1.Způsobuje salinizaci půdy
Pokud se kuřecí hnoj používá roky, V půdě zůstává velké množství chloridu sodného. Příliš mnoho soli vážně omezí propustnost a aktivitu půdy. Zifalifikace důležitých prvků, jako je fosfátové hnojivo, Hnojivo draselného, vápník, hořčík, zinek, železo, Boron a mangan omezují zlepšení výnosu a kvality plodin.
2.Hořící kořeny a sazenice
Je snadné způsobit onemocnění rostlin a smrt, pokud není kuřecí hnoj důkladně fermentován. Pokud po použití kuřecího hnoje vložíte ruku do půdy, you will feel the soil temperature is higher. This is the second fermentation of raw manure in the soil. Especially in spring and summer, when the temperature is high in the greenhouse, the secondary fermentation of raw manure will emit a lot of heat, which is easy to cause root burning
3.Bring in antibiotics
Nowadays, in large-scale livestock and poultry breeding, a large number of antibiotics are used to improve feed utilization and promote animal growth. O 70% of antibiotics can not be absorbed after use, so the content of antibiotics in animal feces is generally high. The antibiotics contained in unrolled chicken manure will seriously affect the physiological process of crop roots and significantly inhibit its growth.
4.Breeding of root knot nematodes
Chicken manure is the camp and hotbed of root knot nematodes. The number of eggs carried by chicken manure is 100 per 1000 grams. The nematodes are extremely sensitive to chemical agents. After spraying, the nematodes will quickly move to the depth of 50 cm-1.5 m underground to escape. The nematode eggs in chicken manure are easy to hatch and multiply by tens of thousands overnight, so it is difficult to eradicate the disease.