4种植物补光灯在大棚越冬番茄生产中的应用效果评价OA

Insufficient light is a common limiting factor in greenhouse cultivation,and artificial supplemental lighting is an effective way to improve low-light conditions.This study aimed to screen out suitable types of plant growth lights for supplemental lighting in greenhouses.Taking'ST Shitou'as the test material,four supplemental lighting treatments were set up using different plant growth lights:LED fin lights placed 1.8 m above the furrow surface over the plants(L1),LED light strips placed 1.8 m above the furrow surface over the plants(L2),LED tube lights placed 0.5 m above the furrow surface between plants(L3),and laser lights placed 0.5 m above the furrow surface between plants(L4).Supplemental lighting was applied from 5:30 to 8:30 and 17:30 to 22:30 every day,with a non-supplemental lighting group set as the control(CK).The effects of different types of plant growth lights on the morphology,physiology,yield and quality of greenhouse tomatoes were studied.The results showed that all the four supplemental lighting treatments promoted the growth of tomato plants to varying degrees and simultaneously improved their yield and quality.Compared with CK,L1 treatment significantly increased plant height and stem diameter,and the contents of soluble sugar and starch in its leaves were the highest among all treatments;L2 treatment had the highest amino acid content in leaves,which was significantly superior to other treatments;L3 treatment achieved the highest plant height,stem diameter,fruit sugar-acid ratio,total phenol content,number of colored fruits and number of fruits per plant,all of which were significantly higher than those in CK;L4 treatment promoted the accumulation of photosynthetic pigments,in which the contents of chlorophyll a,chlorophyll a+b and carotenoids were significantly higher than those in other treatments.Compared with CK,the fruit yield per plant of L1,L2,L3 and L4 treatments increased by 14.29%,6.40%,31.53%and 4.43%,respectively.Based on economic benefit analysis and fuzzy membership function evaluation,the LED tube lights treatment had the best economic benefit and the highest comprehensive evaluation value of yield and quality.Therefore,it is recommended to adopt LED tube lights for inter-plant supplemental lighting in greenhouse tomato cultivation.The results of this study provide technical support for the application of supplemental lighting in greenhouse tomato cultivation and the use of plant growth lights in agricultural lighting.