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镁是光合作用的主要物质。在柑桔叶片、分生组织和种子中含有大量的镁。柑桔需镁量比其他微量元素大得多。我省柑桔栽培多系酸性土壤,常出现缺镁症状。叶片缺镁时主脉两侧退绿,出现不规则黄斑,继而扩大成片,呈八字形黄化带,严重时引起落叶枯枝,树势衰弱,影响产量和品质。为此,我们对柑桔镁素营养进行诊断,并在严重缺镁症状的永春县吾中果场进行矫正技术研究。现将结果分述于下:
Magnesium is the main material of photosynthesis. In citrus leaves, meristems and seeds contain large amounts of magnesium. Citrus requires much more magnesium than other trace elements. Citrus cultivation in our province more than acid soil, often symptoms of magnesium deficiency. Leaf magnesium on both sides of the main veins back to green, there are irregular macular, and then expand into pieces, was zigzag-shaped yellow band, causing serious deciduous branches, tree weakness, affecting yield and quality. To this end, we have citrus magnesium nutrition diagnosis, and severe magnesium deficiency in Yongchun County, I fruit field correction technology research. The results are now divided below: