堇叶山梅花营养缺乏症状的研究

Studies on Nutrient Deficiency Symptoms of Philadelphus schrenkii Rupr.

通过石英砂培法,研究了堇叶山梅花幼苗在缺N、P、K、Ca、Mg条件下的缺素症状及生理变化情况。结果表明:在N素缺乏时最先表现出叶边缘有黄色斑点症状;K素缺乏处理15 d表现生长良好,但处理后期40 d左右最先出现缺素焦枯现象,说明该植物前期需钾肥相对较少;缺Ca处理的堇叶山梅花新叶先表现出轻微失绿,有的叶尖干枯且呈螺旋形,其它4种元素亏缺的植株均是老叶先表现症状;N、P、K、Ca、Mg 5种营养元素缺乏的植株叶绿素含量、可溶性蛋白质含量均低于全素(CK)处理,该研究结果可作为堇叶山梅花苗期营养诊断的依据。

Philadelphus schrenkii Rupr.was cultured in N,P,K,Ca and Mg deficient solution.The nutrient deficiency symptoms,and nutrient concentration of plant were studied.The results showed that the lack of N element,the edge of the leaf showed tan spot first;condition that the lack of K element was normal after dealing with fifteen days,but the growth of procreate was influenced,old leaf appeared scorch after forty days,this showed that the plants need less potassium in the initial growth stage of plant;the lack of Ca,the new leaf of the plant showed chlorosis,and the tip of the leaf was dry and curl,the lack of the N,P,K and Mg elements,the underside of the plant showed symptom first;the chlorophyll content and soluble protein content were lower than those of complete nutritional soluble also.The results of this study can serve as an evidence for nutrition diagnosis in Philadelphus schrenkii Rupr.