Influence of plant density and fertilization on parsnip yield and quality
1986
Todoric, V. ("Podravka", Koprivnica (Yugoslavia). Istrazivanja i razvoj)
A study on the effect plant density and fertilization have on the parsnip yield and quality showed the following: Plant density and fertilization have a significant effect on the yield and root thickness. Of all the studied plant densities, sowing at a distance of 50 x 10 cm or 200,000 plants/ha had an adventage. This adventage is even more appearant with the highest doses of fertilization (220 kg N, 150 kg P2O5 and 300 kg K2O/ha). The greatest root diameter was found using a plant density of 200,000 plants/ha; plant density did not effect the percentage of dry matter, sugar and cellulose. The N-220, P2O5-150 and K2O-300 kg/ha combination of fertilization gave the highest root yield. NPK fertilization effects the root thickness, but not the cellulose and sugar content in percentage of dry matter. Nitrogen (N), phosphorus (P2O5) and potassium (K2I) content in % of dry matter increases with the increase of N fertilizer with a constant quantity of P2O5-150 and K2O-300 kg/ha. Roots and leaves are rich in vitamins E,C,B1,B2 and PP. The leaf contains 1.2-2.56 mg of carotens/100 g.
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