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对31个陇东旱塬苹果园苹果树叶片鲜重、干重、含水量、叶厚、叶绿素含量、叶面积和叶片全N、全P、全K、全Ca进行了测定。结果表明:苹果树叶片鲜重、干重、叶厚、叶绿素含量、叶面积及含水量均表现正常,果园间变异程度不大;叶片全N含量在2.10%~2.50%,果园间变异系数9.02%,弱度变异,平均值2.32%,基本接近标准值2.33%;叶片全P含量在0.12%~0.29%,平均为0.19%,比标准值低0.04%,果园间变幅较大,变异系数为19.33%;叶片全K含量在0.84%~1.94%,平均为1.31%,比标准值低0.21%,变异系数高达21.12%;叶片全Ca含量在1.37%~2.34%,平均为1.80%,远大于标准值1.40%,变异系数11.67%;N∶P∶K=12.2∶1∶6.8。
The fresh weight, dry weight, water content, leaf thickness, chlorophyll content, leaf area and total N, total P, total K and total Ca in apple orchard of 31 Longdong dry orchards were determined. The results showed that the fresh weight, dry weight, leaf thickness, chlorophyll content, leaf area and water content of apple tree all showed normal, and the variation among orchards was not significant; the content of total N was 2.10% ~ 2.50% and the coefficient of variation between orchards was 9.02 %, The variation of weakness, the average value of 2.32%, basically close to the standard value of 2.33%; leaf P content of 0.12% ~ 0.29%, an average of 0.19%, 0.04% lower than the standard value, large changes in orchards, coefficient of variation The average K content of leaves was 0.84% -1.94%, with an average of 1.31%, lower than the standard value of 0.21%, the coefficient of variation as high as 21.12%; leaf Ca content of 1.37% ~ 2.34%, an average of 1.80% The standard value of 1.40%, coefficient of variation of 11.67%; N: P: K = 12.2: 1: 6.8.