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针对苹果生产中有机肥料投入数量不足,部分果园立地条件差,土壤保水保肥能力差,集约化果园氮磷化肥用量普遍偏高,非石灰性土壤老果园土壤酸化现象普遍,中微量元素钙、镁和硼缺乏时有发生,石灰性土壤地区果园铁、锌和硼缺乏问题普遍,部分地区果农对基肥秋施的认识不足以及春夏季果实膨大期追施氮肥数量和比例偏大等问题,提出以下施肥原则:1.增施有机肥,提倡有机无
In view of the lack of input of organic fertilizer in apple production, poor site conditions in some orchards, poor soil water retention and fertilizer retention capacity, generally high levels of nitrogen and phosphorus fertilizer in intensive orchard, soil acidification in old orchards of non-calcareous soil was widespread, Magnesium and boron deficiency occur from time to time. Problems of iron, zinc and boron deficiency are common in orchards of calcareous soil. In some areas, farmers’ knowledge of autumn fertilization of basal fertilizers is inadequate and the quantity and proportion of topdressing nitrogen fertilizers in spring and summer are exaggerated The following principles of fertilization: 1. Increase of organic fertilizer to promote organic no