不同树龄橡胶RRIM600养分含量比较研究

以不同年龄阶段的橡胶无性系RRIM600为研究材料，对各器官(树叶、鲜茎、树根、树皮、树干、胶乳)中五大养分元素N、P、K、Ca、Mg的含量进行研究。结果表明：(1)各养分元素在各器官中的高低顺序，树叶为：N＞K＞Ca＞Mg＞P；树枝为：K＞Ca＞N＞P＞Mg；树根为：Ca＞N＞K＞Mg＞P；树皮为：Ca＞K＞N＞Mg＞P；树干为：N＞K＞Ca＞Mg＞P；胶乳为：N＞K＞P＞Mg＞Ca。橡胶树各养分的高低顺序为：N＞Ca＞K＞Mg＞P。(2)不同器官所含养分的高低顺序，N含量高低顺序为：树叶＞树根＞树枝＞胶乳＞树皮＞树干；P为：树叶＞树枝＞树根＞胶乳＞树干＞树皮；K为：树叶＞树枝＞树根＞树皮＞胶乳＞树干；Ca为：树皮＞树根＞树枝＞树叶＞树干＞胶乳；Mg为：树叶＞树根＞树皮＞树枝＞树干＞胶乳。不同器官养分总含量高低顺序为：树叶＞树皮＞树根＞树枝＞胶乳＞树干。(3)各器官养分含量与月份和树龄之间建立的直线回归均达显著差异，橡胶RRIM600树叶、树枝、树皮、树干和胶乳养分含量主要受月份影响，树根主要受树龄影响；N、P、K、Ca、Mg均主要受月份影响。

Comparison of Mineral Element Contents in Different Aging Rubber Trees RRIM600

This experiment studied the content of five mineral elements (N, P, K , Ca and Mg) in organs (leaf, branch, root, bark, trunk and latex ) of rubber trees RRIM600. The results showed that: 1) there were differences in the content of mineral elements in organs: N>K>Ca>Mg>P in leaf, K>Ca>N>P>Mg in branch, K>N>Mg>Ca>P in root, Ca> K> N > Mg > P in bark, N > K> Ca> Mg> P in trunk, N > K> P> Mg> Ca in latex. The content of mineral elements from rubber trees was: N>Ca>K>Mg>P. 2) the content of mineral elements in different organs was: leaf> root> branch> latex> bark> trunk in N, leaf> branch> root> latex> trunk> bark in P, leaf> branch> root> bark> latex> trunk in K, bark> root> branch> leaf> trunk> latex in Ca, leaf>root>bark>branch>trunk>latex in Mg. The total mineral elements in different organs was: leaf>bark>root>branch>latex>trunk. 3) the linear regression established between different organs mineral contents, month age and tree age had a highly significant correlation. Leaf, branch, bark, trunk and latex of the rubber trees RRIM600 were mainly affected by the month age, but root was mainly affected by tree age. The content of N, P, K, Ca, Mg were mainly affected by the month age.