| Soilless cultivation has the advantages of precise control of water and fertilizer,rapid crop growth,high yield,high quality,and absence of continuous cropping obstacles.Long-term soilless which can make full use of greenhouse space,light and heat resources has achieved very good economic effect on greenhouse fruit and vegetables useculture in developed countries.Because of the limitation of the control measures in solar greenhouse environment,long-term soilless culture will easily lead to the problems such as aging roots,unbalanced nutrition,serious diseases and insect pests in China.It is great significante to research the impact on crop growth with multi-layered three-dimensional cultivation,because it not only can make full use of solar greenhouse space,light and heat resources,but also has problems such as unequal light temperature distribution between layers,affecting crop growth,yield,maturity,etc.Although it is one of the ways to increase greenhouse efficiency.This experiment studied the effects of different types of luster and light on the three-dimensional cultivation and yield of pepper,by observing the light and temperature conditions of the two types of models,the growth,nutrients and yield of pepper planted by the "H" and "A" type of two cultivation shelves with nutrition liquid film cultivation.The results showed that:1.Compared with the H type,the LCP(light compensation points)of the type A culture shelf in the middle and lower layers of the east-west side increased by 83.3%,125.00%,27.27%,and30.00% respectively in cloudy day,and increased by 18.50%,7.41%,14.28%,and 0.00%respectively in lighting conditions,after the autumn peppers colonized 40 days.So A-frame are better than H-frames.2.Compared to H-type cultivation frame,the maximum temperature of the upper and lower layers of the upper and lower layers of the A-type culture shelf was 1.9°C,1.5°C,0.8°C,and1.6°C higher respectively in sunny days,and the leaf temperature's difference of the peppers in the different positions with the A-shaped cultivation shelf was less than 0.5°C in the cloudy days.Besides,there was no difference for their leaf temperature of the pepper in each layer in cloudy days.So the A-type three-dimensional cultivation shelf can increase the temperature of the middle and lower layer pepper leaf curtain,and the temperature difference between the layer temperature is relatively small.3.During the growth period of pepper,the plant height,stem diameter,number of leaves,leafchlorophyll content,dry and fresh weight of above ground and underground area of the pepper plant and other indicators of the three-dimensional cultivation frame of A-type pepper were higher than that of the corresponding position in H-type shelf.4.The contents of soluble sugar,vitamin C and soluble solids in the upper,middle and lower layers of the east and west sides of pepper planted with the A-type chili three-dimensional cultivation frame were all significantly higher than those of the H-shaped cultivation frame.5.Compared with the H-shaped cultivation shelf,the yield and the benefit of A-shaped cultivation shelf respectively increased 26%,10,544 yuan/667m2,and the investment in the cultivation shelf facilities of A-shaped cultivation shelf decreased 1300 yuan/667m2.In summary,the A-shaped cultivation frame has obvious advantages in terms of light temperature,pepper plant growth,yield and fruit quality of pepper,cost efficiency et al.,so it has the advantage to be promoted. |
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