杜梨生长期叶片、新梢和根中矿质营养含量的变化  

Changes of Mineral Nutrition in Leaves,Shoots and Roots during the Growing Period of Pyrus betulaefolia

作　　者：宗宇[1] 宋健坤[1] 赵娜娜[1] 王然[1] 

机构地区：[1]青岛农业大学园林园艺学院,山东青岛266109

出　　处：《青岛农业大学学报（自然科学版）》2011年第4期279-283,共5页Journal of Qingdao Agricultural University(Natural Science)

基　　金：现代农业产业技术体系建设专项资金资助(nycytx-29-06);青岛市科技支撑项目(08-2-1-34-nsh);山东省良种工程项目资助

摘　　要：以杜梨(Pyrus betulaefolia Bge.)为试材,研究了生长期内矿质营养(N、P、K、Ca、Mg、Fe、Cu、Mn和Zn)在叶片、新梢和根中的含量变化。结果表明,杜梨叶片、新梢和根中各矿质营养含量差异较大,且表现出明显不同的变化动态。除Fe外,N、P、K、Ca、Mg、Cu、Mn和Zn 8种元素在叶片中的含量均高于根;根中N、P、K、Ca、Mg、Cu、Mn和Zn元素在7月2日均有一个峰值,而叶片中仅有K同期出现峰值,P、Cu同期为含量较低点;新梢中P、K、Cu、Zn 4种元素含量与叶片中的含量相近,且变化趋势相似,新梢中Fe的含量在整个生长期始终低于根中的含量。Changes of mineral nutrition in leaves, shoots and roots of Pyrus betulaefolia during the growing period were studied. The results showed that changes of mineral nutrition, including N, P, K, Ca, Mg, Fe, Cu, Mn and Zn, in leaves, shoots and roots were obviously different and changed greatly during growing period. Contents of N, P, K, Ca, Mg, Cu, Mn and Zn in leaves were higher than those in roots except for Fe and the changes of contents in leaves and roots during growing period were very different. The highest contents of N, P, K, Ca, Mg, Cu, Mn and Zn in roots all appeared on July 2. However, only K reached the highest level in leaves on July 2 and the level of P and Cu decreased to a low point at the same time. The contents and changes of P, K, Cu and Zn in shoots were similar to those in leaves, The content of Fe in shoots was lower than that in the roots during the whole growing period.

关 键 词：杜梨 叶片 新梢 根 矿质营养 

分 类 号：S661.2[农业科学—果树学]