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1999年在本县良种场老梨园进行本试验。供试奥普尔为有机腐植酸活性液肥 ,型号为广谱型ＨＡ 2 0 2。供试梨树为 2 6年生衰老黄花梨树 ,平地果园 ,粘壤土 ,株行距 4 5ｍ× 4 5ｍ。土施与叶面喷施结合。土施分别于休眠期 (2月 2 7日 )和花期 (3月17日 )进行 ,浓度 30 0倍液
In 1999 in the county old pear market for the test. For the experimental Opal organic humic acid active liquid fertilizer, model broad spectrum HA202. The test pear is a 26-year-old aged pear tree, flat orchard, clay loam, spacing 45m × 45m. Soil facilities and foliar spray combined. Soil facilities were in dormant period (February 27) and flowering (March 17), the concentration of 30 times the solution