Effects of Y-shaped training on tree growth and photosynthesis and fruit quality in peach
Peach orchard mechanised cultivation is an effective way of efficient and labour-saving cultivation,and Y-shaped is a commonly used shaping method for labour-saving cultivation in new peach orchards,but its effect on tree growth and fruit quality has not been systematically investigated compared with the traditional three-primary-branch open-heart.In this experiment,the new peach variety'Xiacui'was used as the material,and the effects of Y-shaped on tree growth,photosynthesis,yield and fruit quality of young trees and adult trees were investigated by using the open-heart as a comparison.The leaf mass of different crowns of peach trees was measured,and it was found that the chlorophyll content and specific leaf weight showed the same trend,and the mean values of total chlorophyll content of the upper,middle and lower leaves of the Y-shaped of the adult trees in Jurong were 3.06,2.09,1.83 mg/g and 2.14,1.88,1.75 mg/g,respectively.The mean values of specific leaf weights of upper,middle and lower leaves of Jurong adult Y-shaped annual trees were 10.67,8.31,8.12 g/cm2 and 7.79,7.12,6.49 g/cm2 in July and August,respectively,and all of them showed that the upper layer was significantly larger than the middle layer significantly larger than the lower layer.The chlorophyll content of young trees were 1.62 mg/g and 1.59 mg/g in July and August,respectively,and the specific leaf weights were 7.19 g/cm2 and 8.34 g/cm2.The results showed that the chlorophyll content and specific leaf weight of adult trees in Jurong and young trees in Zhenjiang were significantly larger than those of the open-heart,so the leaf quality of the Y-shaped shaping method was significantly better than that of the open-heart.The net photosynthetic rate of the adult trees in Jurong was 31.77 μmol·m-2·s-1 in July during the fruiting period,which increased by 28.36%compared with that of the open-heart,and that of young trees was 33.14 μmol·m-2·s-1,which increased by 67.12%compared with the open-heart,and showed the same trend in transpiration rate and stomatal conductance,with the photosynthetic capacity of the Y-shaped significantly better than that of the open-heart.Comparative analysis of the fruit quality of adult trees in Jurong found that the fruit solid-acid ratio of the Y-shaped can reach 33.88,which is 6.14 larger than that of the open-heart,and the fruit solid-acid ratio of the Y-shaped is better than that of the open-heart,and the yield of adult trees in Jurong Y-shaped can reach 3,694 kg per 667 m2,which is 1,312 kg higher than that of the open-heart.The results of the study for the modern peach orchard to adopt the Y-shaped of the tree machine efficient cultivation to provide a theoretical basis.
peachtree training systemphotosynthesisfruit quality
万方数据
维普
