油茶果实生长高峰期养分分配特征

Nutrient distribution characteristics of Camellia oleifera in fruit growth peak period

以6年生油茶林为研究对象,研究了油茶果实生长高峰期油茶各器官养分分配特征规律。结果表明:1)油茶N、P、K、Ca、Mg、Cu、Fe、Zn、Mn等元素含量均受不同器官和不同时间的影响,并呈现极显著(P <0.01)的差异。2)5月与8月油茶各器官的N、P、Ca含量均以叶片最高;5月K含量以叶片最高,8月则以果实最高;Mg的含量均以根最高。3)与5月相比,8月各器官P、K以及N(果、叶、枝、干)、Mg(果、叶、根)、Ca(干、根)含量减少了2.08%～59.58%,而根系的N含量、枝与干的Mg含量以及果、叶与枝的Ca含量则增加了3.19%～90.60%。4)Cu、Zn含量均以枝最高,Fe含量以根最高,Mn含量以叶最高。5)与5月相比,8月各器官Mn含量、叶Fe含量, Zn含量(枝、干、根)增加了1.36%～171.15%;而各器官Cu、Fe(果、根、枝、干)、Zn(果、叶)含量则下降了10.44%～88.99%。6)本研究发现在果实生长高峰期油茶叶片具有很高N∶P,各主要器官的N、P、K、Cu含量较大幅度降低,大量K向果实转移。

Taking 6-year-old Camellia oleifera forest as the test object, Nutrient distribution characteristics of different organs in fruit growth peak period were studied. The results show that: 1) The contents of N, P, K, Ca, Mg, Cu, Fe, Zn, Mn and other elements in C. oleifera were different in different organs and at different times, and there were significant differences among them (P < 0.01). 2) In May and August, the N, P and Ca contents in all organs of Camellia oleifera were the highest in leaves;K contents in May were the highest in leaves, while fruit contents in August were the highest;Mg contents in roots were the highest. 3) Compared with in May, the contents of P, K, N (fruit, leaf, branch, stem), Mg (fruit, leaf, root), Ca (stem, root) decreased by 2.08%~ 59.58% in August, while the contents of N, Mg in root, branch and stem, and Ca in fruit, leaf and branch increased by 3.19%~ 90.60%. 4) The contents of Cu and Zn in branches were the highest, Fe in roots was the highest, and Mn in leaves was the highest. 5) Compared with May, the contents of Mn in all organs and Fe in leaves and Zn(in branch, stem, root) increased by 1.36%~ 171.15% in August, while the contents of Cu, Fe ( in fruit, root, branch, stem) and Zn (in fruit, leaf) decreased by 10.44%~ 88.99%. 6) It was found that the leaves of C. oleifera had a high N ∶ P ratio during the peak period of fruit growth. The contents of N, P, K and Cu in the main organs were significantly reduced, and a large amount of K was transferred to the fruits.