What harm is there in early spring grazing?

In spring, many grasses have sprouted sprouts. The grass in early spring, young and tender, is the food of livestock, but it can't be grazing too early. So, what harm is there in early spring grazing?
1. Hazards to livestock: Early grazing in early spring can cause the following two diseases:
(1) low magnesium sputum: also known as grass cockroaches, mainly occurs in cattle. After grazing grass in early spring, the disease occurs after 1~2 weeks. The pathogenesis: The tender grass has less magnesium, contains more potassium and nitrogen, and potassium and nitrogen can affect the absorption of magnesium, which causes the lack of magnesium in the body.
Symptoms: The incidence of bulls is mild, and the incidence of lactating cows is heavier. Often caused by fear or cold as a cause of sudden onset, light, nervous, panic, and unstable gait while walking. In severe cases, the appetite is greatly reduced, convulsions, and the limbs are involuntarily swiped after lying down. Cow milk production is greatly reduced.
Prevention and treatment: 1 Because of the lack of calcium in addition to magnesium deficiency, it should be supplemented with magnesium and calcium. Bone meal: 1% added as concentrate. Magnesium oxide: 50 grams of beef, 10 grams of yak, added to the concentrate. The above is the amount of one day and should last for one month. 2 In the early spring, you should not graze all kinds of suitable pastures.
(2) Siqing disease: This disease mainly occurs in cattle. Causes of the disease: lack of grass in winter and spring, spring livestock urgently demand green feed, premature grazing livestock to eat a small amount of young grass, induce a strong appetite, that is, aversion to the yellow feed. Too little grass can't meet the demand, that is, it is in a state of expectation for a long time. Symptoms: Standing uneasy in the house, often want to go out. In the wild, I look around and don’t see the grass. Feeding the winter feed, the attitude is indifferent, the food intake is greatly reduced, the long-lasting sensation falls, the body is weak, and it is not resistant to labor. Prevention and treatment: 1 Zhigan points at the bottom of the tongue, lightly stab the bleeding, rub the tongue with a small amount of salt. 2 Regardless of wild grassland or artificial grassland, do not graze prematurely in early spring.
2. Harm to the grassland: In early spring, the grass sprouts grow long, and first depends on the nutrients stored by itself. After 12 to 18 days of growth, the consumption of nutrients is exhausted. Soy sauce 寥      绻诿 绻诿 绻诿 绻诿 ?? Grazing within 18 days, the delicate seedlings are eaten, can not be supplemented with nutrients in time, can not grow, leading to the death or weakening of grass, the annual amount of grass production is greatly reduced or production, seriously affecting the year grazing. Quick success, short-term loss, must not be taken lightly. It is particularly important to emphasize that goats are absolutely forbidden to graze, because goats have a habit of “rooting up” and have a strong destructive effect on grassland.

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