Effects of legume-grass mixtures and mineral fertilization on soil fertility
2004
Baluch, A. | Benedycki, S.,Uniwersytet Warminsko-Mazurski, Olsztyn (Poland). Katedra Lakarstwa
The aim of the study was to determine soil abundance in nutrients after three and five years of legume-grass mixture application, depending on the mineral fertilizer rate. The experiment was performed under conditions of the Olsztyn Lakeland (Poland). The first experimental factor was a legume-grass mixture (50 percent legumes + 50 percent grass): A - Trifolium pratense + Festuca pratensis, B - Lotus corniculatus + Dactylis glomerata, C - Trifolium repens + Lolium perenne, D - Medicago lupulina + Festuca rubra. The other experimental factor was a different level of mineral fertilization: 1 - control: 0 kg N, P and K/ha, 2 - 0 kg N, 34.88 kg P and 99.6 kg K/ha, 3 - 60 kg N, 34.88 kg P and 99.6 kg K/ha, 4 - 120 kg N, 34.88 kg P and 99.6 kg K/ha. An analysis of soil fertility made after three and five years of legume-grass mixture application showed a significant increase in organic matter content, after three years the highest increase was observed for mixture A, and after five years - for mixtures C and D. The total nitrogen content of the soil increased as well, except control treatments with mixture D. After three and five years of legume-grass mixture application the ploughing layer was characterized by medium and high available phosphorus concentration, low and medium potassium concentration, and low or very low magnesium concentration
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