Effect of nitrogen level in the substrate on yield and alkaloid content in Catharanthus roseus L. (G) Don.
Barbara Łata, Ała Sadowska
Anticancer Plant Laboratory
Warsaw Agricultural University
Nowoursynowska 166, 02-787 Warsaw, Poland
The experiment was carried out in the Anticancer Plant Laboratory, Warsaw
Agricultural University, in the years 1989-1991. The plants were grown in
pots in the greenhouse. The pots (10 dm3)
were filled with peat substrate, at pH 6.0-6.5. Six levels of nitrogen
were tested: 50, 100, 150, 200, 300, and 450 mg N dm-3,
50% in the form of (NH4)2SO4
and 50% as Ca(NO3)2.
Phosphorus and potassium content was constant - 100 mg P dm-3
and 200 mg K dm-3 in the form
The substrate was analysed at fornightly intervals and N, P, K, salinity
and pH were adjusted to the established levels. Fertilization had a
significant effect on the leaf N, P, and K contentm yield of the crude
material and plant height. The highest yield of raw material (leaves and
roots) was obtained at the level of 200 mg N dm-3.
Alkaloid content in the dry matter of leaves increased with the increasing
N level. The highest yield of alkaloids was obtained at 300 mg N dm-3.
The highest level of N (450 mg dm-3) reduced most of the parameters studied.
Łata B., Sadowska A., 1996. Effect of nitrogen level in the substrate on yield and
alkaloid content in Catharanthus roseus L. (G) Don. Folia Horticulturae 8/2: 59-69.