The matter is very complicated, when we add fertilizers, especially nitrogenous fertilizers, the ratio of nitrogen to carbon will change, and thus the mineralization process of the organic matter will take place, and the addition of nitrogen fertilizer will help them increase the growth of plants and thus increase the organic matter, but in the end these plants will be harvested and excessive fertilization leads to soil deterioration and pollution. Water sources
Sandip Kumar Gupta
The application of inorganic fertilizers was reported to affect the soil aggregate distribution and its associated organic C by increasing the aboveground and root biomass due to the immediate supply of plant nutrients in sufficient quantities
Dear Sandip Kumar Gupta
Fertilization is widely used worldwide to improve soil fertility. Excessive fertilizer application aggravates the decline of soil organic matter and fertility and accelerates soil acidification. Soil properties affect the community structure of soil microbes6. Fertilization influences soil microbial diversity through direct effects on the soil nutrient content. Soil microbial communities are sensitive to fertilization and their responses to manure and/or mineral fertilizers in soils have been well studied over the past several years. The long-term application of nitrogen fertilizer or nitrogen fertilizer in combination with other mineral fertilizers affects the nitrogen cycle and related bacterial populationsRepeated overuse of chemical fertilizer can have a negative effect on soil quality and soil microbial community structure. The long-term application of chemical fertilizers can significantly reduce soil pH which is closely associated with decreased bacterial diversity and significant changes in bacterial community composition, livestock manures can prevent soil acidification and its effects on soil bacteria.
I hope I can able to help you.
Best wishes :)
Destroy microorganism In the soil that work on the production of OM to make available for plants
In my view, agrochemicals do not improve the organic matter in the soil. Instead, it degrades the soil quality and soil microbial community structure. Excessive use of fertilizer pollutes the environment and does not meet the nutrient demand of the crop.
I think that mineral fertilisation aims to make minerals available without any consideration of organic statue of the soil.
Chemical fertilizers are meant to make nutrients readily available to the plants, but will not contribute to increase organic matter in the soil.
In my opinion inorganic fertilizer does not increase the organic content in the soil it only fulfill the need of inorganic nutrients if used in appropriate amount otherwise it will harm the crop.
Many many thanks for your contribution to the discussion. Indeed it is really helpful...
I strongly agree with Ladan Ajdanian's point of view. Inorganic fertilizer, namely chemical fertilizer ( including nitrogen, phosphorus, potassium, compound fertilizer ), have been utilized comprehensively in agriculture. Excessive fertilizer application aggravates the decline of soil organic matter and fertility and accelerates soil acidification.
The inorganic fertilizer should be used with organic fertilizer, which can condition the soil and enrich the diversity of soil nutrients. Especially nowadays, due to the pollution of soil, more and more researchers and professionals advise the stakeholders in agriculture to use more organic fertilizer in a bid to provide healthy food, vegetable and to protect our environment.
Thanks. Hope the above can meet your question from some regards.
No, the use of inorganic fertilizer can only increase the nutrient content of the soil.
Yes of course such as nitrogen element increases the protein.
Mr.Sandip, it is a good question. Normally farmers go for application of good amounts of fertilizer application under irrigation. Also, where ever irrigation is available farmers go for multiple cropping (at least two crops per year). When two or more crops are grown under irrigation, lot of roots and stubbles are generated and incorporated in the soil. Long term fertilizer experiments provide opportunity to study whether there is improvement in organic matter and nutrient status in soil under irrigation and fertilization in multiple or double cropping.Long term experiments started in India in 1971-72 are nearly half a century old and are being continued. NPK and S fertilizer application nearly maintained organic carbon status in acidic Alfisol of Ranchi under soybean-wheat system.There is some improvement in organic carbon status in Alfisols of Palampur and Bangalore.There is noticeable increase in organic carbon status in Inceptisol(Ludhiana )from 3.1 to 3.7 g/kg under maize-wheat and in Vertisol (Jabalpur ) 5.4 to 8.0 g/kg soil under soybean-wheat system. Improvements in organic carbon status depends on carbon inputs, soil moisture and temperature regimes and cultivation practices.Addition of farmyard manure along with fertilizer application further improved the organic matter status of soils under long term cropping,fertilization and irrigation.
If the fertilizer lifts the limiting factor that conditions the increase in SOC, a positive effect can be expected. In a study that I carried out, I observed that the SOC value increased for the following year if the availability of N-NO3 was greater than 0.8 * C / N of the soil, or it decreased the next year if it was less. In any case, I share the concern about the acidification effect (an event that is occurring in the agricultural soils of Uruguay) that the fertilizer may have and in this context I would evaluate the temporal trend of the soil pH. PS: excuse the English, I use google translate
Not at all. There is no scope to add organic matter to the soil by applying inorganic frtilizers. Inorganic fertilizers can increase the soil fertility for a certain time after its application. Instead, the excess use of inorganic fertilizers make the soil toxic and that is the causes to destroy different beneficial microbes/microorganisms of soil.
