摘要
根据植株外部症状及叶片、土壤分析结果,确诊福建省长泰县岩溪果场椪柑和蕉柑出现的叶片黄化、早期落叶等现象,系硼、铜过量及缺镁综合诱发的植株营养失调。发病植株叶片硼、铜含量明显超过适宜值,分别达110～258ppm和26～41ppm;镁含量偏低,为0.22％～0.31％。初步认为连年喷布(或土施)硼肥和波尔多液,以及土壤酸度过高是导致柑桔植株硼、铜、镁营养失调的直接原因。
According to the symptoms of plants and the results of leaves and soil analyses, the abnormal appearances of Ponkan and Tankan planted at Yanxi fruit farm in Changtai, Fujian province was caused by B and Cu excesses and Mg deficiency. B and Cu levels in the leaf of diseased plants are up to 110-258ppm and 26-41ppm respectively, which are much higher than the suitable range and Mg level of 0.22-0.31％ is lower than the suitable range. It is suggested that the B, Cu and Mg distrubance in citrus plant is caused by frequent application of B fertilizer and Bordeaux mixture as well as by lower soil pH.
出处
《中国柑桔》
1991年第3期6-8,共3页
South China Fruits
关键词
柑桔园
硼
铜
镁
营养失调
诊断
Ponkan
Tankan
Nutrition disorders
Boron
Copper
Magnesium
