施磷肥对木犀苗生长的影响

Effect of Phosphorus Fertilization on the Growth of Osmanthus fragrans Seedling

摘要: 研究了7 种施磷肥（P2O5 12%的过磷酸钙）量（0 ~ 0.750 g·盆-1）对1 年生木犀Osmanthus fragrans 苗生长的影响。结果表明：施磷量和木犀苗木的生长、生理指标密切相关；施磷量在0 ~ 0.375 g·盆-1 时，苗高、地径、叶面积、各部位生物量、叶绿素等方面均随施磷量的增加而增加，当施磷量超过0.375 g·盆-1 时，上述指标均呈现下降趋势；木犀苗木的各项指标与磷肥用量之间存在二次函数关系，计算得出1 年生木犀苗木的最佳磷肥施用量为0.28 ~ 0.46 g·盆^-1。

Abstract: The growth of One year-old seedlings of Osmanthus fragrans was affected by seven levels of phosphorus fertilizer treatment. Results ofthe research indicated that:(1) the growth and physiological indexes were closely related to the application amount of phosphorus fertilizer.（2）Theamount of phosphorus was gradually increased among the range of 0-0.375g/ pot, with which the seedling height, the ground diameter, the leaf area,the biomass and the chlorophyll of seedlings were increased accordingly, when the amount of phosphorus used exceeded the 0.375g/ pot, theindicators aboved tended to fall. According to the twice functional relationship between indicators researched and the application quantity，theappropriate amount of phosphorus fertilizer was 0. 28-0. 46g /pot for one year-old Osmanthus fragrans seedling．