Andres Beretta I appreciate your answer.There are two problems with acid soils. If one applies acid forming nitrogenous fertilizers to acid soils, the soil pH will further decrease. Acidic soil pH will interfere with crop nutrition, growth and production. If the soil pH is low, crop yields will be low even with fertilizer application, then the crop roots and stubbles returned to soil will be low. In such conditions the fertilizer application may not increase the soil organic carbon content . In neutral to slightly alkaline soil conditions, the crop growth will be normal and crop will respond to application of fertilizers. When good amounts of roots and stubbles are returned to soil as mentioned by me earlier, the fertilizer application may either maintain or increase soil organic carbon status.
Sandip Kumar Gupta .Interesting question. However, there are number of studies which have showed that proper use of fertilizers can help to increase the soil organic carbon. This becomes possible owing to better growth of the underground plant parts due to fertilization. These plant parts remain inside the soil after harvest and contribute to soil organic carbon. In addition, vegetative growth of above ground plant parts also increase on fertilization. Some of these plant parts also accumulate in the soil and increase the organic carbon values there.
G.N. Chattopadhyay Andres Beretta Annangi Subba Rao and Bin Liu Many many thanks for your contribution to the discussion. Indeed it is really helpful.
Inorganic fertilizers in of themselves do not decrease increase or maintain organic matter.
The equation of emission from the soil and the sequestration in the soil is a gage of net carbon accrual and depletion.
When the soil increase in carbon exceeds the losses from respiration the net value will be mathematically negative which signifies a net increase in soil organic matter.
The dynamic of the soil can be determined in long term studies.
When the fertilization added to soil losses which can happen the fertilization is depletive to the soil system.
When fertilization leads to greater soil organic matter it is being enriched in soil organic even with the negative mathematical value.
A net carbon of zero is an indication of sustainability or dynamic stability but if the state of the soil is depleted it is not being optimized.
The goal of our agricultural systems could target a return of the lost carbon values which make the soils dynamically buffered from most drought and fertility issues.
The carbon is always linked with the ability to maintain improved soil conditions especially related to moisture which carbon is linked to in photosynthesis and in the humic portion of the soil.
When adding mineral fertilizer to the soil, it increases the activity of micro-organisms as well as increases the growth of the roots, and with the passage of time a part of these organisms dies, as well as the roots slough off and begin to decompose, which leads to an increase in the organic matter in the soil
Dear Sandip Kumar Gupta, the use of inorganic fertilizers do not increase the organic matter of the soil.
No, the use of inorganic fertilizer can not increase / cannot contribute the organic matter in the soil.
There's a problem with the question. Organic matter can only be added directly to soil properties
What is known is that a rational use of fertilizer improve the soil nutrient as a direct effect. By improving crop yields and plant growth in general.By increasing the vegetative biomass production on the field, fertilizers are known to increase organic matter production in long term.
Organic matter will be decreased, though inorganic fertilizers will promote biomass production but by promoting microbial decomposition it will decrease indigenous organic matter if no additional om is supplimented
Initially no, because the incorporation of inorganic fertilizer in to the soil can only increase the nutrient content. But if it is reincorporated, for example, the produced biomass, yes.
Based con my perception no. Inorganic fertilizers only going to increase nutrients status of the soil.
Use of inorganic fertilizers will certainly not increase the organic matter, it will only increase the fertility status of the soil. But indiscriminate use of inorganic fertilizers will definitely decrease the productivity of the soil. For increasing organic matter green manuring crops, compost , FYM etc should be applied.
Prava Kiran Dash
You are correct. Balanced fertilizer application with N, P, K, S and micronutrients will increase both crop dry matter and yield. After the harvest of crop, the crop roots, stables and fallen leaves remain in soil. Due to the microbial activity, the added organic matter, decomposes , part of it goes out as CO2, part of it forms microbial biomass and part it remain in soil as resistant pool.Over time the resistant pool or stable organic form builds up in soil .To say other way, the humus form of carbon builds up in soil and remain there at least several years or few decades.However, part of it undergoes slow decomposition in soil. So if balanced fertilization is followed over years as in long term experiments, there is scope to build up soil organic matter especially under irrigation and multiple cropping where lot of organic inputs in the form of roots, stubbles and leaf fall are returned to soil.
Annangi Subba Rao Thank you Dr. Rao for your elaborate answer in support of the comment of Prava Kiran Dash
.I touched the point earlier. However, the matter will be more clear after your lucid explanation.I am tempted to supplement your comments with a statement made by Benbi(2015) in the NAAS publication State of Indian Agriculture:Soil here . He showed that in Indian soils balanced fertilization can increase SOC from 6--100%. Similar observations are many under different long term fertilizer experiments.
I agree with Dr. Annangi Subba Rao that balanced application of N, P , K and S will lead to organic matter build up in the soil, although to the extent limited by the prevailing climate in the region. But I would like to add that if fertilizer N is applied at more than the optimum levels on a long-term basis, it can lead to loss of soil organic matter. I would like all concerned to go through the attached publication of mine ; ''Are Nitrogen Fertilizers Deleterious to Soil Health?.
