How should lotus root be topdressed?

Is suitable for growing in hot and rainy seasons. The south of the Yangtze River is mostly planted in early March to April, and the Beijing area is mostly planted in early May. Putian chooses deep soil, rich in organic matter, slightly acidic or nearly neutral clay. For the breeding of tadpoles, select female crickets or fully mature daughters that have the traits of this cultivar, full steamed buns, complete buds, large scorpion body, small sacral joints, thick fat and bright luster. The sowing method should be digging, selecting, planting, or planting after germination. Putian generally maintains 5-6cm shallow water in the early stage to promote germination and leaf extraction, and the water depth is 15-16cm in the middle stage; shallow water is added in the later stage to facilitate crusting.
During the growth process, oxygen in the air is combined with iron in the soil to form a reddish-brown rust spot of ferric oxide, which is attached to the epidermis. When the lotus leaves wither, the respiration of the pupa slows down, and the rust spots gradually decrease due to reduction. Therefore, rust spots are easy to wash off when the leaves are picked before harvesting. The umbilical cord, petiole and underground stem are connected with aeration tissue, so the petiole cannot be broken to avoid water ingress and plant rot.
Lotus root topdressing tips:
The nutrients required for lotus root growth and development are derived from photosynthesis of lotus leaves on the one hand, and from the soil on the other hand, and the original fertilizers in the soil are limited (including basal fertilizer). Although the manure and bait of the fish can provide a certain amount of nutrients for the tadpole, it is very small compared with the growth requirements of the tadpole, so it must be topdressed in time.
The lotus root has a long growth period, usually topdressing 2-3 times. The first time was when the standing leaves began to appear, after weeding and weeding, 750-1000 kg of human manure and urine were applied every 667 square meters. The second fertilizer application was carried out when 5-6 pieces of standing leaves had been applied, and about 1,000 kg of human feces and urine were applied every 667 square meters. The third fertilization is performed when the terminating leaves appear, at which time scabbing begins, which is called topdressing fertilizer. 1,500 kg of manure and urine fertilizer and 30-50 kg of cake fertilizer per 667 square meters.
Fertilization should be carried out in sunny and windless weather, and should be avoided at noon in the hot sun. Discharge the field water before each fertilization so that the fertilizer is absorbed into the water and then irrigated to the original depth. In deep-water paddy fields, fertilizers are easy to lose, and liquid fertilizers cannot be directly applied, and solid fertilizer methods should be adopted. That is, the manure is reapplied and buried in the mud. When using fertilizer for topdressing, first fully mix the fertilizer with the river mud to make a thick mud ball, and then apply it to Putian.

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