Biochar is primarily used as organic manures in the soil that improve water as well as nutrient use efficiency. Lets starts discussion here and this would be great for researchers...
@Uma Nath Shukla...its depends upon their use and where it apply. Generally, owing to slow mineralization it releases low amount of nutrients, but it acted best to conditioning the soil and improve soil health by maintaining SOC and buffering the soil reaction. So it can be used as source of nutrients from organic as well as amendments. The quantity is matter, if used in more than 3 tonnes per hectare, it acted as source of nutrients and when it applied at the rate of 1 to 2 tonnes per hectare then it acted as amendment.
@ Manju Lata Mishra, yes you are right, it depends upon on quantity how much to apply.
Biochar has the potential to produce farm-based renewable energy in an ecofriendly way. Specifically, the quality of biochar depends on several factors, such as the type of soil, metal, and the raw material used for carbonization, the pyrolysis conditions, and the amount of biochar applied to the soil. In addition, the biochar amendment to the soil proved to be beneficial to improve soil quality and retain nutrients, thereby enhancing plant growth. Since biochar contains organic matter and nutrients, its addition increased soil pH, electric conductivity (EC), organic carbon (C), total nitrogen (TN), available phosphorus (P), and the cation-exchange capacity (CEC) . Earlier, Verheijen et al. reported that the biochar application affected the toxicity, transport, and fate of various heavy metals in the soil due to improved soil absorption capacity. The presence of plant nutrients and ash in the biochar and its large surface area, porous nature, and the ability to act as a medium for microorganisms have been identified as the main reasons for the improvement in soil properties and increase in the absorption of nutrients by plants in soils treated with biochar.
For more details about this discussion plz take a look at the pending pdf.
Ali Alhayany Thanking you sir for sharing your experiences with us. Yes some of the scientist have reported that owing to its higher absorption capacity, it likely be absorbed heavy metals that could be highly toxic to plants as well as microbes. As it work as carbon source to microbes, it would be better if excluding some toxicity absorption. The mineralization of biochar may also be catalyses by adding some quantity of nitrogen in the soil so that C: N ration of soil as well microbes may be maintained.
Ali Alhayany As an amendments, it work well in acidic condition and improve soil health and also caused to enhances certain bacterial action.
Biochars are not at all used as nutrient source , rather its an amendment , apart from providing the most recalcitrant form of carbon having carbon residence time in soil of nearly 50 years or so.....
Anoop Kumar Srivastava It is used to ameliorate the soil and even act as chelation agent for micronutrients. It is rich source of carbon that nourish the soil.
Amendment or ameliorant its same. Chelating properties of biochars are poor because recalcitrance of carbon. Rest what i said, you are repeating the same ...
Anoop Kumar Srivastava Sir, Even biochar also having potential to reduces inherent toxicity of herbicides while applying in the soil particularly pre-plant incorporated and pre-emergence herbicides bcz, it has good absorptive capacity.
Yes, they do have but need reaction products to be leached out of effective root zone of crop...
It is a reduced carbon sources with very high stability requiring a decomposition time more than 1000 years depending on the production processes. Its porous nature and high sorption sites improve soil physical and chemical properties. It can work well in acidic soil as an amendment due to its very high pH. It can contain some nutrient elements as well. Especially those of alkaline (K, Na) and alkaline earth elements (Ca, Mg). This nature may increase soil salinity. It is also can have contribution carbon sequestration. Other organic manures usually have faster turn-over time.
Besides, provide habitat for microorganisms as well as for soil fertility improvement.
Veli Uygur Yes it has alkali in reaction so that it only be applied in acidic soil
Deniel Sang Owing to high C: N ratio, the mineralization is very low and this can be narrow down by application of nitrogen then microbial population may mineralized it fastly.
Biochars is mostly used as an amnedment rather than source of nutrients.....regardless of soil types and crops...
Climate change is threatening food security around the world. When farmers use Biochar as a soil amendment they will benefit from:
• Bigger yields • Healthier soil • Lower acidity • Better water retention • Stronger plants • Richer soil life • Less contamination • Higher fertility • Promotes seed germination
Biochar seems to have no end of uses that derive from a handful of key characteristics.
see the link below
https://warmheartworldwide.org/biochar/?gclid=Cj0KCQiA5vb-BRCRARIsAJBKc6IRnmXXlvLjS73myQrA8GlXIh--6sAtB2zdinAAZ1M6GmzHbZk9nc0aAvByEALw_wcB
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