Study on Annual Change Rule of Nutritive Elements in Young and Mature Leaves of Yali Pears(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Study on Annual Change Rule of Nutritive Elements in Young and Mature Leaves of Yali Pears

Author(s):: LU Wei-hong¹; 2; ZHANG Yu-xing¹; 1.College of Horticulture,Agricultural University of Hebei,Baoding,Hebei 071001;
2.Baoding Vocational and Technical College,Baoding,Hebei 071051

Abstract:: Taking 4-year-old and 10-year-old pear as materials,the contents of mineral elements in the young and mature leaves of Yali pears in different growth periods were measured,to reveal the nutritional requirement and the difference distribution of the young and mature Yali pears’ trees.The results showed that the annual changes of 10 kinds of nutritive element showed the same pattern in both mature and young trees.The contents of N,P,K and Cu were peaked in the leaf flushing period,and then would reduce gradually as the foliar age increased.The contents of Zn and B went down at the beginning,then increased gradually,and maintained a certain level after Mid June.The contents of Mn,Fe,Mg and Ca would increase gradually along with leaf growth,and peaked in the defoliation stage,during which the Ca element content increased rapidly.The contents of K and Mg in the leaves of mature trees were higher than those of young trees,but the contents of P,Ca,Fe,Cu,Zn and B in the leaves were less.The contents of N and Mn in the leaves of mature trees were higher than those of young trees before June,but thereafter they were lower than those of young trees.

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Last Update: 2014-08-10