营养液中氮磷钾浓度与冬红果叶片矿物质含量的相关性研究

【作者】 郑宝强； 肖建忠； 张涛；

【机构】 河北农业大学；

【摘要】 采用三元二次回归正交设计方法,研究了冬红果无土栽培营养液中氮磷钾浓度对叶片氮磷钾含量的影响,建立了相应的回归方程。结果表明,供氮水平对冬红果叶片中氮磷钾含量影响显著。在供氮水平较低时(≤15．5 mmol／L),能有效地促进氮、磷、钾的吸收,而且磷钾相互促进。在供氮水平较高时(≥22 mmol／L),结果相反。磷水平较低时(≤2．23 mmol／L),能有效地促进氮的吸收,高水平时(≥3 mmol／L),却抑制氮的吸收。磷钾表现为相互促进。更多还原

【Abstract】 By means of orthogonal tyrotational combination design, a three-factor (NPK) substrate cultivation experiment was conducted on N P K content for soilless culture of Malus spectabilis, and the regressive equation was established between N P K content and the application level. The result indicated that N had the most effect on the N P K content in the leaf of Malus spectabilis. With the low application of N, there were significant positive effects on the content of NPK and positive interaction between P and K, but when the application of N was high, the result was reverse. With the low application of P, there were positive effects on the content of N, but reverse when the application was high. P and K always had positive interaction.更多还原