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1.1966年到1968年对日本产茶地茶树的异常症状与茶园土壤的地质、母质和化学转性以及茶叶的无机成分含量的关系进行调查。(1)日本茶树异常症状有网纹状黄化叶、黄化斑叶、立枯症状(根腐病)和萎黄病等类型。在这些异常症状中网纹状黄化叶、黄化斑叶和立枯症状的发生与各产地土壤的地质和母质无关。但是只有萎黄病发生在佐贺县嬉野地区。(Ureshino) (2)网纹状黄化叶、黄化斑叶和萎黄病的症状,一般发生在强酸性和盐基不平衡的土壤,但是只有立枯症状是发生在中性或弱碱性土壤。在网纹状黄化叶的叶片中锰和铝的含量和Mn/F。比率都比正常叶高。遭受黄化斑叶的叶片中锌的含量比正常叶少,但是相反地铝的含量比较高。2.用盆栽法研究茶树对微量元素缺乏和过度吸收时所表现缺乏和毒害的症状。(1)茶树对铁和铝缺乏和毒害的症状,不易获得。但是对锰、硼和镍过度吸收表现的毒害症状和特征是明显的。(2)用水耕法培养研究放射性同位素锰(“Mn)在茶叶和树干中的积累。就培养液酸碱度来说,以PHS时在叶片中积累量为最高,PH3一4比较高,在PH6一7时显著降低。可是在根部的积累是随着PH值增高而增加,尤其在PH7时为最高。(3)用盆栽法研究茶树对锰的吸收表明:低水平的有效锰对茶树生长有良好的影响。而用电子显微镜X一射线分析发现,锰的显著积累时在茶叶上发生深褐色斑点。
1. From 1966 to 1968, the author investigated the relationship between the abnormal symptoms of tea tree in tea plantation in Japan and the geology, parent material and chemical conversion of tea plantation soil and the inorganic content of tea. (1) Abnormal symptoms of Japanese tea tree are yellow-eyed leaves, yellowish yellow leaves, symptoms of rash (root rot), and chlorosis. In these abnormal symptoms, the occurrence of yellow-eyed leaf, yellowish leaf spot and withered stem has nothing to do with the geology and parent material of soil in each producing place. But only chlorotic disease occurs in the Ureshino region in Saga Prefecture. (Ureshino) (2) Symptoms of reticulocytic, yellowish, and chlorotic yellows usually occur in strongly acidic and basal-imbalanced soils, but only the symptoms of dwarfing occur in neutral or weakly alkaline soil. Manganese and aluminum content and Mn / F in leaf of reticulatae. Rates are higher than normal leaves. The zinc content in the leaves of yellowish-leafed leaves is less than that of normal leaves, but on the contrary, the content of aluminum is relatively high. Potted method was used to study the symptoms of lack and toxicity of tea tree in the absence and over-absorption of trace elements. (1) Tea tree is deficient in iron deficiency and poisoning symptoms of aluminum and is not readily available. However, toxic symptoms and signs of over-absorption of manganese, boron and nickel are evident. (2) The hydroponics culture was used to study the accumulation of manganese (“Mn”) in tea and tree trunk.As far as pH of culture medium was concerned, the accumulation of PHS was the highest in leaves, PH3-4 was higher, 7, but accumulation in the root increased with increasing PH value, especially at pH 7. (3) Potted cultivation study on the absorption of manganese by tea plant showed that the low level of available manganese had a good growth on the tea plant The results of electron microscopy X-ray analysis found that the significant accumulation of manganese dark brown spots on the tea.