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Effect of Whole Season CO 2 Enrichment on the Cultivation of a Medicinal Plant, Digitalis lanata
Author(s) -
Stuhlfauth T.,
Fock H. P.
Publication year - 1990
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1990.tb00803.x
Subject(s) - greenhouse , growing season , biomass (ecology) , horticulture , hectare , yield (engineering) , chemistry , agronomy , biology , botany , ecology , agriculture , materials science , metallurgy
A versatile method was developed for the application of 1000 ppm CO 2 during the whole growth period of plants. Temperature controlled water cooling and ventilation of the greenhouse resulted in a monthly CO 2 enrichment time of 60 to 90 % of the total light period. Digitalis lanata , grown in greenhouses with CO 2 enrichment during the whole growth phase from April to November, produced twice as much biomass as field cultivated plants. The relative yield of the glycoside digoxin per gram Digitalis drug dry weight was 0.4% in field grown and 0.7% in greenhouse cultivated plants. The production of digoxin per hectare in the greenhouse at 1000 ppm CO 2 was almost 3.5‐fold that by field cultivation. Drug yield and secondary metabolite production in D. lanata were remarkably influenced by increased temperature and elevated CO 2 partial pressure in the greenhouse.