilizer.?3?the effect of potassium and zinc supplementation was better than that of single element.The results showed that potassium and zinc had a good synergistic effect on plant growth.3.Effects of zinc fertilizer on growth,photosynthetic characteristics,quality and yield of tomato under different light supplementation intensity and different concentration of potassium.The results showed that when the light intensity was 380?mol·m-2·s-1,the concentration of potassium ion was 16 mmol/L,and the concentration of zinc ion was 1.155?mol/L,the comprehensive quality of tomato fruit was the best and the yield was the highest.4.The greenhouse was heated by active solar energy storage system,and the difference of air temperature and substrate temperature between greenhouse and contrast greenhouse was compared.The feasibility of solar energy storage system was reflected by tomato growth status,yield and quality.The results showed that when the greenhouse was heated by solar energy phase change heat storage system,the fruit matured earlier and the yield was significantly higher than that in the control greenhouse.In summary:Under the suitable light intensity,potassium and zinc supplementation could significantly improve the quality and yield of"Pink Polaroid"tomato varieties,and the active solar energy storage system could increase the reproductive growth of tomato by heating the rhizosphere of tomato.Therefore,in the future development of protected horticulture,"Pink Polaroid"can be used as the best cultivar for protected cultivation,and it is suitable for both light and potassium and zinc supplementation to maximize the quality and yield of tomato.The local heating of solar energy storage system can save energy and increase the yield,which provides a theoretical basis for the efficient cultivation of tomato in the future. |
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