The effect of manure-lignin compost on the productivity of agrocenoses in the Komi Republic

The effect of various doses (50, 100, 200 and 1000 t/ha) of manure-lignin compost on the productivity of perennial grasses (Poa pratensis L., Dactylis glomerata L., Alopecurus pratensis L., Phleum pratense L.), sown under the cover of pea-oat mixture, was experimentally studied in the Komi Republic. According to the study results, manure-lignin compost in high dose, as well as peat-manure compost at a dose of 200 t/ha, allows for the highest hay yield. The gross hay harvest for eight years in both cases of fertilizing amounted to 291.1 and 251 c/ha, correspondingly, which is by 132 and 91.9 c/ha higher than the harvest without fertilizers (159.1 c/ha). The quality of hay met the requirements of zootechnical science. Finally, we found out that manure-lignin complex at high dose largely increased the content of mobile phosphorus and potassium forms by 1735 and 301.8 mg/kg, relatively, and the humus content by 3.55 % in soil at the experimental site.