Light Compensation Measures Of Myrica Rubra In Facilities Cultivation

In order to solve the problem of more rain in other periods such as the rainy season,in recent years,the cultivation of Myrica rubra in the greenhouse has become a demand trend of production,but in the development of Myrica rubra fruit,there is continuous cloudy or heavy rainfall,and the light is weak.It can't meet the demand for photosynthetic products in the vigorous growth period of Myrica rubra fruit,which will affect the photosynthesis and fruit development of Myrica rubra to a large extent,and thus affect the flavor,quality and yield of the fruit.In this thesis,it is proposed to design LED lamps and fluorescent lamps with different light-quality ratios,and to make the light-filling test of the plants under the light intensity of 480 lx and 600 lx,and to measure the physiological indexes of the plants during the various growth stages of the Myrica rubra fruit during the experiment.Fruit quality parameters,etc.,to analyze the effect of fill light with different light quality ratios on the fill light of Myrica rubra oligo-optical period,and provide reference for the selection of fill light for Myrica rubra facility in rainy season.The study yielded the following results:1.The fill light of different red and blue light mixing ratios will help the vegetative growth of the plants during the plum season and rainy season;the blue light in the visible light ratio will help the plants to grow laterally;the red and blue light ratio is 5:1 LED growth light The vegetative growth of the treated Myrica rubra plants was relatively strong,and the average fruit weight of the Myrica rubra under the treatment was significantly higher than that of the control at each period.2.During the three growth stages of fruit growth,as the fruit matured,the accumulation of sugar,SS and SPS activities increased steadily,and the changes of SPS activity and SS activity in the leaves were also close to the same,showing a steady upward trend;Myrica rubra is beneficial to the ripening of fruits and the accumulation of sugar under the supplement of LED with a large proportion of red light.The effect of LED growth lamps is better;the SS of the treatment group with high red light ratio is correspondingly higher,and the proportion of red light decreases.The proportion of blue light increased,and the regularity of enzyme activity decreased correspondingly,indicating that the plum fruit is beneficial to fruit ripening and sugar accumulation under the supplement of LED with large red light ratio.3.Different red and blue light mixing ratios of the fill light are beneficial to improve the fruit quality,while the red and blue light ratio of the 5:1 LED growth lamp treatment of the fruit soluble solids and vitamin C content are the highest,acid content At the lower level,the fruit quality is better under this light-filling treatment;the light quality indicators of the same light-quality ratio type are about the same under 480 lx and 600 lx light intensity.Under the red and blue fill light with the same light quality ratio,the influence of different light intensity is small.The comprehensive analysis shows that in the southern rainy season,the LED light with a red-blue ratio of 5:1 can be recommended as the fill light for the growth of the Myrica rubra.