sicetaitsimple wrote:izentrop wrote:The exudates spread in the fields are a poison for the life of the soil.
Complement: I think you are talking about methanisation digestates?
To my knowledge, this is rather a good thing because it makes it possible to bring back to the field the elements which have not been affected by methanisation, phosphorus, potassium and trace elements, as well as part of the carbon which has not been attacked.
Yes, I couldn't remember the word adequate.
I had already heard of earthworm mortality during spreading, but it does not seem so serious according to INRAE
Despite these data, some point to the potential toxic effects of digestate on soil life. Sabine Houot explains: "As they are very rich in ammoniacal nitrogen (like slurry), they can actually have a toxic effect on earthworms, especially in winter when the soil is very humid and the earthworms are surface. But the counts we have made show that this affected population only represents 1 to 2% of the total population. This loss is also compensated by the increase in the organic matter content in the soil by the digestate, which increases the number of earthworms over time compared to a plot that would only be fertilized with mineral elements. »
https://www.web-agri.fr/methanisation/a ... %20surface.
The proliferation of methanizers can pose problems that aggravate the situation of breeders and farmers with methanizers who need to import waste...
A farmer told us that a neighboring methanizer offered to buy his maize at a higher price than the price usually charged for animal feed. With the drought of this summer 2022, prices have increased so much that the FDSEA of Ille-et-Vilaine got involved. The majority union of farmers has asked the Chamber of Agriculture to distribute “recommended” selling prices. Recommended but not obligatory, because, on this market, the interplay of supply and demand takes precedence. The more methanizers there are, the greater the demand for waste. The higher the prices, the more difficult it is for some farmers to pay for the materials that will feed their methanizer. Until stopping the profitability of an installation.
https://reporterre.net/Methanisation-le ... riculteurs