Depending on the particular type of biofertilizer and the microbial activities involved, the effect of biofertilizers on soil pH can vary. Due to their varied nutrient release processes and interactions with soil components, various biofertilizers may have contrasting impact on soil pH. The following are some typical ways that biofertilizers might affect soil pH:
Acidifying Organic acids can be produced by some biofertilizers as part of their metabolic processes, such as those based on specific bacteria and fungus. These organic acids may cause a modest drop in soil pH, increasing the acidity of the soil. The effect of acidity is often minimal and transient.
On the other side, some biofertilizers have the potential to make the soil more alkaline. For example, some biofertilizers based on cyanobacteria might release alkaline chemicals, leading to slight increase soil pH and making the soil more alkaline.
Nutrient Release: Biofertilizers, such as those containing bacteria that fix nitrogen or dissolve phosphate, make it easier for nutrients like ammonia (NH3) or phosphates (PO4) to enter the soil. Depending on how the crops are absorbed, the use of these nutrients by plants may change the pH of the soil.
Decomposition of Organic Materials: Some biofertilizers, such as those based on compost or those containing organic matter, assist in the breakdown of organic materials in the soil. Since some byproducts of decomposition can affect pH levels, the breakdown of organic matter may have an effect on soil pH.
Long-Term Effect: Because biofertilizers affect the soil’s health and nutrient availability, they may have a longer-term impact on the pH of the soil. Biofertilizers can affect the pH and pH buffering capability of the soil by enhancing microbial activity and nutrient cycling.
