天童常绿阔叶林若干树种的叶片营养转移研究

对天童国家森林公园 1 8种植物在落叶前后营养转移量的研究表明 ,不同植物的营养转移率不尽相同 ,N的平均转移率为 3 7.86% ,标准偏差 1 0 .67% ;P的平均转移率为 44.76% ,标准偏差 1 5 .40 %。经方差分析 ,N、P转移率无明显差异 (s=0 .1 3 8)。同时 ,P的转移率与植物成熟叶中的P含量及N/P存在正相关 ,而N的转移率与植物成熟叶子的N含量和N/P不相关。另外 ,常绿植物的N转移率平均值是 3 5 .74% (标准差9.46% ) ,落叶植物N转移率平均值是 3 8.72 % (标准差 1 2 .65 % ) ;常绿植物的P转移率平均值是 3 7.72 % (标准差 1 3 .0 0 % ) ,落叶植物P转移率平均值是 5 5 .3 7% (标准差 1 5 .5 4% )。对落叶和常绿阔叶二种生活型植物进行ANOVA分析 ,表明N转移率无明显差异 ,而P转移率有差异 (P <0 .0 5 )。

A study on leaf nutrient resorption of some trees in Tiantong national forest park

In the present paper,leaf nutrient resorption of 18 trees in Tiantong forest park were studied. The results are as follows:different trees have different leaf nutrient resorption. Average N resorption rate was 37.86%;SD was 10.67%. Average P resorption rate was 44.76%;SD was 15.40%. There are no difference between N and P resorption rate according to analysis of variance. P resorption rate was positive correlated with N/P and P content in maturity leaf,but N resorption rate wasn’t correlated with N/P and N content in maturity leaf. To evergreen trees,average N resortion rate was 35.74%(SD=9.46%),and average P resorption rate was 37.72%(SD=13.00%). As for deciduous, average N and P resorption rate were 38.72%(SD=12.65%)and 55.37%(15.54%)respectively. According to ANOVA analysis,two life forms between evergreen and deciduous have not distinct difference in N resorption rate and have some difference in P resorption rate.