【摘要】 根据调查研究,田间试验和叶分析数据,从金冠苹果树病症程度和叶子硼的关系以及叶子硼与苹果产量间的相互关系,拟定了金冠苹果严重缺硼,中、初度缺硼,潜在缺硼和硼营养适宜等几项树体硼营养的诊断指标。更多还原

【Abstract】 Correlations were found between yields, severity of boron deficient symptoms and leaf boron content from data of survey and field experi-ments of ’Golden Delicious’ apple orchards in Mt. Liangshan region, Si-chuan. It showed that yield was correlated positively with leaf boron while severity of symptom was negatively. The diagnostic criteria of leaf boron with severe deficient symptom, mild and medium deficient symp-tom, with or without deficient symptom, potential deficient level and nor-mal nutritional status were<10, 10-19, 19-22, 22-27 and 27-45 ppm resp-ectively.更多还原