Breeding of Astragalus membranaceus is a new industry that has emerged in recent years. Market prices have been promising, domestic and international demand is large, and a number of places have set off an upsurge of farming. However, most of them are collecting wild seedlings for short-term rearing because the source of wild seedlings is complicated. Among them, the healthy, infected, wounded, and poison catchers are mixed together. The survival rate of such astragalus species is extremely low, the mortality rate is as high as 80%, and even the entire army is destroyed, causing serious economic losses!
Some experienced farmers evaded the breeding season of the yellow cricket and started to purchase local cages and net plovers for breeding after July of each year. The mortality rate of these jaundice is low and the benefits are considerable. Farmers with better farming conditions and certain experience can obtain more than 20 net profit per kilogram. In Hubei, Hunan, Anhui, and Jiangsu provinces of our country, the advantages of abundant local lakes and rich wild resources have resulted in the acquisition of a large number of caged or net-fished aquaculture, and have a considerable scale. Net profit of 50-60 million. Driven by such lucrative profits, everyone has moved on blindly, and blindly increased the aquaculture area. Even farmers with little experience have invested large sums of money in the acquisition of the Huanghua Farm. In the area along the Honghu Lake in Hubei Province, a large area of ​​acreage has been developed. Large-scale breeding requires a large amount of wild resources. Due to excessive seizures and flooding, wild resources have been declining, and farmers have increased. There are often phenomena of panic buying and price-raising. There has also been a purchase price of 40 yuan per kilogram. Breeding on the scale, it is difficult to buy Huang Xi! How can we do without resources? At this moment of tension, some farmers went for acquisitions a few hundred kilometers away. In this way, due to the transportation distance is too far away or the transportation method is improper, Huang Shuo has died in large quantities in a short period of time, with very low efficiency or serious losses! “Being scarce and expensiveâ€, by the end of the year, everyone wanted to sell a good price, and they rushed to the market. When a large number of jaundice entered the market, the market could not digest it quickly, diluting the market price and becoming a high buyer. Contrast to the low price of selling, most farmers lost money, seriously affecting the economic efficiency of farmers and the enthusiasm of raising alive!
In 1995, the author began to study the breeding and breeding of the radix scutellaria and obtained good economic benefits in the short term, and published technical articles on training jaundice and trained many students. Through feedback from the students, they temporarily The survival rate of Astragalus membranaceus has reached more than 90%, and there has also been a boom in farming in the local area. It has also appeared in the situation of buying yellow hardships and the tragic situation of losing money every day! Analyzed from various situations, the temporary education of the Astragalus is only a short-term effect. To continue the stable development of the Astragalus aquaculture business, it is necessary to walk away from the misunderstanding of the rearing, and the self-complication is the way.
Some researchers have been studying the propagation of Astragalus since the early 1980s, and there have been no successful breeding techniques. Jaundice breeding difficult! Hard to reproduce! It has always troubled people. It is also a headache for experts and scholars. Due to the variability, poor adaptability, strong season and selectivity of Astragalus, and the existence of various undesirable factors such as self-absorption of eggs and special hatching, it greatly hindered the breeding research of Astragalus. In terms of reproduction, researchers have done a variety of experiments: there is a touch of wild natural reproduction, there are full artificial or semi-artificial reproduction, but the effect is not satisfactory. Adopting wild nature breeding, its reproduction rate is low (generally all below 30%), reproductive cycle is long (from the beginning of June to the end of September, there are breeding phenomena), the emergence time is not uniform, the difficulty of fishing seedlings, less emergence, time-consuming and laborious, Not suitable for large-scale development; using artificial or semi-artificial propagation, the fertilization rate, hatching rate, and emergence rate are all very low (final emergence is only about 20%), and the drawbacks of a large amount of aphrodisiac, large damage to the parents, high breeding costs, etc. No promotion value. How to multiply seedlings? How to reduce breeding costs? How to save time and effort? How to avoid the various adverse factors of Astragalus propagation? Comrade Liu Chunjun, a professional aquaculture technician in the experimental breeding field of Astragalus membranaceus in Mianzhu City, Sichuan Province, has been engaged in research work in this area since 1995. After nearly ten years of hard work and repeated practice, he constantly summed up his experience, boldly conceived ideas and technical reforms, and finally There has been a new breakthrough in the breeding of jaundice.
In May 2004, the author returned to Sichuan Suining for the first time. In a breeding pond of approximately 8 square meters, 50 female mating eggs (75 grams weight) are mated, 40 males (about 150 grams in weight) are stocked, and special breeding methods are adopted to raise them to 6 At the beginning of the month, 2 nests were spawned, and the peak of spawning occurred in mid-June. The number of spawning litters reached 35 litters, and spawning fell back in late June. There were only a few litters. At the beginning of July, spawning was completed and 41 litters were laid. A total of 10,660 fishes were counted at the time of hatching until mid-July, with an average of 1,330 emerged per square meter.
Experiments show that using this technology can not only increase the breeding density of Astragalus membranaceus, shorten the breeding cycle, increase the reproductive rate to 82%, reduce the breeding cost to less than 0.02 yuan per tail, but also facilitate the seedlings and seedling cultivation, and also greatly save labor. The advantages have fundamentally solved the problem of the inability of Astragalus to reproduce in batches, and this is expected to become the industrialization, intensification, and scale development of Astragalus membranaceus.
Author: Liuchun Jun in October 2004 draft of the URL: Phone
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