‘Korla fragrant’ pear has a long history of cultivation in Xinjiang, China, with favorable economic and social benefits. The selection of tree growth has a direct impact on improvements in fruit yield and quality. In order to provide a theoretical basis for the efficient and high-quality cultivation of ‘Korla fragrant’ pear, two ‘Korla fragrant’ pear tree growth forms, namely trunk shape and small-canopy shape, were selected as experimental materials to study the differences in the parameters of different tree growth forms, as well as the effect on photosynthetic activity and fruit quality. The results show that the small-canopy-shape trees exhibited significantly improved photosynthetic activity, with a 60.64% higher net photosynthetic rate (Pn) in the upper canopy compared to the trunk-shape trees. Fruit quality was also superior in the small-canopy-shape trees, with increases in single-fruit weight (29.36–46.91%), soluble solids content (13.51–14.39%), soluble sugar content (25.79–27.56%), and vitamin C content (up to 0.4363 mg·100 g⁻¹ in the upper layer). However, the yield per unit area of the trunk-shape trees was significantly higher than that of the small-canopy-shape trees by 19.32% because of the higher number of short fruit branches and increased prevalence of smaller row spacing. In addition, within the same tree growth forms, photosynthetic activity and fruit quality were improved in the upper layers compared to the lower layers.

To provide a scientific basis for simplified, high-efficiency cultivation and precise quality regulation of the elite fresh jujube line MX5N3, this study employed MX5N3 (bred by Tarim University) as the experimental material. During the critical period of fruit development, different concentrations of pyroligneous acid (PA), melatonin (MT), and graphene oxide (GO) were applied via irrigation. Indicators including appearance quality, internal quality, texture properties, and yield were systematically determined. Variance analysis, correlation analysis, and principal component analysis were utilized to analyze fruit quality differences under different biostimulant treatments, and a comprehensive quality evaluation was conducted. Under the evaluation metrics and experimental conditions employed in this study, the treatment with melatonin (0.024‰) yielded the highest comprehensive score. It significantly promoted the accumulation of vitamin C and phenolic substances, enhanced the firmness of both the peel and flesh, and reduced the fruit cracking rate by 57.57%. The GO (0.5‰) treatment increased soluble sugar content and sugar–acid ratio by 14.45% and 27.82%, respectively, yet led to a slight softening of fruit texture. The PA (5‰) treatment increased yield by 62.09% and significantly elevated protein content by 41.48%.