平欧榛子达维1年生枝条主要营养元素年动态规律研究

Research on annual dynamic changes of the contents and distributions of main nutrition elements in annual shoots of Corylus heterophylla×C.avellana

以平欧榛子达维为试材,测定1年生枝条生长发育期间N、P、K、Ca、Mg元素的含量,并分析其变化。达维1年生枝条内N、P、K含量以春季最高,7月下旬至11月下旬,N、P、K含量变化幅度不大,基本呈平稳态势。Ca、Mg含量以5月末至6月上旬为最高,在生长季内曲线总体呈双峰形。在生长季内,N元素在所测定元素中所占比例一直最高,K元素居第2位,Ca元素居第3位,P、Mg元素所居位置呈交替上升趋势,基本居于第4、5位。

The changes of contents and proportions of Nitrogen （N）, Phosphorus （P）, Potassium （K）, Calcium （Ca） and Magnesium （Mg） in annual shoots of hazel ＂Dawei＂ （Corylus heterophyllaxC.avellana） in different growth stages were studied. The contents of N, P and K in annual shoot of ＂Dawei＂ were highest in spring and kept stable from the last ten days of July to the last ten days of November. The contents of Ca and Mg in ＂Dawei＂ annual shoots were highest in the period from the end of May to the fu＇st ten days of June, and the annual dynamic change curve of the contents of Ca and Mg in annual shoots showed two peaks in growing seasons. In growing seasons, the portion of N was highest all the time in all tested dements in ＂Dawei＂ annual shoots, the portion of K was in the second place, the portion of Ca was in the third place, and the portions of P and Mg were raising alternately and basically in the fourth and fifth place.