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据研究,茶树每生产200公斤新鲜茶叶,需吸收镁1.5～2公斤。土壤缺镁,不仅影响茶叶高产,同时影响茶叶内含物,造成品质下降。 黄叶病茶树缺镁的典型症状,多出现在茶树幼芽、嫩叶大量萌发、生长期。发病先从茶树下部叶片开始,叶尖叶缘退绿发黄,然后向叶片中间与基部扩展,再渐渐扩展到茶树中、上部叶片。 茶树缺镁的主要原因:一是不少茶园处在坡地上,特别是沙性土,土壤中镁随水土大量流失二是茶园长期施含单一
According to the study, every 200 kilograms of fresh tea produced by tea trees needs to absorb 1.5 to 2 kilograms of magnesium. Magnesium deficiency in the soil not only affects the high yield of tea, but also affects the contents of tea, resulting in the decline of quality. Yellow leaf tea typical symptoms of magnesium deficiency, mostly in young shoots of tea, young leaves a large number of germination, growth. The incidence of tea leaf from the beginning of the lower leaves, the tip leaf margin retreat green yellow, and then to the middle of the leaves and base expansion, and then gradually extended to the tea tree, the upper leaves. Magnesium deficiency of tea is the main reason: First, many tea plantations on the slopes, especially the sandy soil, soil with a large number of soil water loss of magnesium is the second long-term application of tea plantations containing a single