Hi, I need calculate the mineralization rate of organic matter in soil, can anybody help me please?

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Paul Milham

Mineralisation rates depend on the organic material, the soil conditions and presumably on the microbial ecology. Ask something more specific.

Susantha Jayasundara

Hi,

This is a very wide topic that cannot be explained in a short answer, as other two colleagues already explained above.

Below, I have posted the researchgate link for an excellent reference related to N mineralization, posted by one of authors of the document. If you are interested in N mineralization, please look under the following two sub-titles within the chapter:

42-2. Field methods for estimating net rates of nitrogen mineralization.

42-3. Laboratory methods for estimating net nitrogen transformation rates.

There is another chapter in the same book (Methods of Soil Analysis by SSSA) related to C mineralization (as I remember).

https://www.researchgate.net/publication/304346799_Nitrogen_mineralization_immobilization_and_nitrification

Article Nitrogen mineralization, immobilization, and nitrification

Gustavo Yasser Lorente González

Hi:

I wish thanks all the answer, were very usefull, in special thanks to Susantha.

I´am looking for a method for know how is releasing the nutrientes form organic materia for plant utilization, N mainly, P and maybe K. Because not is only apply Organic materia even how the plant take the nutriments. I work with pineapple.

Thanks

Anoop Kumar Srivastava

Net-N-mineralisation is calculated using the following equation assuming that inorganic N-input from the atmosphere is compensated by gaseous losses).

Net-Nm = Nd + Np + Nl– Nf , where: Net-Nm = net-nitrogen-mineralisation (kg N/ha);Nd = difference in inorganic nitrogen in the soil (0–90 cm) between autumn and spring; (Nmin-au – Nmin-sp, kg N/ha); Np = inorganic nitrogen uptake by plants (kg N/ha);Nl = inorganic nitrogen leached (kg N/ha), negligible for the vegetation period because of the water balance ,Nf = inorganic nitrogen fertilisation through mineral fertiliser and compost-NO3 and -NH4 (kg N/ha)

For details , please consult some PDFs enclosed below:

Sandeep Kumar

Dear Gustavo Yasser,

If you want to calculate the organic matter mineralization rate of organic matter in soil at particular site then either you have to go through the *CO2 flux measurement (CO2 flux analyzer) or by *analysing the soil organic carbon (Walkley and Black 1934) method. You can find the procedural details on internet. All the best.