1. Cultivation season: The Sagittarius prefers a warm water temperature and is not tolerant of frost and drought. At temperatures above 14°C, Sagittaria began sprouting, drawing leaves from 15 to 16°C. At 23 to 26°C, leaves were drawn at high speed with large blades. The temperature during bulb formation is below 20°C, which is conducive to the formation of large bulbs. Below 14°C, new leaves stopped pumping. When the temperature is below 8°C or when it is frosted, the plants in the ground will die; the bulb formation period of the Sagittarius requires short days and sufficient sunshine to promote the formation of bulbs. According to these biological characteristics of Sagittaria, it is generally cultivated in February in Guangxi, 40 to 50 days at seedling stage, 5 to 6 months of planting, and 7 to 10 months of planting. The suitable period for planting is cold dew to frost, and December to February of the following year. Harvested. 2. Seedling raising: The seed of the Sagittaria has fertility, but when it is propagated with seeds, the bulbous individuals are small and have different shapes. Therefore, in addition to seed breeding using breeding, the production is to use the entire bulb or bulb on the top buds for breeding. Whichever method of breeding is used, mature, hypertrophic, and characteristic bulbous, bulbous, and bulbous stems must be used as seed. The period of insertion of bulbs or apical shoots is generally carried out when the temperature rises above 15°C in February and March. The top bud seedling method is to remove the terminal bud (about 3 or more buds) at the interface between the bulb and the apical bud 1 to 2 days after digging the bulb, and insert it into the nursery field that has been prepared beforehand to raise the seedlings. Reproduction. When inserting the buds, the penultimate section must be inserted into the soil to reach the top bud 2/3, because most of the fibrous roots are in this third section. Insert size 10 cm 10 cm. After the budding buds, the depth of water is kept 2 to 4 cm, and germination takes about 10 to 15 days. The top buds grow into seedlings after rooting. When the seedlings grow 2 to 3 leaves, they are appropriately chased after 1 to 2 times of human fecal urine or chemical fertilizer to promote the growth of the apricots. Seedlings grow continuously during growth. With the increase of temperature and the growth of seedlings, the top buds of the underground stem will develop into many ramets. When the ramets grow 3 to 4 leaves, the seedlings can be transplanted to the field when the height is 26 to 30 cm. The ratio of nursery land to Daejeon is 1:12 to 15, and every 10m2 (1 mu) of nursery field requires about 10kg of terminal buds (70-80kg for bulbs and 340-350 for bulbs per kg). Site preparation for basal fertilization and planting: The cultivated land should be planted in a paddy field with clean water, non-pollution source, convenient irrigation and drainage, and organic-rich clay loam, about 25 cm deep, and 250,000 per 667 square meters (1 acre) of organic fertilizer applied. ~ 3000 kg, potassium chloride 15 ~ 20 kg as basal fertilizer, Fuping, according to plant spacing 40 cm 50 cm colonization. Planting 4,000 to 5,000 plants per 667 square meters (1 acre). When planting, the seedlings will be rooted and excavated. Peripheral leaves are removed and the top bud base is pinched by hand and the roots are inserted into the soil. The depth of colonization is beyond the third quarter, preferably 9-12 cm.
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