No, inorganic fertilizers only increase nutrient status of soil not organic matter directly. But indirectly Inorganic fertilizer increase biomass of plant which will provide organic matter for incorporation in soil.
Soil organic matter is maintained or increased through continuous in situ generation of organic inputs or external additions through manures, composts or green manures.The quantum of in situ generation of organic matter and its subsequent incorporation in soil depends on good agronomic practices including irrigation , fertilizer application and inclusion of a legume in the rotation. Nitrogen fertilizer application alone at recommended optimum level may maintain organic matter in the soil (except in acid soil) through inputs of roots and stubbles.Higher nitrogen application rates may accelerate the soil organic matter decomposition and may lead to depletion of soil organic matter. Further balanced fertilization , irrigation and multiple cropping may increase the soil organic matter over time due to higher inputs of organic matter. However, the magnitude of increase in organic matter depends on agroclimatic conditions and cultivation practices.Balanced fertilization and manure application increased soil organic matter under irrigated and double cropping conditions in many agroclimatic conditions of India.
I think, If we use inorganic fertilizer it increase biomass of plant and there is no increase organic matter directly but indirectly it increase organic matter
Use of inorganic fertilizers increases the biomass of crop both upper as well as lower so due to more rhizospheric area microorganisms no and activity also increases which improves the organic content of soil. After the crop cutting root decoposition and biomass addition to soil improves organic matter.
The matter is very complicated, when we add fertilizers, especially nitrogenous fertilizers, the ratio of nitrogen to carbon will change, and thus the mineralization process of the organic matter will take place, and the addition of nitrogen fertilizer will help them increase the growth of plants and thus increase the organic matter, but in the end these plants will be harvested and excessive fertilization leads to soil deterioration and pollution. Water sources
Sandip Kumar Gupta
The inorganic nitrogen fertilizers caused O.C changed to O.M faster and easier. This condition isn’t good alway. In the poor soils may be help to emission
I request younger colleagues to read fully the article attached by Dr.Bijay Singh to understand the full story of fertilizer effect on soil organic matter. Instead of just speculation, any authentic publication you have read or comeacross on the subject may be put up for meaningful discussion.
Chemical fertilizer application alone depletes soil organic matter, as a common practice when crop residues or organic manures are not added. It is the worst when imbalanced fertilizer use occurrs.When crop residues or organic matter are added the situation is reversed.
Inorganic fertilizer is also called "chemical fertilizer". Inorganic fertilizers generally have the advantages, such as, high nutrient content, fast fertilizer efficiency, easy to be directly absorbed and utilized by crops, significant increase in yield, and the merit of convenient application, storage and transportation.
Excessive fertilizer application aggravates the decline of soil organic matter and fertility and accelerates soil acidification, cited from Ladan Ajdanian. Excessive inorganic fertilizer application can change the ratio of PH and diversity of soil which is adverse to improve the agri-productivity.
The ideal usage of fertilizer is the proper mixture of inorganic fertilizer and organic fertilizer in a bid to improve the agricultural productivity, decrease the soil pollution and increase the bacterial diversity in the soil .
Hope the above mentioned can help. Merry Charismas all.
No, use of inorganic fertilizers doesn't increase organic matter
Sachin Kanta Rautaray Kanala Vishnuvardhan Reddy Mohammed Alobaidy and several other participants in this discussion. Kindly do not write what you just think. Support your statements with published evidence. May I ask all the young scientists to go through the attached publication - kindly read between the lines
Several publications showed that application of chemical fertilizers increase soil organic matter with comparison to without chemical fertilizer that means increased SOM. Continuous use of alone N fertilizers is very harmful for all nutrients status.
Balanced fertilization and fertilizer application based on soil health card definitely promote soil organic carbon in soils
Balanced fertilization in association with return of crop residues or additional application of organic matter enhances soil organic matter.
I have a submission to the young generation who have initiated this discussion and are keenly involved with various opinions. We have discussed that , in contrary to general concept, balanced fertilization can improve the organic matter status of the soils. The reasons have also been elaborated by several experts.. However, it is to be kept in mind that such increments are not very high and this is an indirect and additional effect of fertilization. Balanced use of fertilizers should not be taken as a substitute of organic manure application for increasing organic matter status of soils.
Balanced fertilizers useful for sustained soil health and also improve the soil organic matter but its depend to soil to soil
Perhaps it may increase indirectly to some extent. For instance, urea may contribute to higher biomass production and upon harvest, the residual materials may contribute to the OM.
Applying less amount or near optimum levels of fertilizer nitrogen will increase the organic matter content of Soil. However, applying amounts higher than the crop need will result in retained some amounts of nitrogen in soil that will accelerate the decomposition process of organic matter. Precise use of inorganic fertilizer nitrogen employing the concept of need-based or spoon feeding the crop is important in such aspect to eliminate or reduce the negative effects of fertilizers on soil OM.
Use of inorganic fertilizers and removal of crop residues doec not add organic matter. Rather depletes it.
it depends,
in cropping soils it decreases,
in poor steppe soils it increases
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