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为了探索柳枝稷在边际土地规模化种植过程中肥料效应方面的基础数据,在日光温室内开展了沙土盆栽柳枝稷苗期氮磷钾肥料效应试验研究。结果表明,氮磷钾肥对沙土盆栽柳枝稷苗期的叶面积、株高、地上生物量、地下生物量、总生物量均具有明显的促进作用,而且,氮磷钾的单因素肥料效应均达到显著水平(P<0.05);柳枝稷苗期总生物量与氮磷钾之间存在着显著的三元二次回归关系,日光温室沙土盆栽条件下,获得柳枝稷苗期最高生物量所需要的适宜氮磷钾浓度分别为:氮(N)94.01mg/kg,磷(P2O5)40.18mg/kg,钾(K2O)117.96mg/kg。
In order to explore the basic data on the effect of switchgrass on the fertilizer effect in the large-scale planting of marginal land, the effects of nitrogen, phosphorus and potassium fertilizers on sand potted switchgrass seedling stage were studied in sunlight greenhouse. The results showed that nitrogen, phosphorus and potassium fertilizers promoted leaf area, plant height, aboveground biomass, underground biomass and total biomass of sandwitch at seedling stage significantly, and the single factor fertilizer effect of NPK reached significant (P <0.05). There was a significant ternary quadratic regression relationship between the total biomass and the NPK of the switchgrass at the seedling stage. Under the greenhouse conditions, the optimum nitrogen and phosphorus needed for the highest biomass of the switchgrass Potassium concentration was 94.01mg / kg for nitrogen (N), 40.18mg / kg for phosphorus (P2O5) and 117.96mg / kg for potassium (K2O) respectively.