PBO在杏树上的应用研究

Study on Application of PBO on the Apricot

[目的]探讨微量元素叶面肥PBO在杏树上的增产效果。[方法]2004～2007年于杏树花前1周、新梢长出7～8片叶、6月初、7月中旬各喷施1次150～300倍液的PBO,喷洒清水为对照。[结果]与不喷施PBO对照比较,喷施4次PBO的杏树,4年平均短果枝率比对照提高25.1个百分点,成花率提高34.4个百分点,坐果率提高21.0个百分点,单果重提高18.8 g,优质果率提高15.9个百分点;4年平均每株产量提高7.86 kg,平均每公顷产量提高12 900 kg,增产260.8%,增产效果显著。[结论]杏树喷施PBO可抑制新梢的旺长,增加贮藏营养积累,增强保水力,提高短果枝率比例,促进花芽分化和形成,提高成花率、坐果率和单果重,是取代环剥、扭梢和多效唑的有效途径。

[Objective]This study aimed to explore the effect of foliar microelement fertilizer PBO on increasing yeild of apricot.[Method] With Spraying water as control group, PBO with the liquid in dilution of 150-300 times was sprayed on apricot one time resp. in the 4 periods from 2003 to 2007 including one week before flowering, 7-8 new shoots, early June and Mid-July. [Result] Compared with control, spraying PBO on the apricot for 4 times was more remarkable than control; 4-year average short branches, flower formation rate, fruit-setting rate, single fruit weight and fruit quality were increased by 25.1%, 34.4%, 21.0%, 19.5 g and 15.9%, resp. ; 4-year average yield per plant was increased by 7.86 kg, the average yied per ha.increased by 12 900 kg., increasing 260.8%, which had obvious effect of increasing yield. [Conclusion] Spraing PBO on apricot can inhinbite vigorous growth of new shoot, increase the accumulation of stored nutrient, enhanced water retention capacity, enhance the proportion of short .fruiting branches, and promote flower bud differentiation and formation, increase flower formation rate, fruit-setting rate and single fruit weight, which is an effective way that replaced girdling, wresting shoot and PP333.