Breeding of Freshwater Pearl Seed
Fresh Double Packed Sweet Corn
Jilin Province Agricultural Sister-in-law Food Co., Ltd. was establishe in 2012, is a diversified company based on corn food's research and development, production, and sales. Through several years' rapid development and innovation, Nongsao gradually became a modern company of certain scale.
Jilin Province Agricultural Sister-in-law Food Co., Ltd. is located in Gongzhuling City, Jilin Province, one of the three golden corn belts in the world. The corn belt in Jilin Province is well suited for corn growing conditions, and more than 60% of the arable land is suitable for corn growing, so the total corn production and commercial grain rate in Jilin Province has been the first in China. Jilin Province is the main corn producing region in China and the main grain exporting province of the country.
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Local Sweet Corn,Sweet Corn For Diet,Sweet Maize Cob,Packed Sweet Corn Jilin Province Argricultural Sister-in-law Food Co., Ltd. , https://www.nongsaocorn.com
I. The ecology and living habits of freshwater pearls
(I) Living habits
Pearl tadpoles generally live in sediments in rivers, lakes, ponds, and other bodies of water. The depth of the body's sneak into the mud varies with the seasons. When the water temperature is low in winter, most of the carcasses sneak into the sediment, with the front ventral edge down and the dorsal edge up, only exposing some of the rear edge of the shell to ingest food. Most of Hawaii is exposed outside the sand. Different types of earthworms have different requirements on the environment. For example, a crested crested ibis inhabits a slow or steady stream of silt, and enjoys good water, suitable for a pH of 5-7; Among them, the water quality is relatively clear, and the PH is stable at 7-8.
(B) Intake habits
Cockroaches usually feed on bacteria, phytoplankton, protozoa, rotifers, small horns, small copepods, and organic debris in water. Different types of quail feeding vary. Such as crested cress more than algae feeding. The food intake depends on the amount of feed in the water, the degree of palatability, and the physical condition of the baby.
(III) Reproductive habits
When the water temperature is appropriate, the mature male and female gonads gradually become full and mature. The gonads of female eels are changed from light yellow to orange, indicating that the gonads are mature, the fertilized hole is tightly attached to the egg membrane, and fertilization occurs in the case of sperm. Spinnaker quail eggs 40-50 million / only. Pleurotus plicata 50-7 million grains / only. The gonads of the baboon mature gradually and have multiple ovulation habits. The spinnaker lobulated 5-8 times during the breeding season, and the pleated crown ovulated 2-3 times. Therefore, the hooked larvae can be collected multiple times when the quail is farmed. Old fleas and sick fleas have a low fertility. Although the amount of eggs is high, due to the complex development of metamorphosis, the survival rate of larvae is only about 10%.
(d) Development of embryos and larvae
Fertilized eggs develop hatching in the external iliac crest. After the cleavage period, blastocyst stage, gastrulation stage (closed shell, heart, primordial shell, primitive intestine, hook teeth, bristles, full thread), the clerodendial larvae are formed.
After the hooked larval larvae leave the mother's body, the fish is caught on the larvae with full thread and shell hooks. In the parasitic stage, the fish secrete mucus to form cysts and entrap the larvae. The larvae absorb the nutrients of the fish and develop metamorphosis. The larvae finally breaks down and enter the benthic free-living habitat. Juveniles have the organs of the stomach, the adductor muscles, the intestines, the axe and other organs. Morphologically, it has a cocoon shape, and the full-featured foot hooks and hooks of the hooked larvae have disappeared.
(v) Breeding season
Different species of crickets have different breeding seasons. When the water temperature reaches 18C (in late April and early May), the gonads begin to mature, and they spawn from May to June. They line the larvae. In a good environment, each female quail can spawn and cleave larvae 7-8 times. In low-temperature water bodies, larvae can be delayed until September.
The pleated crown reproduces twice a year. From March to March each year, at a water temperature of 10-20C, fertilized eggs develop into hooked larvae in the larvae and are excreted. The ovulation stopped in June. In the fall, and in early September, the eggs begin to grow again, and the fertilized eggs develop into larvae, which are excreted in the early October-December period. If the environment is suitable, the mother-in-law begins to spawn again after 10 days.
Second, artificial reproduction of freshwater pearls
Unlike other regions, Jilin has a cold-temperate humid and semi-humid climate. The frost-free period is short throughout the year, about 130-170 days, and the annual precipitation reaches 400-800. July-September is the peak period of precipitation, which is more suitable.
