INFLUENCE OF IRRIGATION INTERVALS AND CHEMICAL FERTILIZATION ON SENNA (Cassia acutifolia, Delil~\) PLANTS: II.EFFECT ON CHEMICAL COMPOSITION AND PRODUCTION OF ACTIVE CONSTITUENTS | ||||
| Journal of Plant Production | ||||
| Article 10, Volume 28, Issue 12, December 2003, Page 8381-8397 PDF (834.35 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2003.246341 | ||||
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| Authors | ||||
| A. S. EI-Leithy,1; H. A. Mansour1; Effat I. EI-Maadawy1; K. A. Hammam2 | ||||
| 1Ornamental Horticulture Deoartment, Faculty of Agriculture, Cairo University. | ||||
| 2MedIcinal and Aromatic Plant Research Department, Hortlcultu'le Research Institute, AgrIcultural Research Center, Dokky, Cairo, Egypt. | ||||
| Abstract | ||||
| Thi-; study was conducted a\ the Department of Ornamental Horticultur~. Faculty of Agriculture Cairo University. Giza, and the Fann 01 Medicinal and AromatiC Plants. Faculty of Pharmacy, Cairo University. Giza. during the two sl)CcesSiV~ seasoos of 1997 ana 1996. with tl1e aim of investigating the effect of irrigatio~ intervals and chemical NPI< fertilization on the chemical composition and production of active constituents in senna (Cassia aculi'1Olia. Delile) plants. Cassia aculifolia were irrigated every 1. :2 or 3 weeks. and were supplied with chemical NPK fertilization :.Jsing combinations 01 N al the rates of 0, 25. 50 or 75 kglfed. (No. N1, N2 and N3, respecfively), P,Os at 0, 25 or 50 kg/fed. (Po. Pl and pzi respectively) and I< at 25 kglfed. (1<1). In addition, plants receiving no Chemica fertilization (NoPo~) were used as the centrol.! The percentages of sennoside B in the leaves and pods were generally higher than those of sennoside A. and the percentages of both sennosldes were higher in the pods than in the leaves. Irrigation every 3 weeks gave Ihe highest means for ~ercentages of tolal sennosides in leaves and pods, sennosides yielQ rrom leaves/plant. and percentages ot sen nos ides A and B in glycosides extracted from leaves and pods, whereas irrigation every 2 weeks gave the highest sennosldes yield trom pods/plant and the highest total sennostdes yield (from leaves + podr.)lplant, 8S well as the highest percentages 01 N, P and I< in the leaves and stems. On the other hand, the highest contents of leaf pigmenls (chlorophyll a, band carotenoids) were obtained with weekly irrigation, In seneral, the difterent fertilization treatments decreased the total percentages of sennosldes, as well as the percentages of sennosides A and 8 in leaves and pees, but increased the sennosides yield from leaves/plant and podslptant (with NZP2K1 giving the highest values). the leaf pigments con lent , as well as the N, Pend K contents in leaves and stems (with NJP2K1 giving the highest values for these characteristics). For each of Ihe different characteristics that were studi~. lhe highesl values wele obtained when the best irrigation interval for the studied characteristic was combined wilh using the best fertilization treatment. | ||||
| Keywords | ||||
| Senna. Cassia ecutitoti«; fertilization; NPK; irrigation intervals. sennoside; chlorophyll. carotenoids; nutrients | ||||
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