枇杷树体矿质营养积累及分布特性

Accumulation and distribution of mineral nutrients in Loquat tree

为探明枇杷树体中矿质营养积累与分布情况,对30年生的枇杷树进行树体分解,分别测定果实、叶片、1～3年生枝、多年生枝、主干、根系的N、P、K、Ca、Mg、S、Fe、Mn、Cu、Zn、B营养的含量和累积量。结果表明:(1)叶中N、P、Mg、S、Mn、Zn含量最高,分别为14.88、1.13、3.00、1.00 g.kg-1、279.70和35.35 mg.kg-1。(2)多年生枝中N、P、K、Ca、Mg、S、Mn、Cu、Zn、B累积量最大,分别为789.67、72.6、402.89、1 772.74、145.04、35.54、7.58、0.67、2.88和1.55 g;主干中Fe累积量最大,为35.74 g。(3)每千克鲜重生物量中11种营养元素含量总和,主干含量最高为20.64 g.kg-1;其次为叶片,含量为20.21 g.kg-1;果实中含量最少,为2.32 g.kg-1。

Taken perennial ‘dahongpao’loquat tree as material,we tested the distribution and content of N,P,K,Ca,Mg,S,Fe,Mn,Cu,Zn and B in different organs of the tree.The results were as follows.（1） Contents of N,P,Mg,S,Mn and Zn were mainly distributed in leaves,which were 14.88,1.13,3.00,1.00 g.kg-1,279.70 and 35.35 mg.kg-1,respectively.（2） Accumulation amount of N,P,K,Ca,Mg,S,Mn,Cu,Zn and B were mainly distributed in perennial branches,which were 789.67,72.6,402.89,1 772.74,145.04,35.54,7.58,0.67,2.88 and 1.55 g,respectively;Fe accumulation amount in trunk reached to 35.74 g.（3） Content of total 11 nutrient elements in per kilogram biomass was 20.64 g.kg-1 in trunk（FW）,20.21 g.kg-1 in leaves（FW） and 2.32 g.kg-1 in fruits（FW）.