Fertilization skills and matters needing attention in lotus root field

Friends who have planted lotus root all know that lotus root needs fertilizer and water to cultivate. As the saying goes, there must be fertile soil under fertilizer and water. The growth process of lotus root will consume a lot of nutrients in the soil, resulting in less and less nutrients in the soil. Gradually can not meet the growth needs of lotus root, so now people who grow lotus root pay attention to raising some fish and shrimp in lotus root ponds, which can not only improve economic benefits. The feces and residual bait of fish and shrimp can also provide some nutrients for the growth of lotus root, but the nutrition they can provide is also limited, so the culture of lotus root also pays attention to certain topdressing skills. Today, the pro-agricultural network will introduce to you the fertilization skills of lotus root and the matters needing attention in lotus root field fertilization.

The amount of fertilizer applied to lotus root is determined by the fat and thin of the soil itself. usually, a mu of lotus root field needs 15002500kg of human, animal manure or barnyard manure, and 30003500kg if green manure is used. The application of barnyard manure can effectively reduce the rust spots attached to the lotus root and improve the quality of the lotus root. In the deep-water lotus root field, it is easy to lack phosphorus, so in addition to the above-mentioned organic fertilizer, it is necessary to supplement 30-40 kg of calcium phosphate as base fertilizer. Let's take a specific look at the matters related to fertilization in the lotus root field.

I. the time of fertilization in lotus root field

During the growth and development of lotus root, the lotus root is usually fertilized for 2 or 3 times:

For the first time, when the standing leaves began to appear, after ploughing and weeding, 750-1000 kg of human manure and urine fertilizer was applied per mu.

The second topdressing was carried out when there were 5 to 6 standing leaves, and about 1000 kg of human manure and urine fertilizer was applied per mu.

The third topdressing is carried out when the termination leaves appear, when the lotus root begins, which is called topdressing lotus root fertilizer. 1500 kg of manure and urine fertilizer and 30kg of cake fertilizer are applied per mu.

II. Matters needing attention in fertilization in lotus root field

1. Fertilization should choose sunny, windless and airless, and avoid being carried out at noon in the hot sun.

two。 Release the water before each fertilization so that the fertilizer can be sucked into the water and then irrigated at the original depth.

3. In deep water lotus root field, fertilizer is easy to be lost, liquefied fertilizer can not be applied directly, solid fertilizer should be applied. That is, re-apply stable manure or grass green manure, and bury it in the mud.

4. When topdressing with chemical fertilizer, first of all, the chemical fertilizer and river mud are fully mixed to form a mass of fertilizer, and then applied to the lotus root field.

3. Occurrence and control of diseases of continuous cropping lotus root

1. Etiology and symptoms

After stubble in shallow water for about 5 years, due to the poor air permeability of soil, trace elements such as copper, iron and zinc are difficult to meet the growth needs of lotus root, less organic fertilizer and more nitrogen fertilizer can easily induce physiological diseases.

The physiological disease began in the first and middle of May, and the peak of the disease was in the peak season from July to August. At the beginning of the disease, the new leaves wilted slightly as soon as they came out of the water, the veins of the leaves gradually lost green and became light, and the edges of the leaves were brown spots, and gradually expanded to the whole leaf to die.

two。 Prevention and cure method

The continuous cropping lotus root field has been ploughed for 3 or 4 years, which is the fundamental way to control the disease of continuous cropping lotus root. In the process of daily fertilization, organic fertilizer should be given priority to, and the amount of nitrogen fertilizer should be controlled. at the same time, when the water body of lotus root field is relatively thin every spring, copper sulfate 1: 1.5 kg, ferrous sulfate 2: 2.5 kg and calcium magnesium phosphate 25 kg / mu are used to spread hedgerow.

The above is the pro-agricultural network to introduce to you about the lotus root field fertilization skills and lotus root field fertilization points for attention, I hope you can be helpful after reading it. Lotus root is rich in nutritional value, in addition to the rhizome for us to eat, the rest of it can also be used as medicine.