燕山山区苹果叶片氮 磷 钾含量标准范围的确定

Study on the Standard Range of Nitrogen,Phosphorous and Potassium of Apple Leaf in Yanshan Mountain Area

采集了燕山山区20个苹果园富士、国光和金冠等品种的120份叶样,对叶片中氮、磷和钾含量进行了分析。结果表明:不同果园不同品种苹果叶片营养元素含量变异较大。苹果叶片中N、P、K元素的取值遵从正态分布,用4点5分段的概率分级法,确定了3个品种叶营养元素含量标准值中的缺乏、低值、正常值、高值、过高5个数值范围。与国内外标准相比,燕山山区标准值表现出N水平高,P和K水平低的特点。

The Fuji, Rails and Golden Delicious of apple varieties, 120 samples were collected from 20 orchards in Yanshan mountain area and the leaf N, P, K contents were analyzed. The results showed that apple leaf nutrition contents in different orchards and in different varieties had a large difference. Leaf N, P, K contents complied with normal distribution. According to probability grading, the absence, low value, normal value, high value, excess of standard ranges of nutritional elements were presented. In Yanshan mountain area, higher N content of apple leaf, lower P and K content were the significant characteristics comparing with domestic and international standards.