Effects of fertilizers on grasses dry matter yield, biomass quality, and removal of plant nutrients | Mēslojuma ietekme uz zālaugu sausnas ražu, biomasas kvalitāti un augu barības elementu iznesi
2018
Platace, R., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Adamovics, A., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture
In a grassland experiment of the Research and Study farm “Peterlauki” (56°53'N, 23°71'E) of the Latvia University of Agriculture (LLU) from 2012 to 2016, it was found that fertilizer is an essential factor in increasing the dry matter yield of herbaceous plants. Phosphorus and potassium fertilizers (P80K120) increased the dry matter yield of five grass species (reed canary grass, festulolium, timothy, meadow fescue, and tall fescue) by 21% on average (from 9% for tall fescue to 31 % for timothy and 32 % for meadow fescue). When nitrogen was used ≥90 kg haE-1 N for all grass species, nitrogen content in biomass increased considerably. Significant differences in phosphorus content in fertilizer variants were not observed. Potassium content in the biomass of herbaceous plants increased under the influence of both fertilizers – PK and NPK. In the variants with no fertilizer application, 49.7 kg haE-1 of N, 27.8 kg haE-1 of P2O5 and 117.2 kg haE-1 of K2O were removed in plant dry matter from the soil. When herbaceous plants were fertilized with phosphorus and potassium (P80K120), the removal of plant nutrients in dry matter increased by 17% of nitrogen, 16 % of phosphorus, and 23% of potassium.
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