Why Should Straw be Added in the Process of Composting Organic Fertilizer From Livestock Manure

With the popularity of organic fertilizer, I think we all know very well that the main material of organic fertilizer is livestock manure, but only livestock manure is not enough, but also need to add about 30% of straw as a supplementary material. Why do you need to add straw as auxiliary material?

1, Adjust C/N

The C/N of composting raw material should be (25~35):1, the N element of livestock manure is high and C element is low, the low C/N will make the microbial reproduction will be inhibited by the lack of energy, resulting in slow and incomplete decomposition. And the C element of straw is higher, adding the right amount of straw can regulate the C/N of composting raw materials.

2, Neutralize Water

The initial moisture content of composting raw materials is best at 50%-60%, while the moisture content of livestock manure is 55%-85%, which is large and requires the addition of dry matter to adjust the moisture content. Straw is dry, strong water absorption rate, very suitable as auxiliary materials and moisture neutralization.

3, High Organic Matter ontent of Straw

According to China's organic fertilizer implementation standards "NY 525-2021", organic fertilizer organic matter content needs to be above 30%. High organic matter content of straw, livestock manure composting process add a certain amount of straw, can increase the organic matter content of the finished organic fertilizer.

4, Increase the Gap of the Pile

In order to save the site, the height of the compost is generally more than 1 meter, or even up to 2 meters. And the high specific gravity of livestock manure, it is easy to form an ozone environment. The crushed straw has greater porosity, which can increase the external air into the interior of the pile and reduce the anaerobic reaction to produce bad odor. In addition, it is necessary to use tossing equipment to turn regularly to increase the oxygen content of the pile, so that beneficial microbial bacteria to speed up the reproduction rate and improve the efficiency of fermentation, but also to regulate the temperature of the pile, to avoid the loss of nutrients to the pile from the super high temperature generated by fermentation.