石灰质土壤上不同葡萄品种叶片的铁含量与其黄化的关系

以石灰性土壤上8年生的3个欧亚种鲜食葡萄品种(红脸无核Blush Seedless、玫瑰香MuscatHamburg、里扎马特Rizamat) 以及3个欧美杂种(京亚J ingya、藤稔Fujiminori、紫珍香Zizhenxiang) 为试材, 通过对叶片叶绿素、活性铁和全铁含量相互关系的分析发现, 不同品种新叶到成熟叶的叶绿素、活性铁和全铁含量逐渐增加; 黄化叶片叶绿素比绿叶显著降低, 重度黄化欧美杂种1、2位叶活性铁含量显著低于未黄化欧亚种; 不同品种1、2位叶全铁含量比较, 黄化叶与绿叶差别不大, 有时黄化叶比绿叶全铁含量高; 欧亚种红脸无核和玫瑰香4位叶全铁含量显著高于黄化品种4位叶。叶片叶绿素含量与其黄化程度呈负相关, 与活性铁和全铁含量呈正相关。

Studies on Chlorosis and Iron Contents of Leaves from Different Grapevine Cultivars on Calcareous Soil

The study was carried out with table grapevine plants grown on calcareous soil under field conditions. Chlorophyll concentration, active iron contents and total iron contents of leaves from different positions of 8-year-old table grapevine (three Vitis vinifera, Blush Seedless, Muscat Hamburg and Rizamat; three Euro-American hybrid, Jingya, Fujiminori and Zizhenxiang) were measured and analyzed their relationship. The results indicated that contents of chlorophyll, active and total iron gradually increased from young leaves to muture leaves. The contents of chlorophyll of chlorotic leaves were significantly lower than that of green ones.The active iron content of leaves at first and second position of severely chlorotic Euro-American hybrid was remarkably lower than that of normal Vitis vinifera. Chlorotic leaves have same or higher iron concentration than green ones when compared with the total iron content of leaves at first and second position of different cultivars,while the total iron content of leaves at forth position of Blush Seedless and Muscat Hamburg were significantly higher than ones of chlorotic cultivars.Chlorophyll content was negatively correlated to degree of chlorosis,the active and total iron contents were significant positively correlated to chlorophyll content.