锐齿栎林非同化器官营养元素含量的分布

锐齿栎林非同化器官营养元素含量的大小为，N：皮＞枝＞根＞边材＞心材，P：根＞枝＞皮＞边材＞心材，K：枝＞皮＞根＞边材＞心材，Ca：皮＞枝＞根＞心材＞边材，Mg：根＞皮＞枝＞边材＞心材。不同枝径和冠层枝营养元素含量存在一定差异。干皮及干木质部营养元素含量与盘高度呈显著的正相关或正相关，随圆盘由基部到稍部高度的增加均呈增加的趋势。干营养元素含量为干皮＞边材＞心材，三者呈极显蓍的正相关或显著的正相关。随林木根径和根系在运动场支中的增加，极系营养元素含量均呈了低的趋势。69年生个体生物量和营养元素积累量分别为1235.782和14.4977kg，其中N、P、K、Ca、Mg的积累量分别占营养元素积累量的20.2%、8.5%、20.4%、53.0%和2.9%；根、干、皮、枝和叶的生物量分别占生物总量的17.05%、49.59%、9.18%、24.30%和0.86%，营养元素积累量分别占总量的14.93%、22.65%、21.19%、36.97%、4.25％。

Nutrient distribution for non-photosynthetic organs in the sharptooth oak stands

The nutrient percentage contents for non photosynthetic organs in the sharptooth oak stands are in the following order. N is: barks>branches>roots>sapwood>heartwood, P is: roots>branches>barks>sapwood>heartwood, K is: branches>barks>roots>sapwood >heartwood, Ca is: barks>branches>roots>heartwood>sapwood, Mg is: roots> barks>branches >sapwood>heartwood. The nutrient percentage contents of branches and roots decrease with increase in branch and root diameter,and have difference in different crown layers and ...