关键词: HPS生物有机肥, 土壤养分, 苹果（Malus pumila Mill.）, 叶片养分, 果实品质, 阿克苏地区

Abstract: Taking apple （Malus pumila Mill.） as material and HPS bio-organic fertilizer as the research object, two treatments of HPS bio-organic fertilizer were set up, with application rates of 24 and 15 kg per plant, respectively, a 50% reduction in chemical fertilizer was conducted, and conventional fertilization was used as the control （CK）. The effects of HPS bio-organic fertilizer on soil nutrients in apple orchard, apple leaf nutrients and fruit quality were investigated. The results showed that, compared to CK, the soil nutrient content, apple leaf nutrient content and fruit quality of the two HPS bio-organic fertilizer treatments were improved. The treatment with 24 kg per plant of HPS bio-organic fertilizer showed the highest improvements, with significantly increased levels of soil available nitrogen, soil available phosphorus, soil available potassium, leaf total nitrogen, leaf total phosphorus, leaf total potassium, single fruit weight and longitudinal diameter, soluble solids, soluble sugar content, and vitamin C content （P<0.05）. This indicated that applying HPS bio-organic fertilizer under reduced chemical fertilizer conditions could enhance soil nutrients, leaf nutrients, and fruit quality, with 24 kg per plant being the optimal application rate.

Key words: HPS bio-organic fertilizer, soil nutrient, apple（Malus pumila Mill.）, leaf nutrient, fruit quality, Aksu region