氮素添加对赤皮青冈大规格容器苗生长量的影响

Effects of Different Nitrogen Additions on the Growth of Container Seedlings of Cyclobalanopsis gilva

为指导培育市场急需的赤皮青冈容器大苗,以2a生赤皮青冈为研究对象,设置4个不同氮素水平(每株施氮CK 0 g,A_(1)0.1449 g,A_(2)0.2838 g,A_(3)0.4257g),研究不同氮素添加量对赤皮青冈容器苗木生长量的影响。结果表明:苗高、地径、叶总数、叶片长度与宽度以及地上与地下生物量,都表现为随着氮素添加量的增加先增加后减小趋势;A_(2)处理对苗高、单株叶片数以及叶片、茎、根系生物量最有利,A_(1)处对地径以及叶片长度与宽度最有利。按照本研究采用的营养土来源和配比,利用2 a生幼苗培育赤皮青冈容器大苗时,建议每株施氮0.2838 g或0.1449 g。

In order to investigate the effects of nitrogen additions on the growth of container seedlings of Cyclobalanopsis gilva,taking two-years-old Cyclobalanopsis gilva as the research object,4 levels of nitrogen fertilizer were applied including(A_(1)0 g,A_(2)0.1996 g,A_(3)0.3992 g,A_(4)0.7984 g).The results showed a trend of increase of height,ground diameter,number of leaves,length and width of leaf,and biomass above and underground,with the increasing level of nitrogen fertilizer application.Treatment A_(2) had most favorite effect on seedling height,number of leaves of individual plant,and biomass of leaves,stem,roots.Treatment A_(1) had most favorite effect on ground diameter,leaf length and width.So nitrogen application at 0.2838 g per plant or 0.1449g per plant is highly recommended for 2 a container seedlings of Cyclobalanopsis gilva.