日本落叶松容器苗不同控释肥生长效应

以落叶松网袋容器播种苗为对象,施用不同配方控释肥,进行落叶松苗期生长量、生物量、根冠比、叶绿素含量的测定,采用模糊数学隶属值计算方法选出适合日本落叶松育苗的专用配方控释肥。结果表明:按播种后天数,日本落叶松苗期生长阶段为:出苗期(7 39 d),生长初期(40 54 d),速生期(55 114 d)及生长后期(115 135d);不同配方控释肥对落叶松苗高、地径、单株生物量、地上生物量、地下生物量及叶绿素含量的影响差异极显著,而不同配方控释肥间根冠比差异不显著。控释肥配方2综合效果优于其他配方控释肥及从美国进口控释肥爱贝施,可以作为日本落叶松育苗专用肥。

Effect of Controlled Release Fertilizers on Net Container Seedlings Growth of Larix kaempferi

One-year-old larch seedlings cultivated in net container were treated with different formulations of controlled release fertilizers aiming at selecting suitable formulation among those controlled release fertilizers by Fuzzy Mathematic method based on the growth, biomass and chlorophyll content of the treated seedlings. The results indicated that the growth of Larix spp. seedlings treated with different formulations fertilizer after the seeds sowed could be divided into four stages which were the germination stage(7-39 d), initial growing stage (40-54 d), fast-growing stage(55-114 d) and the late growing stage(115-135 d). It was found that different controlled release fertilizer formulations had extremely significant effects on the height, basal diameter, individual biomass, aboveground biomass, underground biomass and chlorophyll content of the seedlings, while there were no significant differences on the ratio of root to shoot of the seedlings treated with those fertilizers. The formulations 2 displayed much better effects on larch seedlings than that of the other formulations and the Apex imported from America and it could be used for larch seedlings nurturing.