果树资源学报2026，Vol.7Issue(3)：5-9,15,6.
4种植物生长调节剂对库尔勒香梨枝条控旺和果实品质及产量的影响研究
Effects of Four Plant Growth Regulators on Shoot Controlling,Fruit Quality and Yield of Korla Fragrant Pear
摘要
Abstract
[Objective]Korla fragrant pear production is restricted by various factors,among which excessive tree vigor and overgrowth of upper canopy shoots are prominent problems.Excessive vegetative growth leads to overconsumption of tree nutrients,which affects flower bud formation and development as well as shoot cold resistance.Therefore,this experiment was conducted to screen suitable plant growth regulators to solve the problems of vigorous tree growth,easy shoot overgrowth and difficult tree form control,so as to effectively improve fruit yield and quality.[Methods]Using high-yield Korla fragrant pear as experimental material,four plant growth regulators including prohexadione-calcium,uniconazole,strigolactone and maleic hydrazide were applied at different concentrations.Their effects on shoot growth,leaf area variation,leaf physiological indexes,fruit quality and yield were compared.[Results]Uniconazole at 250 mg/L reduced shoot length,diameter and leaf area by 7.17 cm,0.65 mm and 3.2 cm2,respectively,increased single fruit weight by 3.02 g and decreased titratable acid by 0.14%.Prohexadione-calcium at 300 mg/L significantly increased leaf SPAD value and net photosynthetic rate by 4.66 and 2.75 μmol·m-2·s-1,elevated soluble sugar content by 2.92%,improved fruit setting rate per plant,and increased yield by 28 268.37 kg per hectare.At low concentrations,strigolactone and maleic hydrazide inhibited shoot growth and enhanced pho-tosynthesis,but their effects were weaker than those of uniconazole and prohexadione-calcium.In addition,spraying strigolac-tone and maleic hydrazide improved fruit quality but inhibited single fruit weight.[Conclusion]Prohexadione-calcium,uni-conazole,strigolactone and maleic hydrazide all inhibited shoot elongation of Korla fragrant pear and affected leaf fluorescence coefficient,photosynthetic capacity,fruit quality and yield.However,uniconazole and prohexadione-calcium were superior to strigolactone and maleic hydrazide in controlling shoot overgrowth,improving fruit quality and increasing yield.关键词
库尔勒香梨/植物生长调节剂/控旺/果实品质/产量Key words
Korla fragrant pear/plant growth regulators/shoot controlling/fruit quality/yield分类
农业科技引用本文复制引用
常学艳,崔钰雪,牛蛉磊,钱丹丹,吉光鹏..4种植物生长调节剂对库尔勒香梨枝条控旺和果实品质及产量的影响研究[J].果树资源学报,2026,7(3):5-9,15,6.基金项目
新疆农垦科学院青年项目(2024YJQN18) （2024YJQN18）
