POSSIBILITY OF IMPROVING THE GROWTH, YIELD AND SOME CHEMICAL CONSTITUENTS OF TWO LINES OF ROSELLE (Hibiscus sabdariffa, L. ) CULTIVAR SABAHIA 17 PLANTS BY USING CHEMICAL AND ORGANIC FERTILIZATION | ||
| Journal of Plant Production | ||
| Article 17, Volume 32, Issue 3, March 2007, Pages 2115-2132 PDF (839.55 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2007.206729 | ||
| Author | ||
| A. F. Ali* | ||
| Hort. Dept. Fac. of Agric., Al Azhar Univ. Assiut. | ||
| Abstract | ||
| This study was carried out during the two successive seasons of 2004 and 2005 to determine the role of chemical and organic fertilizers in improving of growth, yield and some chemical constituents of two lines (dark and light) of roselle cultivar “Sabahia 17” plants. NPK fertilizers were applied separately or in combination with organic fertilizers, where nitrogen were used at the rates of 0, 33.5 and 67.0 kg N / feddan ( N0, N1 and N2), respectively, phosphorus at the rates of 0, 15.5 and 31.0 kg P2O 5 / feddan (P0, P1 and P2), respectively and potassium at the rates of 0, 18.0 and 36.0 kg K2O / feddan (K0, K1 and K2), respectively, where these amounts are 0, 50 and 100 % NPK of the recommended doses for the three elements, respectively. Also, organic manures ( chicken manure and sheep manure) were applied at the rates of 0, 10 and 20 m3 / feddan for each one. The obtained results revealed that dark line plants gave higher values of branches number, herb dry weight, fruits number, sepals dry yield per plant and / feddan, seed yield per plant and / feddan, anthocyanin %, N, P and K % and uptakes more than light line plants meanwhile, light line plants had more acidity % than those of dark line plants. In regard to chemical and organic manure fertilization, generally, it was found that adding organic manure with NPK led to improve the growth, yield and chemical constituents. The results showed that application of chicken manure achieved better results than those of sheep manure. In most cases, the use of 50 % of the recommended doses of NPK fertilization + the high rate of chicken manure gave values near from 100 % NPK of the recommended doses. Also, the results revealed that the combination of 100 % of the NPK recommended doses + the high rate of chicken manure was the most effective treatment concerning growth, yield and chemical parameters. Concerning the interaction between the two studied factors, in most cases, it had significant effect and the most effective interaction treatment was obtained when receiving dark line plants 100 % of the NPK recommended doses + the high rate of chicken manure. It is worthy to mention that applying the combination of 50 % of the NPK recommended doses plus the high rate of chicken manure where, in some cases, applying of 100 % of the NPK recommended doses + the high rate of chicken manure had no significant increase of the sepals yield production than of 50 % of the NPK recommended doses + the high rate of chicken manure. Therefore, it could be recommended to supply dark line plants with the combination of 50 % of the NPK recommended doses + chicken manure at the high rate to obtain high yield, minimizing the chemical fertilizers, improving soil fertility, as well as, minimizing environmental pollution. | ||
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