How is it grown? Can you plant black algae in October?

1. Cuttings and propagation at the tips of branches:

The black algae (hydrilla verticillata) is a "pseudo-apical" plant that has only sessile roots. It is in the vegetative growth phase from April to August each year, and after 3 days of planting, the roots can take root to form new plants.

2. Transplanting and propagation of vegetative bodies:

In general, before and after the rains, the pond water is drained, leaving 10 to 15 cm of sediment, 15 cm long and cut into spirulina sections of about 8 cm sprinkled with 30 to 50 kg per acre so that the stem section is partially immersed. In the mud, add pool water to a depth of 15 cm.

After about 20 days, the entire pool is covered with new black algae (hydrilla verticillata), which can be added by 30 cm. After that, the pool water gradually deepens so that the water is not exposed to the surface. At the initial stage of transplantation, the water quality should be kept fresh, no water should be used, and no fertilizer should be used.

3. Planting of bud buds:

From December to March of the following year, it is the sowing date of the black algae buds. It should be planted on a sunny day. Before planting, the pond water should be filled with 10 cm, 500-1000 grams of new water per acre, and the planting should be 50 cm.

Insert 3 to 5 buds into the mud, or mix with sand. When the water temperature rises to 15°C, germination begins in 5 to 10 days and the emergence rate can reach 95 .

Cultivation techniques. 1. Cuttings and propagation at the tips of branches:

Every year from April to August, in the vegetative growth stage, the tips of the branches can take root after 3 days of planting and form new plants.

2. Transplanting and propagation of vegetative bodies:

Leave 10 15 cm of sediment, cut the 15 cm long rotor leaf black algae into a segment of about 8 cm long, so that the stem node is partially immersed in the mud, and then add the pond water to a depth of 15 cm.

3. Planting of bud buds:

Sowing should be selected on a sunny day, before sowing the pool water is filled with 10 cm of new water, and the buds should be inserted into the mud according to the row and plant spacing of 50 cm when sowing, or mixed with mud and sand to spread.

4. Planting of the whole plant.

In May and August of each year, the natural waters of the black algae have grown, up to 40 to 60 cm long, and some of the raw beards survive with mud roots.

Artificial cultivation techniques.

Propagation by cuttings at the tip of the shoot.

Melanophyllum rotifolia belongs to"False root tip"Plants, only whiskered adventitious roots, in April and August every year, in the vegetative growth stage, the tip of the branch can take root after 3 days of cutting, forming a new plant.

Vegetative body transplantation propagation.

Generally, before and after the valley rain, the pond water is drained, leaving 10 15 cm of sediment, cutting the length of 15 cm to 15 cm of the black algae of about 8 cm long, and evenly splashing 30 50 kg per mu, so that the stem node is partially immersed in the mud, and then the pond water is added to 15 cm deep. After about 20 days, the whole pond is covered with new black algae, and the water can be added up to 30 cm, and then the water can be gradually deepened so that the aquatic plants do not come out of the water. At the beginning of transplantation, the water should be kept fresh, not dry, and chemical fertilizers should not be used.

If there is moss, it can be used"Kill moss"Drugs kill.

Planting of buds.

From December to March of the following year is the sowing period of the black algae bud of the rotinal leaf algae, it should be sown on a sunny day, the pool water is filled with 10 cm of new water before sowing, 500 1000 grams of seeds per mu, and the buds should be inserted into the mud according to the row, plant spacing of 50 cm, or mixed with mud and sand to spread. When the water temperature rises to 15, germination begins in 5-10 days, and the emergence rate can reach 95.

Precautions: The selection of bud buds: the bud buds are 1 cm long, cm in diameter, 3500 4000 grains per 500 grams, and the bud buds are hard and full, and they are green onion.

Before sowing, polyethylene mesh or white film fence should be used to separate the bud buds from the river crabs, and when the buds germinate and grow, and the aquatic plants are full of ponds, remove the fence facilities and let the river crabs enter the grass. The number of crabs per mu should be less than 1,000.

Planting of the whole plant.

In May and August of each year, the black algae in the natural waters has grown, up to 40 60 cm, and 100 200 kg of grass is put in the crab pond per mu at a time, some of which are directly fed by crabs, and some of them survive with mud. In terms of water quality management, the water depth during the day and the shallow water at night reduce the amount of grass eaten by river crabs and promote the formation of fibrous roots.

Agriculture.net @ billion farmer's net algae melanophylla cultivation technology.

It is not recommended to plant in October. The planting of this aquatic plant is generally carried out from the end of February to the end of April, generally speaking, the spores are concentrated in the end of February to the beginning of March, and the sprouts are concentrated in the middle of March to the middle of April.

1. Proportion of other aquatic weeds planted.

2. Breeding river crabs.

of delivery density.

Generally, cuttings are used for planting, and before and after the valley rains, the grass will be retrieved or purchased.

Cut into small sections of 6 8cm, evenly sprinkle at the bottom of the pool, and lightly press with a broom to soak part of the stems and leaves in the mud, or take 3 5 plants as a bunch, insert them in the mud, and use 20 25kg of seedlings per 667 Ping's orange square rice on the water surface.

Spore planting method can also be used, sowing from December to March of the following year, pre-filling pond water 10cm, using 500 1000g of grass, sowing according to the row spacing, plant spacing 50cm each 5 spores inserted in the pool, mixed with sediment can also be dispersed.

The water temperature suitable for growth is 10 35 , and March and August are the vigorous growth period, and they sink to the bottom of the water in the state of winter buds for wintering. It is best to control the water level at about 20 cm in the early stage of planting, and as the temperature rises, the black algae will grow rapidly, and then gradually increase the water level. Farmers who have the conditions can use bitter grass.

The planting area is fenced with purse seine nets, and the seine nets are removed in June after the aquatic weeds are abundant, so as to avoid the aquatic weeds being eaten by river crabs during the emergence stage.

The cold tolerance of the black algae is relatively strong, it can be planted in winter, but the water temperature in winter should not be lower than 5 as much as possible, during the day, give the black algae 2 3 hours of light, it is best to give it full sun, and control the water temperature at about 5 with a warming rod, so as to avoid frostbite, so that it can safely survive the winter.

Melanophyllum rotifolia is a perennial submerged herb.

Many people don't know whether the black algae can survive the winter, its cold resistance is relatively strong, and it can survive the winter under normal circumstances, as long as the temperature is not lower than 5, it is difficult to frostbite and freeze to death.

The relevance is as follows. When the black algae is cultivated in winter, it needs to be placed in the sun during the day, at least 2 3 hours of light is given to it, and it is best to give it full sun exposure, which is helpful to the black algae in the cold and can avoid frostbite in winter.

If the temperature is lower than 5, especially at night, you can place a warming rod in the water to control the temperature above 5, so that the black algae can safely survive the winter.

In fact, in the process of cultivating black algae in winter, you can also use shallow water to cultivate black algae, and drop a few drops of nutrient solution into the water in an appropriate amount.

You can also breed a small amount of crabs to prevent shallow water from freezing, which is helpful for the black algae of the rothal leaf to keep out the cold.