钙是葡萄生长发育必需的大量矿质营养元素。葡萄对其需求量超过磷元素的需求量。葡萄早期缺钙一般无明显症状,中期以后缺钙在葡萄地上部与地下部都有表现。如引起根部生长不良,嫩叶变色及死亡,果实生长也受到影响。1　葡萄缺钙症状　钙是组成细胞壁、胞间层的重要元素,老组织中 Calcium is a large number of mineral nutrients necessary for grape growth and development. Grape demand for more than phosphorus demand. Grape early calcium deficiency generally no obvious symptoms, mid-term calcium deficiency in the upper part of the vine and underground parts have performance. Such as causing poor growth of roots, young leaves discoloration and death, fruit growth is also affected. 1 Grape calcium deficiency symptoms Calcium is composed of cell wall, an important element in the intercellular layer, the old organization