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国光苹果是宁夏主要晚熟优良品种。由于苦痘病(同时伴随有痘斑病)的为害,影响了该品种的商品价值和外销前景。随着果园氮肥施用量的增加,该病有日益严重的趋势。如农学院实验农场果园发病严重的植株,采收时病果率高达14.7％。经过人工挑选的无病果实,贮藏两个月后,有病斑症状的达12.9％。苦痘病是由于缺钙引起的一种果实生理病害。为了探讨在碱性土壤上,国
Guoguang apple is the main varieties of late-maturing Ningxia. As a result of bitter pox disease (accompanied by pox spot disease) damage, affecting the variety of commodity value and export prospects. With the increase of nitrogen fertilizer application in orchards, the disease has an increasingly serious trend. Such as agricultural college experimental farm orchard serious disease of plants, harvest disease rate as high as 14.7%. After a hand-picked disease-free fruit, after storage for two months, there were 12.9% of the symptoms of the lesion. Bitter pit disease is due to calcium deficiency caused by a fruit physiological disease. In order to explore the alkaline soil, the country