油松专用包膜肥养分释放及育苗效果研究

利用水浸法和培养基淋溶法对包膜肥的养分释放特征做了初步的研究，表明包膜肥比普通肥料能够延缓肥料的释放时间。通过油松育苗试验，发现2种肥料对苗木在最初1月内的生长影响不显著，普通肥料在初期的养分释放速度比包膜肥释放快，在后2个月的生长期内．施用包膜肥的苗木，其生长情况与施用普通肥料的苗木的生长情况出现显著性差异，而且施用包膜肥的培养基中各营养元素的浓度明显高于施用普通肥料的培养基。

Release Characteristics of Coated Fertilizer Applied in Pinus tabulaeformis and Effect of Cultivated Trees

Both "Dip in water" and "Leaching in culture medium" methods were used to investigate the releasing characteristics of coated fertilizer, the result indicated that coated fertilizer could postpone the release time of fertilizer than ordinary fertilizer. By seedlings trial, coated fertilizer and ordinary fertilizer hadn't notable effect on growth of tree in first month, the nutrient release speed of ordinary fertilizer was quicker than coated fertilizer at initial stage, in the later two month, there were significant differences between the growth of the trees of using coated fertilizer and that of using ordinary fertilizer,the consistency of each nutrient in culture medium of using coated fertilizer was higher than that of using ordinary fertilizer.