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。
The Fuji, Ralls 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.
利用强筋冬小麦品种烟农15研究了钾素对小麦旗叶蛋白质含量和籽粒品质及有关酶活性的影响。
The effect of potassium on flag leaf protein content and kernel quality as well as enzyme activity in wheat was investigated using wheat cultivar Yannong 15 with strong gluten potential.
土样检测发现正常棉叶田所采土样中全氮、全钾含量比红叶田土样减少34.7%和13.9%。
Content of azote and kalium in the soil of normal field is 34.7% and 13.9% less than in red leaf field.
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