摘要
Abstract
[Objective]To investigate the improvement effect of"Heisongtu"Humic Acid Type Ⅲ Soil Conditioner on soil physical and chemical properties in arid and semi-arid regions,as well as its enhancing effect on apple yield and quality,and to clarify the optimal application ratio and technical mode of this conditioner in apple orchards in Maiji District.[Methods]A fixed-position field experiment was conducted in Diaobaoliang Village,Mapaoquan Town,Maiji District,Tianshui City from 2024 to 2025.Three treatment groups were set up,namely conventional fertilization(CK),soil conditioner combined with conventional fertilization,and soil conditioner combined with humic acid organic-inorganic fertilizer and functional package.The effects of different treatments on soil nutrient contents,apple yield and quality indicators were systematically analyzed.[Re-sults]The combined application scheme,i.e.,applying 40 kg of Soil Conditioner Type Ⅲ,50 kg of humic acid organic-inor-ganic fertilizer(10-5-20)and 20 kg of functional package per 3 mu of orchard(667 m2),yielded the optimal effect.Com-pared with the pre-experiment level,the soil organic matter content increased by 86.8%,available phosphorus content rose by 179.64%,alkali-hydrolyzable nitrogen content increased by 139.17%,and available potassium content grew by 54.38%.The apple yield reached 2 037.2 kg per mu,representing an increase of 18.26%compared with the CK group.In terms of fruit quality,compared with the CK group,the fruit firmness,soluble solids content,soluble sugar content and vitamin C content increased by 22.72%,25.15%,21.26%and 21.26%respectively,while the titratable acid content decreased by 20.00%.[Conclusion]The application ratio of Treatment 3 improves soil structure and enhances nutrient supply capacity,while achie-ving the synergistic improvement of both apple yield and quality,and thus is suitable for popularization and application in actual production.The research results provide scientific basis and technical support for the quality and efficiency improvement,as well as fertilizer reduction and efficiency increase of apple orchards under arid conditions in Maiji District.关键词
苹果/腐殖酸土壤调理剂/土壤养分/产量/品质Key words
apple/humic acid soil conditioner/soil nutrients/yield/quality分类
农业科技
