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Before applying the base fertilizer, 1,000 kg of compost organic fertilizer and 45% of compound fertilizer 30-50 kg per mu are planted. Plough depth 20 cm, after the smooth leveling, release water, depth of 3 to 4 cm.
Precise colonization of early water Sagittaria planting at the end of June to early July, plant spacing 40 cm, spacing 50 cm, planting about 3300 per acre. The late water arrowhead planted from the end of July to early August, with a spacing of 35 centimeters and a row spacing of 40 centimeters. About 4,700 plants were planted per acre. Before the planting, the seedlings were uprooted, 3 new leaves were kept, and the leaves of the old leaves were removed, leaving only 25 to 30 cm of petioles. Put the roots of the seedlings into the mud, and the depth is suitable for smooth seedlings, after which the surrounding mud shall be smoothed out.
When the water layer is managed, the field will maintain 2 to 3 cm of water in the field, 3 to 6 cm of water after the living tree, deepen the water layer in the hot season, and usually have a water depth of 10 to 20 cm.
When Sagittarius is colonized, pay attention to the following points.