As the saying goes, “crabs grow their grass first”, “crab size looks at watergrass”, etc., see the importance of watergrass in river crab farming. Not only does it benefit crab shells, but it also acts as a shade of sun and cooling during high temperatures, but it also serves to purify water quality and enhance dissolved oxygen. The good cultivation and maintenance of grass in crab ponds are key to the success of crab breeding. As temperatures continue to rise, so do weeds. How can the waterweeds in the pond be conserved? The first line of the interview was summarized as follows:
1. Removal of grass
Watercrackers are the most common phenomenon in the medium term, where suspended impurities, dead algae, etc., are adhesive to the grass, consuming the surface light of the grass, thus affecting the co-optation of light, causing the grass to survive, corrosively decomposition and, in serious cases, leading to total death。
We can use the black classic + 120 to solve the problem of lasagna. In the later stages of farming, the use of lactated fermentation fluids is used to achieve water diversion, which makes water more fluid and stimulates the vitality of water and grass。
2. Pests
The temperature rises and everything resuscitates, and may is the season of a watergrass infestation, with red and white nematodes of algae and beryllium, resulting in the loss of all the leaves and the luminous shape of the grass。
In response, it is recommended that weeds be fertilized in small quantities (strengths) before the high infestation season to enhance their resistance to insects. Insecticidal products can be used to kill if pests have appeared to avoid shellage periods。
Prevention of weeds
In mid-may to july of each year, crabs were found in many ponds, with grass and rooting, resulting in late grasslessness and affecting the crab shells. There are four main reasons:
We don't have enough bait to cause crabs and grass
In recent years, the pursuit of high-density and high-yield farming patterns, combined with the introduction of lobsters, which are more abundant in ponds, and poor control of delivery, have led to hungerous grasses for crabs, thus increasing the number of baits delivered and focusing on detection and timely adjustment of feeding。
2 vitamin deficiency and mineral-induced weeds
Treatment: use of “full-effect quick fix” blends to reduce weed phenomena by effectively supplementing mineral elements。
Three stress causes weeds
Stress weeds due to weather mutation can be spilled in vitoto, boost immunity and resist stress。
Four oxygen shortages cause weeds
Treatment: de minimisation (under three effects), reduction of water body toxins and addition of bottom dissolved oxygen。
4. Rashing and mowing grass
Ilga algae grow at temperatures above 5°c, 10°c begins to grow, with 18-22°c growing the most. In may, the elysian grass grew most strongly, with thin water, too much transparency, too much light cooperation and low water levels during the previous period, leading to a thin length of the elysian leaf. During this period, management has been strengthened to control planting density and the root causes have been regularly used to promote growth after planting。
When weeds are too strong, weed-cutting measures should be taken in a timely manner to increase ventilation, increase the flow of water bodies, increase the aerobics of water bodies, accelerate the growth of the water's root systems, and when weeds are pulled, weeds should be pulled out in a timely manner in order to promote the growth of the roots of the water, the growth of the body and the elimination of the phenomena of dead grass, decay, etc。
5. Ile algae are too dense, rotten roots, flowers
Over a long period of approximately three months, the ilga have become too strong and dense, blocking the flow of water, especially when the water grass has surfaced, exposed to the sun and stopped growing, and after a period of time the leaves have yellow hair, the roots have rotted, the water has floated, the water has deteriorated, and the water has become red and dark。
At this stage, ageing water grasses need to be beaten with grass in a timely manner, over-crystals need to be removed in a timely manner, and dense grasses need to be removed, increasing the mobility of water bodies and preventing monolithic grasses from becoming too large. In the event of yellow roots, black roots and decomposition, the bottoms should be improved first by using the “bottom three effects” and then the “breeding root” should be used to restore the grass, promote root and strengthen the root。
Weed conservation in river crab farming is the key, and weed conservation is a long process, focusing on preventive measures, maintaining good water quality, day-to-day management and escorting the upcoming hot season
Original statement
This is a scientific fish magazine. Social
