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High temperatures trigger heat stress in pigs, affecting their physical health
The high-temperature environment from June to September each year disrupts pigs' sex hormone secretion, throwing their normal estrus mechanism out of order, so that estrus symptoms become inconspicuous or the animals do not come into heat at all; high temperatures make pigs devote most of their energy to resisting heat stress, correspondingly weakening their other bodily functions, and for lactating sows and fattening pigs that need to eat large amounts of feed, this leads to insufficient nutrition and the phenomena of low milk output and slow growth; high temperatures make heat dissipation from the boar's testicles difficult, intensify sperm metabolism and shorten sperm lifespan, so that the motility of ejaculated sperm decreases or the sperm even die; high temperatures also increase the death of newly fertilized eggs and make implantation of the fertilized eggs more difficult, thereby lowering the conception rate of summer breeding.
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What to do when greenhouse cucumbers wilt and die, affecting yield?
Wilting causing dead plants and affecting yield: greenhouse cucumber wilting methods and countermeasures
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How to treat egg-laying hens with prolapse affecting egg production
How to treat prolapse in laying hens that affects egg production
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What are the factors affecting the efficacy of fishery drugs?
1. Dosage and dosage form of the drug. The effect of a drug varies with the dosage, and may even change qualitatively. For example, when the astringent metal drug zinc sulfate is used topically, a low concentration has an astringent effect, a medium concentration has an irritant effect, and a high concentration has a corrosive effect. Different dosage forms of a drug, even when the drug dosage is the same, also differ in the strength, effect and duration of action. 2. Route of administration. The route of administration, time of administration, number of administrations and repeated medication all
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Analysis of Factors Affecting the Pigmentation of Sanhuang Chickens and Existing Problems
In recent years, with the development of the domestic poultry industry and the continuous improvement of people's living and consumption standards, consumers have become increasingly discerning in their demand for meat products, and people in East China are particularly fond of Sanhuang chickens. In fact, the yellow color deposited in the shanks and subcutaneous fat of chickens is all lutein, and lutein is a general term for a class of natural pigments. Since chickens cannot synthesize lutein themselves, all lutein present in the chicken body comes from the feed. So, what causes the differences in chicken pigmentation? The following analysis examines this one by one.
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Proper winter management of mushroom beds can avoid affecting next year's harvest
Winter management methods for mushroom beds to avoid affecting next year's harvest
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How to reduce empty and shriveled sunflower seeds affecting yield
Empty and shriveled seeds affect yield: how to reduce empty and shriveled sunflower seeds
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Control Methods for Duck Tracheal Fluke Disease Affecting Egg Production
How to Prevent and Treat Duck Tracheal Fluke Disease When Flukes Affect Duck Egg Laying
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How to prevent and treat goat stomatitis affecting feed intake
How to prevent and treat stomatitis affecting goat feed intake Goat stomatitis
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Control methods for sparse pod set and few seeds per pod affecting yield in early spring edamame
Sparse pod set and few seeds per pod affecting yield: control methods for sparse pod set in early spring edamame
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