Effects of actinomycetes on growth physiology and fruit yield and quality of jujube tree in sandy area of southern Xinjiang
In order to explore the effects of actinomycetes on the growth physiology,yield and quality of jujube trees under desert soil conditions in southern Xinjiang,jujube orchards in typical sandy areas of Luopu County,southern Xinjiang were selected in this research,and four-year-old'Qiyuexian'jujube trees were grafted as the research object.Three kinds of actinomycetes with different dosage of 15,30 and 45 g·plant-1 were treated,and 0 g·plant-1 was taken as the control,and the growth,physiology,yield and fruit quality of jujube trees were measured.The results showed that the basal diameter of the first branch of the new jujube tree increased in August and September compared with the control,especially in the treatment of 30 g·plant-1,but there was no significant difference between the basal diameter of the second branch and the control.The leaf area increased significantly in July and August compared with the control under the treatment of 30 and 45 g·plant-1,but the leaf thickness only increased significantly in July.The relative chlorophyll content(SPAD value)and net photosynthetic rate(Pn)of leaves were significantly higher than those of the control in August,July,August and September,while the relative water content(LRWC)of leaves with only 30 g·plant-1 treatment was higher than that of the control.In July,the activities of superoxide dismutase(SOD)and phenylalanine ammonia-lyase(PAL)in leaves treated with actinomycetes were significantly higher than those of the control,while the activities of polyphenol oxidase(PPO)were also significantly higher than those of the control except for 15 g·plant-1 treatment.By August,the PAL activities of leaves tended to the control,and the SOD activities were still significantly higher than those of the control except for 15 g·plant 1,while the PPO activities were all significantly increased.The yield per plant and the weight of superior fruit of jujube under the treatment of actinomycetes were improved compared with the control,among which the difference was significant under the treatment of 15 and 30 g·plant-1,and the rate of superior fruit was significantly improved,but the rate of diseased fruit was not significantly different.The soluble solid content of fresh jujube treated with actinomycetes was higher than that of the control in white,crisp and complete ripening stages,especially in 30 and 45 g·plant-1 treatments,while the total sugar content and sugar-acid ratio of dried jujube were significantly higher than that of the control,and the titratable acid content was significantly reduced in 30 g·plant-1 treatment.To sum up,actinomycetes could promote the growth of jujube trees,enhance some important physiological functions of jujube trees,increase yield and improve jujube fruit quality.In the actual production of jujube orchards in sandy areas of southern Xinjiang,30 g actinomycetes could be applied to each plant in combination with basal fertilizer application in spring.
actinomycetessouth Xinjiang sandy areajujube treegrowth and physiologyyieldfruit quality
万方数据
维普
