Detailed Explanation of Arrowhead Seed Retention Methods and Technical Key Points

Before collecting seeds, a seed retention field must be selected. Choose a high-yielding field plot with pure varieties, robust growth, light pests and diseases, and few bolting and flowering plants for seed retention, and harvest when the aboveground parts have completely withered. After harvesting, select corms that conform to the characteristics of this variety, are relatively large, heavy, and have relatively curved terminal buds as seeds. Curved terminal buds are conducive to nutrient accumulation and are not easy to sprout. The selected seed corms should have their terminal buds broken off, with a small part of the upper corm attached. That is, pour the arrowhead terminal buds into a 600-fold solution of 50% carbendazim and soak for 20-25 minutes, remove and drain off excess water, spread in a thin layer to dry, and then store for winter. For every 100 kg of corms, about 12-15 kg of terminal buds can be broken off, which can be used for planting 1 mu of field.