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山东棕壤茶园幼龄茶树叶片黄化病因诊断与防治研究
引用本文:姚元涛,刘谦,张丽霞,王日为.山东棕壤茶园幼龄茶树叶片黄化病因诊断与防治研究[J].植物营养与肥料学报,2009,15(1):219-224.
作者姓名:姚元涛  刘谦  张丽霞  王日为
作者单位:1.山东农业大学园艺科学与工程学院,山东泰安,271018;
基金项目:山东省教育厅重点项目,山东农业大学博士科研基金 
摘    要:在山东pH偏高(>6.5)的棕壤幼龄茶园中,茶树容易发生失绿黄化病症,严重影响了新建茶园的成园速度。为了探明该病害的发生原因,分析了茶园土壤pH、有机质、养分状况和不同病害程度叶片中与叶色有关的6种无机元素含量,并对患病植株进行了叶面喷施N、Mg、Fe、Mn、Cu和Zn肥的防治效果研究。结果表明,土壤中有效N含量低是导致茶树下部成叶黄化的原因,喷施尿素能使下部成叶快速转绿,但并不能使上部新梢转绿。新梢黄化叶中Mn、Cu元素含量显著低于茶树叶片正常范围的低限值,是导致其叶片黄化的原因;叶面喷施含Mn、Cu元素的肥料能有效防治幼龄茶树新梢的黄化。导致茶树Mn、Cu缺乏的机理还有待进一步研究。

关 键 词:茶树    营养生理    叶片黄化    病因诊断
收稿时间:2007-10-9

Diagnosis and prevention of tea leaf etiolation of young trees planted in brown soil of Shandong Province
YAO Yuan-tao,LIU Qian,ZHANG Li-xia,WANG Ri-wei.Diagnosis and prevention of tea leaf etiolation of young trees planted in brown soil of Shandong Province[J].Plant Nutrition and Fertilizer Science,2009,15(1):219-224.
Authors:YAO Yuan-tao  LIU Qian  ZHANG Li-xia  WANG Ri-wei
Institution:1.College of Horticulture Science and Engineering,Shandong Agricultural University,Taian 271018,China;
2 College of Chemistry and Science of Material,Shandong Agricultural University,Taian 271018,China;
Abstract:The physiological disease, leaf etiolation, can easily occur in young tea trees planted in brown soil with higher pH value (>6.5) in Shandong province. All leaves of some trees turned yellow, some leaves of new shoots turned white to a certain extent or had some brown spots on the yellow leaf margin. The tea trees with this disease grew weak, which restricted the tea garden to be formed. In order to identify the pathogen of this disease, the pH, organic matter content and nutritional conditions of the soil and six mineral elements related to leaf color in diseased tea leaves were analyzed, and the fertilizers including N, Mg, Fe, Mn, Cu and Zn were spraying on the diseased tea leaves to test the effect of cure the disease. The results indicated that the etiolation cause of the substrate mature leaf was the deficiency of available nitrogen in the soil. Spraying urea on the yellow leaves can turn the color of substrate mature leaf to green, but it does not have such effect on new shoots. The etiolation cause of new shoots was the deficiency of manganese and cuprum contents, and spraying microelements of manganese and cuprum on the new shoots can prevent and cure this disease. The mechanism of manganese and cuprum deficiencies need to be further investigated.
Keywords:tea plant  nutrition physiology  leaf etiolation  diagnosis of pathogen
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