Abstract: Over the past three consective years from 2010 to 2012, we have been taking application test which used the multi\|function Streptomyces TOR3209 as the primary biological organic fertilizer on pear trees for more than 25 years. The results showed that TOR3209 could promote the growth of old pear trees, which was reflected in the significant increase of regeneration roots and capillary roots; leaves increased in thickness and leaf biomass, the color turned from yellow to green, and the content of chlorophyll increased by 14.6%; the quality of fruits improved largely, that the content of soluble solids increased by 6.3%, and the firmness of fruits increased by 10.8%; the diversity of culturable bacteria in roots and rhizosphere soil also increased significantly. From above, we can drew the conclusion that multi\|functional biological organic fertilizers contributed to repairing and improving the growth of old pear trees through rhizosphere ecosystem, it had an expansive application prospect in the field of orchard improvement.

Key words: biological organic fertilizer, old pear trees, growth, quality, bacteria

摘要： 2010-2012年连续3年在河北赵县老梨区25年以上树龄梨树上进行以多功能链霉菌TOR3209为核心的生物有机肥的应用试验。结果表明, TOR3209生物有机肥能显著恢复老梨树的长势，表现为再生根和毛细根数量显著增多；叶片厚度和叶片生物量明显提高、颜色由黄转绿，叶绿素含量提高14.6%；果实品质显著改善，可溶固形物含量提高6.3%，硬度提高10.8%；根际土壤和根系内生可培养细菌多样性显著提高。表明多功能生物有机肥通过根际生态的修复改善老龄梨树的长势，在老果园改良方面具有广阔应用前景。

关键词: 生物有机肥, 老梨树, 生长, 品质, 细菌