The effect of environmental factors on growth development and alkaloid production of poppy (Papaver somniferum L.). III. Nutrition and light
Bernath, J.; Tetenyi, P.
Acta Agronomica Hungarica 35(1-2): 35-40
Growth, development and alkaloid formation of poppy were studied at different levels of nutrition under phytotron conditions. High-dose nutrition (18.0 mg N, 3.7 mg P, 18.0 mg K week-1 .cntdot. Plant-1) had a toxic effect on dry-matter production under insufficient light conditions, but became effective above 16 klx illumination. Average capsule mass (0.45 g) increased under light up to 0.70 g, while at the same time seed production from 0.58 g to 0.63 g. The maximum of morphinane, benzyl- and phthalideisoquinoline alkaloid accumulation (12.15 mg/g) has been obtained at high nutrition and illumination level. However, a rather characteristic influence of nutrition at 16 klx illumination has been noticed. Under extremely low (8 klx) and high (32 klx) illumination, the effect of nutrition seemed to be of secondary importance.