| 摘要 |
The invention relates to a process for preparing a liquid fertilizer with crop plants symbiosis stimulating effects. According to the invention, the process consists in macerating chopped stinging nettles in rain water followed by fermentation for 4...5 days, at a temperature of 18...20°C, homogenizing the fermented nettle macerate at a pressure of 150 MPa, after which the homogenized composition is diluted 5 times, is subjected to filtration and microbiological ultrafiltration by passing it on a filtering membrane of polyethersulphone with pores of 0.5 μm, at a rate of 500 l/h and a pressure difference of 0.2 bar, to result in a highly stable filtrate. |
