# What is the relationship of decomposition rate to C:N ratio?

## What is the relationship of decomposition rate to C:N ratio?

If the C:N ratio is too high (excess carbon), decomposition slows down. If the C:N ratio is too low (excess nitrogen) you will end up with a stinky pile.

## How does C N affect decomposition?

If there is too much carbon, decomposition slows when the nitrogen is used up and some organisms die. Other organisms form new cell material using their stored nitrogen. In the process more carbon is burned. Thus the amount of carbon is reduced while nitrogen is recycled.

What is a good carbon-to-nitrogen ratio?

To acquire the carbon and nitrogen a soil microorganism needs to stay alive (body maintenance + energy) it needs a diet with a C:N ratio near 24:1, with 16 parts of carbon used for energy and eight parts for maintenance.

### How is carbon nitrogen ratio calculated?

Divide the carbon by the nitrogen to get the C:N ratio. If it’s between 25 and 35, your pile should compost beautifully. If the ratio is higher or lower than that, adjust the proportions of ingredients to bring it into the range of 25 to 35 parts carbon for each one part nitrogen.

### How nitrogen helps in decomposition?

The influence of inorganic nitrogen (N) inputs on decomposition is poorly understood. I predicted that N would stimulate the decomposition of lignin-poor substrates but retard the decomposition of lignin-rich substrates. Across these sites, N had neutral or negative effects on decomposition rates.

How is carbon to nitrogen ratio calculated?

## Why is carbon to nitrogen ratio important?

The C:N ratio is important because due to the fact that it has a direct impact on residue decomposition and also nitrogen cycling in our soils. Our optimum C:N ratio is 24:1 for desired decomposition of our crop residue. As a rule of thumb, the higher the ratio, the longer it takes for the material to decompose.

## How do you find the nitrogen ratio?

The nonprotein kcalorie to nitrogen ratio (NPC:N) is calculated as follows:

1. Calculate grams of nitrogen supplied per day (1 g N = 6.25g protein)
2. Divide total nonprotein kcalories by grams of nitrogen.

What is carbon nitrogen ratio in soil?

The carbon-to-nitrogen ratio in soil is the ratio of the mass of carbon-to-nitrogen. A C:N ratio of 10:1 means there are ten units of carbon (C) for each unit of nitrogen (N) in the soil. This ratio influences the amount of soil-protecting residue cover that remains on the soil.