钙元素在果树等植物生长发育中的重要作用
关于钙的一切 - 植物中的钙
All About Calcium - In the Plant
苹果的钙素建议
Calcium Recommendations for Apples
钙质管理对于控制苦痘病至关重要，尤其是对于易感品种。良好的管理应始终以系统为基础，首先是土壤中有足够的钙质供应、树木和根部健康、足够的水将钙质输送到植物中以及适当的作物负荷管理。补充钙质喷雾在果实早期发育期间非常重要。从六月初开始使用效果最佳。以下建议来自华盛顿州立大学作物保护指南。
Calcium management is critical to control bitter pit, especially for susceptible varieties. Good management should always be systems-based starting with adequate supplies in the soil, good tree and root health, sufficient water to move calcium into the plant and appropriate crop load management. Supplemental calcium sprays are important during early fruit development. Start in early June for best effectiveness. The following recommendation comes from the WSU Crop Protection Guide.
钙质（苹果苦痘病）：每季实际钙质建议为 5 至 15 磅，相当于每季每英亩 15 至 50 磅氯化钙。
Calcium (bitterpit of apples): The per season recommendation of actual Ca is 5 to 15 lbs which equals 15 to 50 lbs of calcium chloride per acre per season.
每次施用每英亩 0.5 至 1.3 磅实际钙质（每次施用 2 至 4 磅氯化钙/英亩）。从六月初到八月底施用 6 至 12 次。
0.5 to 1.3 lbs actual calcium per acre per application (2 to 4 lbs calcium chloride/A per application). Make 6 to 12 applications from early June to late August.
建议使用氯化钙形式的钙质，因为它已被证实有效且成本较低。通常，早期喷雾剂是液体钙产品，更容易混合。确保使用的液体和氯化钙用量总计等于每个季节的总量。
Calcium in the form of calcium chloride is recommended because of its proven effectiveness and lower cost. Often early season sprays are liquid calcium products which tank mix easier. Make sure that the liquid and calcium chloride applications you use combined equal the total per season goal.
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