Abstract: [Objective] This project aims to compare the effects of compound reagent "M" and PBO on calyx dropping rate, fruit setting rate and fruit quality index of Korla fragrant pear in order to provide application technology and theoretical basis for its high yield, good quality and sustainable development.[Method]The Korla fragrant pear at full-bloom stage was used as test materials to determine the calyx dropping rate, fruit setting rate and fruit quality treated with different concentrations of compound reagent "M" and PBO.[Result]The calyx dropping rate, fruit setting rate and fruit quality of Korla fragrant pear were significantly increased after spraying different concentrations of compound reagent "M" and PBO, among which, the M1 treatment had the most significant effect, its non-calyx fruit rate, fruit setting rate of flower were 83.3; and 11.7;, 42.1; and 4.8; respectively higher than those of the CK (control), 18.4; and 2.6; respectively higher than those by PBO treatment;The anthocyanin and chlorophyll contents of M1 treatment were the highest, which were significantly higher than those by PBO treatments, but its carotenoid content was the lowest;Compared with CK, VC content, sugar content, soluble solid content and solid acid ratio of Korla fragrant pear were significantly increased than those by both PBO and M1 treatments, but Tannin content and titratable acid content were significantly decreased.Among them the M1 treatment had a significantly higher sucrose and total sugar content than the PBO treatment.The fructose content was significantly higher than that of PBO treatment and its tannin content was significantly lower than that of PBO treatment, and there was no significant difference among other fruit quality indexes.[Conclusion]The compound reagent M1 sprayed at full-bloom stage can significantly increase the non-calyx fruit rate, fruit setting rate and fruit quality, which has popularization value in production of high yield and good quality of Korla Fragrant Pear.

摘要： [目的]对比分析复合试剂"M"和PBO对库尔勒香梨脱萼率、坐果率和果实品质指标的影响,为库尔勒香梨高产优质可持续发展提供科学的应用技术和理论依据.[方法]以盛果期的库尔勒香梨为研究对象,在其盛花期喷施不同浓度的复合试剂"M"和PBO,测定其脱萼率、坐果率及部分果实品质指标.[结果]喷施不同浓度的复合试剂"M"和PBO均明显提高了库尔勒香梨的脱萼率和坐果率,改善了果实品质,其中M1试剂的效果最显著,其脱萼率、花朵坐果率分别为83.3;和11.7;,比CK(对照)分别高42.1;和4.8;,比PBO处理分别高18.4;和2.6;;M1处理的果实花青素和叶绿素含量也均最高,极显著高于PBO处理,其类胡萝卜素含量反而最低;与CK相比,PBO和M1处理均明显提高香梨果实VC含量、糖含量、可溶性固形物含量和固酸比,降低单宁和可滴定酸含量,其中M1处理的果实蔗糖和总糖含量均极显著高于PBO处理,果糖含量显著高于PBO处理,单宁含量反而显著低于PBO处理,其它果实品质指标间均无显著差异.[结论]盛花期喷施复合试剂M1,能够显著提高库尔勒香梨脱萼率、坐果率,提升果实品质,在库尔勒香梨高产优质生产中具有推广价值.