【摘要】 为了确定最佳施肥量和营养诊断指标,文中采用 D—饱和最优设计和诊断施肥综合法(DRIS),对日本落叶松移植苗肥料效应及营养诊断进行了研究。结果表明,日本落叶松移植苗最佳施肥量碛酸铵为675～945 kg/hm~2,过磷酸钙为787.5～1084.5kg/hm~2,硫酸钾为187.5～247.5kg/hm~2。针叶养分适宜比值为 P/N=0.108 1±0.012 4,K/N=0.379 5±0.0787,P/K=0.2637±0.0428。更多还原

【Abstract】 Adopted the diagnosis and recommendation integrated system（DRIS）and guadractic staturating D,this study deals with the fertilizer effect and the nutrition diagnosis of transplanted seedlings of Japanese larch.Its aim was to find the best fertilizer quantity so as to provide the theoretical foundation for production.The result was as follows:the best fertilizer quantity were（NH₄）₂SO₄ 675～945 kg/hm²;Ca（HPO₄）₂ 787.5～1084kg/hm²,and K₂SO₄ 187.5 247.5kg/hm²,the appropriate ratio of P/N was 0.108 1±0.0124,K/N 0.3795 ±0.0787,and P/K=0.263 7±0.0428.更多还原