บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Coal bottom ash and pine wood peelings as root substrates in a circulating nutriculture system.

Woodard, M.A., Bearce, B.C., Cluskey, S. and Townsend, E.C.

HortScience. Volume 28, Number 6, June 1993. Pages 636-638.

1993

บทคัดย่อ

Coal bottom ash and pine wood peelings as root substrates in a circulating nutriculture system.

'Inca Yellow' marigolds (Tagetes erecta L.) were planted in polyethylene bags containing coal bottom ash (CBA), pine wood peelings (PWP), a mixture of 1 CBA:1 PWP (v/v), and loose Grodan rockwool (RW) and grown in a circulating nutriculture system. Three fertigation frequencies of 12, 6, or 4 cycles per 12-hour light period were set with a duration of 5 minutes each. Flower diameters of marigolds grown in CBA, PWP, and CBA-PWP exceeded flower diameters of RW-grown marigolds, and days from planting to harvest were less in CBA and CBA-PWP than in the other two media. There was no interaction between medium and fertigation frequency. Foliar analysis showed no significant differences in plant elemental composition among root media or fertigation frequencies. Postharvest PWP water extracts contained higher P levels than extracts of other media, and CBA-PWP water extracts contained higher K, Ca, and Mg. In the CBA-PWP mixture, decomposition products from PWP may have increased P solubility and solubilized the K, Ca, and Mg in CBA.