In recent years, some farmers have changed their low-lying rice fields to harvest lotus seeds in Putian. Although they have obtained good economic benefits, due to technical factors and other reasons, the output has been declining year by year. Theoretically speaking, each acre of paddy field can produce more than 450 kilograms of shell lotus, but in production only generally produces 75 to 100 kilograms.
In the specific method, when the field is selected, the soil is too shallow or too deep, which is not conducive to high yield of lotus seeds. Such polders are not fertile, which is not conducive to the rapid growth of lotus roots. The flowers are small and small, and the lotus seeds are light and light, and the yield is low. In particular, there is no organic fertilizer, no farmyard manure or green manure, only mixed with superphosphate and ammonium bicarbonate, lacking the necessary potassium fertilizer and trace elements, is also an important factor in reducing production. Therefore, the paddy field should be ploughed twice before planting, and 1000-1500 kg of manure and manure, or 2000~2500 kg of high-quality soil fertilizer, plus 35~50 kg of superphosphate and 5~7.5 kg of potassium chloride. It is required to achieve muddy fertilizer and lay a high-yield foundation.
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