Chicken manure, cow manure, pig manure which is better for making organic fertilizer?

Generally speaking, the fertilizer that can be used as organic fertilizer is basically chicken manure, cow manure and pig manure. Compared with these three raw materials of organic fertilizers, which one is better?
First of all, the contents of these three types of feces are completely different. Chicken manure contains high organic matter, accounting for 25%, followed by pigs
dung and cow dung. Therefore, it can be simply said that chicken manure has the highest nutritional value. In fact, it can be seen from the production of feces alone.

Chicken’s main food is insect cereals, and the digestive esophagus is relatively short. Under normal circumstances, these foods can be digested and excreted within a few hours, so the nutritional value of chicken manure is also higher. The main food of pigs is cereals, digestion time is longer than chickens, and the nutritious are well in feces. But the food of the cow is grass, and the cow has several stomachs. It takes a long time to digest food before it is eliminated. Relatively speaking, the nutritional effect of cow manure is not as good as chicken manure and pig manure.
Secondly, the difference between the three can be seen from the water content. Cow manure has the highest water content, followed by chicken manure and pig manure. One should not think that high water content means good, it depends on the crop. Cow dung has high moisture content, that is, poor air permeability, organic matter is not easy to decompose, and its nutritional value is not high. But its advantage is that it can improve the soil structure, so adding cow dung to rice planting has obvious effects. The rice grows very well.
Finally, pig manure has the highest humus content. The composition of pig manure is the most complex of the three, and the manure is relatively delicate. Pig manure is easily decomposed by microorganisms, and the decomposed substances make it easier for crops to absorb. Relatively speaking, cow dung is the most difficult to decompose and needs to be used in conjunction with other fertilizers.
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