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本文为板栗(Castanea mollissima Blume)黄化机制研究的铁、钙之间关系部分。土壤CaCO_3含量大于2.00％的三个处理,栗株均呈黄化症。黄化株叶和根的全钙量较正常株明显增加,尤其叶钙量是正常株的3—4倍。而叶铁减少,根铁明显增加;施CaCO_3与不施CaCO_3相比较,栗株叶钙、根钙和根铁前者均大于后者,唯有叶铁前者小于后者,又以叶活性铁的降低尤为显著。叶活性铁与叶绿素含量呈显著正相关,叶活性铁减少,影响叶绿素的形成,栗产生黄化。
This article is part of the relationship between iron and calcium studied by Castanea mollissima Blume yellowing mechanism. Soil CaCO_3 content of more than 2.00% of the three treatments, chestnut plants were yellow disease. The total calcium content of leaves and roots of the yellowing plants was significantly higher than that of the normal ones, especially the leaf calcium content was 3-4 times of the normal ones. However, leaf iron reduced and root iron increased obviously. Compared with no CaCO_3 applied, the leaf calcium, root calcium and root iron of the former were higher than the latter, only the former was smaller than the latter, The reduction is especially noticeable. There was a significant positive correlation between active iron content and chlorophyll content, and decreased activity of iron in leaves, which affected the formation of chlorophyll and the production of yellow.