开花前后库尔勒香梨营养器官矿质元素含量的比较研究

Comparative Study on Mineral Elements Content in Nutrient Organs of Korla Fragrant Pear before and after Flowering

以10年、20年树龄库尔勒香梨枝条和叶片为试材,研究库尔勒香梨开花前的枝条和开花后叶片和枝条中的N、P、K、Ca、Mg、Zn、Fe等元素含量变化。研究结果表明,枝条中N含量增加,P、K、Ca、Mg、Zn、Fe含量都呈下降趋势,其中10年生树Zn、Fe含量下降明显,20年生树Zn含量没有变化,Fe含量变化较大;开花后叶片中N含量最高,Ca含量最低;库尔勒香梨不同树龄矿质元素变化没有明显差异;在开花前后Zn、Fe含量的需求量大,在开花后应注意微肥的及时补充。

In this experiment the 10 and 20 year-old Korla Fragrant Pear branches and leaves were used as experimental materials to comparatively study the seven mineral elements content such as N,P,K,Ca,Mg,Zn and Fe.The results showed that：In branches of the 10 and 20 year-old trees,the N content increased significantly;the content of P,K,Ca,Mg,Zn and Fe decreased gradually.Zn,Fe in 10 year-old trees decreased remarkably while the content of Zn in 20 year-old trees was stable and the Fe content declined by a big margin.In leaves,the content of Ca is in the lowest level while the content of N is keeping in the highest level after flowering.There was not any significant difference between the mineral elements content of the different year-old Korla Fragrant Pear;the demand of Zn,Fe content is higher before and after flowering,so it is the key to timely supply these two elements after flowering.