What are the different water level standards for the Sham Shui Po and Shallow Ho, how can they be adjusted in production?

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According to the adaptability of lotus root to water level, it can be divided into two ecological types: shallow scorpion and deep scorpion. Shallow buns are suitable for water levels of 10-20 cm and maximum water depths of 30-50 cm. Sham Shui Po is suitable for a water level of 30-50 cm and a maximum water depth of 1-1.2 meters.

The general principle of management of the shallow water layer is: shallow, deep and shallow. After the planting of pods, the buds should be kept in shallow water in order to increase soil temperature and promote germination. Generally, it is better to keep the water layer 4-7 cm deep. With the appearance of the vertical leaves, the growth of the stems and leaves of lotus root gradually becomes prosperous, and the water layer should gradually increase to 12-15 cm. When the terminating leaves appear, it indicates that the scab begins to fall, and the water layer is gradually reduced to 4-7 cm to promote scab. The water level of Sham Shui Po is not easy to adjust. It is mainly to prevent flooding during the flood season. In particular, after the leaves are submerged, they should be drained within 8 hours to expose the lotus leaves to the surface to prevent drowning.

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