What harm does uncomposted organic fertilizer do to crops?

What harm does uncomposted organic fertilizer do to crops?

Most farmers use not only chemical fertilizer but also farmyard manure such as livestock dung. So does uncomposted farmyard manure harm crops? What kinds of harm does it cause?

As living standards continue to rise, people's requirements for the quality of food, fruits and vegetables are also getting higher and higher. Besides using organic fertilizers such as compound microbial inoculants, spray granulation products and amino acid water-soluble fertilizers, farmers are also paying more and more attention to applying organic fertilizers such as pig, cattle and sheep manure. However, under normal circumstances, when farmers apply base fertilizer, it is uncomposted organic fertilizer, which creates many hidden dangers for crops.

1. The harm of uncomposted farmyard feed to crops: causing root burn and seedling burn. When unfermented livestock and poultry manure is applied to farmland, because the fermentation is incomplete, a "secondary fermentation" phenomenon will occur. When the fermentation conditions are met, under the activity of microorganisms, the raw manure ferments; when the fermentation site is close to the roots or the crop plants are small, the heat generated by fermentation will affect crop growth, causing "root burn and seedling burn," and in severe cases may lead to plant death.

2. The harm of uncomposted farmyard feed to crops: the threat of pests and diseases. Manure contains pathogens and pests such as coliform bacteria and nematodes. Direct use will lead to the spread of pests and diseases, cause crop disease, and also affect the health of people who eat agricultural products; when uncomposted organic matter ferments in the soil, it easily breeds pathogens and pests, leading to the occurrence of plant pests and diseases.

3. The harm of uncomposted farmyard feed to crops: producing toxic gas damage. During decomposition, uncomposted manure produces harmful gases such as methane and ammonia, causing acid damage to the soil and crops as well as root damage.

4. The harm of uncomposted farmyard feed to crops: causing soil oxygen deficiency. During decomposition, uncomposted manure consumes oxygen in the soil, temporarily putting the soil in an oxygen-deficient state. Under this oxygen-deficient state, crop growth will be inhibited.

5. The harm of uncomposted farmyard feed to crops: massive nutrient loss. In the traditional process of piling and composting manure, due to natural decomposition, wind and rain, and other reasons, nutrients such as nitrogen, phosphorus and potassium are wasted and lost very seriously, and the general utilization rate is only 50%.

6. The harm of uncomposted farmyard feed to crops: obviously slow fertilizer effect. The nutrients in unfermented and uncomposted organic fertilizer are mostly in organic or slow-release forms and cannot be directly absorbed and used by crops. Only after being decomposed and transformed into quick-acting forms can they be absorbed and used by crops. Therefore, direct application without fermentation will slow down the fertilizer effect.

It can be seen from this that raw manure or uncomposted animal manure cannot be directly applied to farmland, otherwise it will bring harm to crops. Uncomposted farmyard manure causes relatively great harm to crops, and everyone is hoped to pay special attention when using farmyard manure. (Complete Guide to Organic Fertilizer Agrochemicals)