Disorder of undersupply of Ca Appe: bitter pit苦痘病, cork spot木 栓病, watercore水心病 Tomato, water melon potato and pepper: blossom- end ro蒂腐病 Celery: blackheart黑心病 ■ Carrot: cavity spot空洞病 Cherry;: firmness and cracking硬化 与开裂病
Disorder of undersupply of Ca ◼ Apple: bitter pit苦痘病, cork spot木 栓病, watercore水心病 ◼ Tomato, water melon potato and pepper: blossom-end rot蒂腐病 ◼ Celery: blackheart黑心病 ◼ Carrot: cavity spot空洞病 ◼ Cherry: firmness and cracking硬化 与开裂病
Contributors to Ca deficiency Oversupply N K, NHat and Mg+ compete in uptake B deficiency Excessive pruning修剪 Large fruits Weather factors: humidity drought Soil factors water logged soil, high salt concentration poor aeration low temperature
Contributors to Ca deficiency ◼ Oversupply N ◼ K, NH4 + and Mg2+ compete in uptake ◼ B deficiency ◼ Excessive pruning 修剪 ◼ Large fruits ◼ Weather factors: humidity, drought, ◼ Soil factors: ◼ water logged soil, ◼ high salt concentration ◼ poor aeration ◼ low temperature
140. Cork spot on a Delicious apple. ( Courtesy G M. 139. Internal symptoms of cork spot on York Imperial Greene apples. (Courtesy G M. Greene)
Watercore
Ca DEFICIENCY IN TOMATO Upward cupping of leaves, marginal necrosis and terminal tissue in calcium-deficient tomato plant