Wolfberry is an animal with sexual reversal characteristics. At the growth stage, it begins to be female and later becomes male. In the female stage, the individual is small and grows slowly. After becoming a male, the growth rate is significantly accelerated. In general, the growth rate of Astragalus membranaceus in the female stage is only about 30% of that in the male stage, that is, the growth rate and weight gain rate of Astragalus are more than double that of females. For this reason, in the fattening of commercial loquats, the use of advance male and female seedlings technology can achieve good technical and economic benefits. The main technical points of male and female seedlings are as follows:
First, the male object
1. The seedlings can begin to be applied in the summer flowering period when the yolk sac disappears in the abdomen. The best effect is at this time, and the male period is the shortest;
2. The seedling stage of 20 g body weight has a good male growth effect, but it takes longer to use.
3. Males above 3.50 g can also be male, but they need to be carried out at the beginning of autumn. After the beginning of spring, they must have their effect for 10 days.
4. When applying more than 100 grams, it can accelerate the reversal of males, but it should not be applied during the spawning period.
Second, spraying method
1. Don't feed two days before the summer flower application. When the cooked egg yolk is fed on the third day, the wool will develop the egg yolk into a paste. Add 2 ml of alcohol solution containing 1 mg of methyl testosterone per 2 egg yolks, stir well. After the feeding, its quantity will not exceed. After 6 days of continuous feeding, the egg yolk was changed to mash, and the dose was 2 mg per 50 g of mash (light was dissolved in 5 ml of alcohol). After 15 days of continuous feeding, the drug was discontinued. No more females will appear. For the sake of reliability, when the body weight is 10 grams, it can be applied for 15 days. The dose does not need to be increased.
2. If the male seedlings with a weight of 15g or more are subjected to malelization, a dose of 500g live vinegar is used for agitation of 3g. One month of continuous feeding is completely male.
Third, pay attention to matters
1. The male species should be superior to the elite breeds. The annual weight gain of individuals is up to 350 g. The weight gain of wild species is not obvious.
2. Dosage should not be too large at the beginning and can be gradually increased to the allowable amount.
3. When eating, the area of ​​the food table should be larger than usual to avoid uneven feeding.
4. During the male period, the disinfectant should not be used in the pool, but quicklime can be applied. The amount can be calculated from 5PPM to 20PPM, 5PPM to 10PPM in spring and autumn, and 10PPM to 20PPM in summer. Before the application, insert some holes in the soil to facilitate the release of harmful gases.
5. The consumption of the male and female breeds was greatly increased, and the amount of food consumed was 10% of the body weight, but the feed conversion rate and weight gain rate were significantly increased. 3 kg Daping No. 2 fresh squid could increase the weight of 0.5 kg of quail meat; 2 kg Tenebrio can gain 1 kilogram of fat. 7 months can be fat to sell. Due to the high speed of weight gain, the body becomes stronger and stronger in advance, thereby increasing the resistance to disease and increasing the stocking density. Therefore, male and female seedlings are also one of the effective measures for artificially cultivating jaundice.
First, the male object
1. The seedlings can begin to be applied in the summer flowering period when the yolk sac disappears in the abdomen. The best effect is at this time, and the male period is the shortest;
2. The seedling stage of 20 g body weight has a good male growth effect, but it takes longer to use.
3. Males above 3.50 g can also be male, but they need to be carried out at the beginning of autumn. After the beginning of spring, they must have their effect for 10 days.
4. When applying more than 100 grams, it can accelerate the reversal of males, but it should not be applied during the spawning period.
Second, spraying method
1. Don't feed two days before the summer flower application. When the cooked egg yolk is fed on the third day, the wool will develop the egg yolk into a paste. Add 2 ml of alcohol solution containing 1 mg of methyl testosterone per 2 egg yolks, stir well. After the feeding, its quantity will not exceed. After 6 days of continuous feeding, the egg yolk was changed to mash, and the dose was 2 mg per 50 g of mash (light was dissolved in 5 ml of alcohol). After 15 days of continuous feeding, the drug was discontinued. No more females will appear. For the sake of reliability, when the body weight is 10 grams, it can be applied for 15 days. The dose does not need to be increased.
2. If the male seedlings with a weight of 15g or more are subjected to malelization, a dose of 500g live vinegar is used for agitation of 3g. One month of continuous feeding is completely male.
Third, pay attention to matters
1. The male species should be superior to the elite breeds. The annual weight gain of individuals is up to 350 g. The weight gain of wild species is not obvious.
2. Dosage should not be too large at the beginning and can be gradually increased to the allowable amount.
3. When eating, the area of ​​the food table should be larger than usual to avoid uneven feeding.
4. During the male period, the disinfectant should not be used in the pool, but quicklime can be applied. The amount can be calculated from 5PPM to 20PPM, 5PPM to 10PPM in spring and autumn, and 10PPM to 20PPM in summer. Before the application, insert some holes in the soil to facilitate the release of harmful gases.
5. The consumption of the male and female breeds was greatly increased, and the amount of food consumed was 10% of the body weight, but the feed conversion rate and weight gain rate were significantly increased. 3 kg Daping No. 2 fresh squid could increase the weight of 0.5 kg of quail meat; 2 kg Tenebrio can gain 1 kilogram of fat. 7 months can be fat to sell. Due to the high speed of weight gain, the body becomes stronger and stronger in advance, thereby increasing the resistance to disease and increasing the stocking density. Therefore, male and female seedlings are also one of the effective measures for artificially cultivating jaundice.