盆栽牡丹叶片营养和基质速效养分动态变化分析

Analysis on Dynamic Changes of Leaf Nutrition and Substrate Available Nutrient of Potted Peony

选择10年生牡丹品种洛阳红,分析了基质盆栽牡丹叶片养分与基质速效养分含量之间的动态变化规律,以及不同时期两者之间的相关关系,结果表明:叶片中含磷量与含钾量总体上都呈下降趋势,基质中的速效磷、速效钾含量开始呈下降趋势,但到一定阶段后出现上升,花芽分化期之后又下降;开花期、花芽分化期基质速效磷含量与落叶期叶片含磷量呈显著负相关,开花期基质速效钾含量与花芽分化期叶片含钾量呈显著正相关,其他时期不显著,因此,应在花前期施磷肥,开花期追施钾肥。

Selecting 10-year-old peony variety ＂Luoyanghong＂ as experimental material,the dynamic changes of leaf nutrition and substrate available nutrient of the potted peony were studied,and the relationship between them in different periods was analyzed.The results indicated that the content of phosphorus and potassium in the leaves had decreased as a whole.The content of available phosphorus and available potassium in the substrate appeared the decreasing tendency at first,but it increased at certain special stage,and then it decreased again after blossom bud differentiation.There was significant negative correlation between the available phosphorus content in the substrate at flowering and blossom bud differentiation stages and the phosphorus content in the leaves at leaf fall stage.A significant positive correlation was found between the available potassium content in the substrate at flowering stage and the potassium content in the leaves at blossom bud differentiation stage.So it was better to apply phosphorus fertilizer before flowering and potassium fertilizer in flowering period.