EFFECT OF NUTRIENT SUPPLY ON QUANTITY AND QUALITY OF HEMPSEED PUBLISHEDIldikó Iványi, Zoltán Izsáki
Hempseeds are a rich source of proteins, vitamins, minerals and essential fatty acids. Compared to hemp oil, little research has been conducted on hemp protein, but this subject will receive more attention with the increasing use of hemp foods. Industrial hemp fertilization field experiment have been conducting in 2000 on chernozem meadow soil in Hungary to determine the quantity and quality of hemp stalk and hempseed at different nitrogen (N) application rate and different soil phosphate (P) and potassium (K) levels with Chinese monoecious variety for dual utilization. In this paper we report about the influence of N supply on stalk and seed yield, oil content, protein content, amino acid content, 9 essential amino acid and 8 non essential amino acid content of hempseed. Chinese monoecious hemp is suitable for dual usage. We can achieve 12-14 t/ha good quality stalk yield and 0,6-1,2 tha-1 seed yield with 2,25 million germsha-1 and with 80 kg/ha N fertilization in 3,5 humus content chernozem meadow soil. Hemseed had 32,8-33,6 % oil content, 24,8-26,9 % crude protein content and it contain all nine essential amino acids and eight non essential amino acids. N-fertilization increased the oil content and crude protein content and amino acid content of hempseed till 80-160 kgha-1 rates. More N did not increased or decreased that tested parameters. For dual usage Chinese monoecious hemp fertilization which take int consideration the plant requirements and environments also, is enough 80 kg/ha N application on soil 140-200 ppm AL-P2O5 phosphorus (P0, P1) and 400-430 ppm AL-K2O potassium (K2, K3) supply levels.
industrial hemp; low-cost biological resource; dual utilization hemp; stem/stalk yield; seed yield; THC-content (tetra-hydro cannabinol); oil-content; protein-content; amino acid composition