不同氮磷钾配比缓释肥对华北落叶松容器苗生长的影响  

Effects of slow-release fertilizer with different ratio of N,P and K on growth of containerized Larix principis-rupprechtii seedlings

作　　者：奚旺[1] 刘勇[1] 马履一[1] 李国雷[1] 贾忠奎[1] 蒋乐[1] 陈闯[1] 史文辉[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《中南林业科技大学学报》2014年第5期26-30,共5页Journal of Central South University of Forestry & Technology

基　　金：国家林业公益性行业科研专项经费项目(201004021)

摘　　要：以华北落叶松播种容器苗为研究对象，在总施氮量相同的条件下，设4个施肥配比处理，通过比较苗木形态指标及矿质元素含量的差异，研究不同施肥方式、施肥配比对华北落叶松容器苗生长的影响。结果表明：苗木生物量及氮含量随着磷、钾肥比例的增加而呈增加趋势；缓释肥氮磷钾配比为13∶13∶13、释放期为150～180 d、施氮量为100 mg/株为华北落叶松当年生容器苗最佳施肥处理，此处理下苗木生物量和氮含量达到最大，分别为0.54 g/株、13.79 mg/株，平均苗高为13.0 cm、地径为2.7 mm，较国家行业标准LY1000-91中规定的1年生华北落叶松容器苗的苗高、地径分别增加30.3%、33%，苗木合格率为95%，比国标规定的要求增加5%。An experiment was conducted to study the effects of slow-release fertilizer with different ratio of N, P and K on growth of containerized Larix principis-rupprechtii seedlings. The shoot height, root collar diameter, biomass, concentrations and contents of N, P and K of containerized Larix principis-rupprechtii seedlings were measured as the indicators. The results show that the biomass and N content increased with the increasing proportion of P and K;while the fertilization treatment Ⅲwas the best treatment （N︰P︰K=13︰13︰13, the release period was 150~180 days, 100 mg of nitrogen per plant）;with the optimum fertilization treatment, the seedling biomass and N content reached the maximum values, being 0.54 g per plant and 13.79 mg per plant, respectively;the average seedling height, root collar diameter and qualified rate of seedlings reached 13.0 cm, 2.7 mm and 95%, respectively, which increased by 30.3%, 33%and 5%compared to the National Seedling Standard.

关 键 词：华北落叶松 容器苗 缓释肥 氮磷钾配比 苗木质量 

分 类 号：S753.532[农业科学—森林经理学]