通用水溶性肥料配比对矮牵牛穴盘苗营养吸收的影响

Effect of the Ration of Two General Watersoluble Fertilizers on the Nutrient Uptake of Petunia Plug Seedling

以花卉通用的水溶性肥料14-0-14和20-10-20,设计5个配比进行矮牵牛穴盘苗栽培,研究不同配比对幼苗营养吸收的影响。结果表明:植物体内的磷、钾含量随20-10-20用量的增加而增加,随14-0-14用量的增加而减少,氮元素呈相反趋势,且都达到显著水平(P=0.05);在形态和生理指标上,穴盘苗随20-10-20用量的增加,叶片数增多、叶面积增大,较高的20-10-20用量导致光合作用和叶绿素含量降低;同时发现,随20-10-20用量的增加,根系活力减弱,地下部鲜重增加,根系缩短,植株抗逆性减弱。以14-0-14与20-10-20为1∶2配比为矮牵牛穴盘苗的最佳配比。

The plug technique has been introduced for several years,but we have little knowlege about its related fertilizer application. The effect of two general watersoluble fertilizer rations, 20-10-20 and 14-0-14,on petunia plug seedlings nutrient uptake were studied. The result showed, P and K concentration in the plant were increased with the 20-10-20 added, and decreased with the 14-0-14 added. N was in contray trend. The number of the leaf, photosynthetic rate and fresh weight were improved, but the leaf area,the root leugth,chlorophyll and root vitality were decreased. So 1：2 was the best ration.