施肥对马尾松人工幼林新鲜针叶及其林地枯枝落叶养分含量的影响

为了探明施肥对马尾松人工幼林新鲜针叶及其林地枯枝落叶养分含量的影响，在桂西北干热河谷地区选择4年生马尾松人工林建立固定样地，采用生物有机无机复混肥不同肥施量进行施肥试验，即A、B、C施肥量分别为1.0、1.5、2.0 kg/株以及CK（不施肥），各3个重复试验。结果表明：（1）各施肥处理新鲜针叶的N、P、K元素含量分别比不施肥(CK)提高3.5%~40.7%，并大致显示出施肥量C＞B＞A的变化规律，其元素含量排序为N(11.710~16.480 g/kg)＞K或Ca(4.362~5.685 g/kg)＞Mg(1.323~1.430 g/kg)＞P(0.690~0.932 g/kg)＞Mn(0.243~0.268 g/kg)＞Fe(0.193~0.247 g/kg)＞Zn(0.016~0.024 g/kg)＞B(0.005~0.009 g/kg)＞Cu(0.003~0.004 g/kg)。（2）各施肥处理林地枯枝落叶的N、P、K元素含量分别比不施肥(CK)提高10.4%~49.9%，其元素含量排序为Ca(10.008~12.942 g/kg)＞N(6.357~7.281 g/kg)＞K或Mg(0.715~1.216 g/kg)＞Mn(0.391~0.740 g/kg)＞P(0.230~0.327 g/kg)＞Fe(0.210~0.253 g/kg)＞Zn(0.023~0.028 g/kg)＞B(0.008~0.012 g/kg)＞Cu(0.002~0.003 g/kg)。（3）马尾松人工幼林新鲜针叶及其林地枯枝落叶养分含量存在密切的相关性，其中新鲜针叶的N、P、K、Mg、Cu养分含量分别比林地枯枝落叶有所提高，而Ca、Zn、Fe、Mn、B养分含量则分别比林地枯枝落叶相应下降。

Effects of Fertilization on the Nutrient Contents of Fresh Conifer and Forest Land Litter Conifer of the Pinus Massoniana Planted Young Forest

In order to verify the effects of fertilization on the nutrient contents of fresh conifer and of the Pinus massoniana planted young forest,set up the fixed sample sites of the 4 years old Pinus massoniana planted young forests,which were located in xerothermic valley area of northwest Guangxi.The author introduced the biological organic-inorganic compound fertilizers with the different usage of fertilizer for fertilizer trial,namely the fertilized of A 、 B 、 C in turn were 1.0 kg/plant,1.5 kg/plant and 2.0 kg/plant also CK （not manured） each of them with 3 repeat the test.The results were as follows：（1） the fresh conifer shoots from fertilization treatment showed higher content of N 、 P 、 K elements over no fertilizer treatment,increased 3.5%-40.7%.The main regularity of fertilized showed C〉B〉A,with the order of elements content were N （11.710-16.480 g/kg）〉K or Ca （4.362-5.685 g/kg） 〉Mg（1.323-1.430 g/kg） 〉P（0.690-0.932 g/kg） 〉Mn（0.243-0.268 g/kg） 〉Fe（0.1930.247 g/kg） 〉Zn（0.016-0.024 g/kg） 〉B（0.005-0.009 g/kg） 〉Cu（0.003-0.004 g/kg）.（2） The forest land litter conifer shoots from fertilization treatment showed higher content of N,P,K elements over no fertilizer treatment,increased 10.4%-49.9%.The main regularity of fertilized showed C〉B〉A,with the order of elements content were Ca（10.008-12.942 g/kg） 〉N（6.357-7.281 g/kg） 〉K or Mg（0.715-1.216 g/kg） 〉Mn （0.391-0.740 g/kg） 〉 P（0.230-0.327 g/kg） 〉 Fe（0.210-0.253 g/kg） 〉 Zn（0.023-0.028 g/kg） 〉 B（0.0080.012 g/kg）〉 Cu（0.002-0.003 g/kg）.（3） The nutrient contents of fresh conifer and forest land litter conifer of the Pinus massoniana planted young forest had a significant difference,of which the increment of contents of N,P,K,Mg,Cu elements of fresh conifer revealed fertilized than not manured improved,but the drop of contents of Ca,Zn,Fe,Mn,B elements of forest land litter conifer.