陕西地区苹果叶营养元素标准范围的确定  

Studies on the Standard Range of Apple Leaf Nutritional Elements in Shaanxi Province

作　　者：安贵阳[1] 史联让[1] 杜志辉[1] 郁俊谊[1] 邓丰产[1] 

机构地区：[1]西北农林科技大学园艺学院,杨凌712100

出　　处：《园艺学报》2004年第1期81-83,共3页Acta Horticulturae Sinica

基　　金：国家科技攻关项目 ( 2 0 0 2BA5 16A10 )

摘　　要：对苹果叶营养水平状况研究表明 ,N、P、K、Ca、Mg、B等 6种元素的取值遵从正态分布 ,Cu、Fe、Mn、Zn近似X2 分布。对于符合正态分布的元素可用 4点 5分段的概率分级法 ,使 1～ 5级分别对应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 ,各级出现的叶样概率分别为 10 %、 2 0 %、 4 0 %、 2 0 %和 10 % ,其中处在第 3级的叶样占总样本的 4 0 % ,叶分析值在 (X - 0 5 2 4 6S )～ (X +0 5 2 4 6S)可作为标准值中的正常值范围 ,这与通过高产水平果园叶分析值制定的正常值非常接近。对于不符合正态分布的元素 ,可参考高产水平果园的叶分析值对概率分级法进行矫正。据此制定出陕西苹果叶营养元素含量标准值 ,与国内外标准相比 ,陕西标准值表现出N、Ca、Mg、Cu水平高 ,P、Zn、Fe、K水平低 ,Mn。According to the results of X 2 test,the distributions of N,P,K,Ca,Mg,B content in leaves conformed to the normal distribution, but those of Cu,Fe,Mn,Zn looked rather like X 2 distribution.The values of normally distributed characters could be divided into 5 grades by 4 dividing points(standardized probability grading-SPG method),presented the absence,low value,normal value,high value,excess of standard range of nutritional elements,and the occurrence probability of 1-5 grades is 10%, 20%, 40%, 20% and 10% respectively.The third grade,which valued from(X-0.5246S) to (X+0.5246S),could be the normal value of standard range,rather same to the average value of leaf nutritional elemets in high yield orchards.The values of X 2 distributed characters graded by SPG method could be corrected by the average value of leaf nutritional elemelnts in high yield orchards.Therefor,proposed the standard range of apple leaf nutritional elements of Shaanxi province,compared to the others,the characteristics of N,Ca,Mg,Cu are higher,P,Zn,Fe,K are lower,Mn,B are same to.

关 键 词：陕西 苹果 叶片 营养元素含量 标准值 分布规律 变异 

分 类 号：S661.1[农业科学—果树学]