The impact of fertilizing of fenugreek yield (Trigonella foenum-graecum) and diosgenin content in the plant drug
2001
Zupancic, A. | Baricevic, D. (University of Ljubljana, Ljubljana (Slovenia). Biotechnical Faculty) | Umek, A. | Kristl, A.
The impact of fertilizing on the seed yield and the diosgenin content in four cultivars (Margaret, Ionia, Barbara, Paul) of fenugreek (Trigonella foenum-graecum) was observed in a three-year field experiment (1995-1997) on two diverse climatological and pedological localities in Slovenia. The seed yields and their diosgenin contents were compared in all four cultivars after various fertilizing schemes that had been applied (organic fertilization with no addition of nitrogen fertilizers, optimum fertilization with mineral nitrogen, high dosage of nitrogen fertilizers and control treatment without fertilizers). When compared to the control treatment, high nitrogen fertilizing (170 kg/ha) had no impact on the seed yield. Application of 30 kg N/ha (optimal nitrogen fertilization dosage) or of organic matter (43 t R-Substrate/ha) increased the seed yield on poor soil. The content of diosgenin, measured with GC, was not significantly influenced by different fertilizing schemes (a = 0.01). The lowest content of diosgenin was observed in cv. Ionia, the highest in cv. Margaret and in cv. Paul, which had simultaneously the highest absolute weight of seed. The yield of diosgenin per hectare can be increased only with selection of a cultivar with a high seed yield (Ionia, Barbara).
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