Fresh lotus root can be supplied in midsummer. Planting techniques of lotus root in arch shed in spring

Fresh lotus root is only listed in winter, but if it is cultivated in a small arch shed in early spring, it can break the routine and supply fresh lotus root in midsummer. To plant lotus root in spring, it is necessary to apply fertilizer scientifically. This paper briefly introduces the planting technology and fertilization technology of lotus root in arch shed in spring.

Planting lotus root in arch shed

Planting techniques of lotus root in arch shed in spring:

First, soil selection. Choose idle low-lying plots or ditches with high groundwater level, long-term dampness or stagnant water, thick silt layer, convenient drainage and irrigation and convenient water collection to plant lotus root.

Second, build shacks and ponds. In early April, a common non-column arch shed was built with bamboo and wood materials. the direction and size of the arch shed were determined by the topography, mostly north-south, convenient for ventilation and lighting, with a length of 20 meters from north to south, 3 meters from east to west and 1.5 meters high. First dig the pit with a depth of 0.4 meters, shovel the bottom, tamp the ground, and lay a layer of polyethylene film 0.10-0.12 mm thick, which should be 0.3-0.5 meters higher than around, to prevent water leakage and fertilizer leakage during the growth period; combined with the application of basic fertilizer for ground preparation, fill the pit, but the fill should be filled according to the soil layer, and at the same time trim the ridges of the surrounding fields in order to accumulate water in the future.

Third, select suitable varieties. Early-maturing varieties with low temperature tolerance, weak light, strong growth potential, high yield and best-selling should be selected as cultivated varieties. According to the experiment, the big white lotus root is good.

Fourth, apply basic fertilizer for land preparation. The policy of "laying nitrogen, increasing phosphorus, replenishing potassium, and catching up with micro-fertilizer in time" should be adopted, combined with filling pond soil, applying 50kg diammonium phosphate, 40kg potassium sulfate compound fertilizer, 750kg-1000 kg mushroom waste or chicken manure per mu. After spreading evenly, turn deeply and rake twice, pour water once 10 days before planting, and then close the shed to raise the temperature.

5. Planting as soon as possible. One month before planting in the open field, it was planted when the temperature was stable (more than 15 ℃). It takes 210 kilograms of lotus root per mu. There are three rows in each small arch shed, and the tips of the lotus roots on the two sides are facing the shed, and the positions of two adjacent plants in the middle row are upside down, so that the stems and leaves are evenly distributed in the shed. When planting, it is appropriate to choose 3-5 consecutive sunny noon, the field water layer to maintain 7-10 cm, not stuffy lotus root tip is appropriate, the back handle should be slightly higher, inclined.

Sixth, pest prevention and control. During the growing period of lotus root, diseases and insect pests are not serious. Aphids and mild brown spot disease will be found in individual shed ponds in early May. Aphids can be controlled with 3000 times of 20% Dasuri EC or 2000 times of 20% mancozeb or 75% chlorothalonil as early as possible, early detection and early control, once every 5-7 days, usually 2-3 times.

Fertilization techniques of lotus root in spring:

The amount of base fertilizer in lotus root field should be determined according to soil fertility. Combined with soil preparation, 2500-3000 kg of rotten farm manure and 60kg-80kg of general compound fertilizer should be applied per mu, and fertilizers such as calcium, boron and zinc should be applied, then ploughed 20 cm deep, ploughed fine and raked flat, and put in 3 cm shallow water.

Reasonable topdressing: the whole lotus root growth period needs topdressing for 2 or 3 times. For the first time, 15 kg of urea or mature farm manure and 7.5 kg of potassium sulfate were applied per mu; the second time, 20 kg of high nitrogen and potassium compound fertilizer was applied per mu; the third time, 15 kg of 20 kg high potassium compound fertilizer was applied per mu, or about 2000 kg of mature human and animal manure was applied.

When fertilizing, choose a clear and windless day, in the early morning or evening, before each fertilization, put shallow water, let the fertilizer dissolve into the water, 2 days after fertilization, then irrigate to the original depth, after topdressing, pour clear water, flush lotus leaves.