Digestāta un koksnes pelnu maisījumu ietekme uz lucernas produktivitāti = The effect of digestate and wood ash mixtures on alfalfa productivity
2023
Adamovičs, Aleksandrs | Gūtmane, Iveta
The objective of the research was to study the influence of different rates of the digestate and wood ash mixture fertilizer on the quality of alfalfa (Medicago sativa) yield. Field trials with alfalfa were carried out on sodstagnogley soil. The soil agrochemical parameters were: pH KCl 6.0, organic matter content – 2.2%, phosphorus (P2O5) content – 50–80 mg kgE−1, and potassium (K2O) content – 160–190 mg kgE−1. Fertilizers of the mixtures consisting of pig and cattle manure digestate and woodchip ash in different ratios (digestate to wood ash = 1:0; 3:1 and 4:1) were used for alfalfa fertilisation. The norms of the innovative mixed fertilizer for alfalfa were 15 and 30 t haE−1. Both norms of the pure digestate from pig and cattle manure were used as control. Trials were conducted randomized in three replications. No significant differences between the values of soil acidity were observed at the beginning of the experiment. In the course of the trial, pH KCl increased and varied from 6.6 to 6.8, which was optimal for alfalfa growing. On average, the use of innovative fertilizer contributed to a significant increase in crude protein (CP) content for all variants. A significant (p<0.05) fertilization influence on alfalfa yield was also observed.
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Издатель Latvijas Biozinātņu un tehnoloģiju universitāte
