荔枝品种生长势与树体营养的关系研究

Studies on the Relationship between Growth Potential and Tree Nutrition in Litchi Cultivars

为探明荔枝品种树体营养物质含量对生长势的影响,以2个弱生长势品种和7个强生长势品种为材料,测定茎干、枝叶形态特征及叶片有机和无机营养含量.结果表明,2个弱生长势品种的株高、梢长、节间距、叶宽、叶面积和叶长均小于强生长势品种;且弱生长势品种叶片的可溶性糖、淀粉和蛋白质的含量高于强生长势品种,而钾、锰和铜的含量低于强生长势品种.此外,荔枝品种株高与叶片淀粉含量呈显著负相关,与总碳和氮含量呈极显著负相关,而与氨基酸含量呈显著正相关.叶面积与叶片氨基酸和磷含量呈极显著正相关,与锌含量呈显著正相关.

In order to investigate the effect of nutrient contents on the growth potential of litchi cultivars. In this study,two weak growth potential cultivars and seven strong growth potential cultivars were as plant materials to determine the stem,leaf morphological characteristics and the contents of leaf organic and inorganic nutrient. The results showed that plant height,shoot length,pitch spacing,leaf width,leaf length and leaf area in the two weak growth potential cultivars were smaller than those in the seven strong growth potential cultivars. And the contents of soluble sugar,starch and protein of weak growth potential cultivars higher than strong growth potential cultivars,while potassium,manganese and copper content were lower than strong growth potential cultivars. In addition,the plant height was negatively correlated with the starch content of leaves in litchi,and was negatively correlated with total carbon and nitrogen content,but was positively correlated with the content of amino acid. The leaf area was positively correlated with the contents of amino acids and phosphorus,and was positively correlated with zinc content.