SELECTING THE OPTIMUM AMOUNT OF ORGANIC, MINERAL AND BIOFERTILIZERS RESPONSIBLE FOR MAXIMIZING THE PRODUCTIVITY OF BALADY GUAVA TREES | ||||
| Fayoum Journal of Agricultural Research and Development | ||||
| Article 11, Volume 21, Issue 2, July 2007, Page 225-236 PDF (359.9 K) | ||||
| Document Type: Research articles. | ||||
| DOI: 10.21608/fjard.2007.197560 | ||||
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| Author | ||||
| Abd El-Azez, S. El Khawaga | ||||
| Hort. Dept., Fac. Agric., South valley University, Egypt. | ||||
| Abstract | ||||
| The effect of supplying Balady guava trees with N at 400 g/tree from mineral source, filter cake mud and Bio Azotene in various percentages on leaf area, total chlorophylls, total carbohydrates, percentages of N, P, K and Mg, yield and fruit quality was studied during 2004 and 2005 seasons. Nitrogen at the fixed rate namely 400 g/tree was applied either completely from mineral (ammonium sulphate), filter cake mud (2% N) and Bio Azotene sources or in various proportions of each. Results showed that combined application with N through mineral, filter cake mud and Bio Azotene was effective in improving leaf area, total chlorophylls, total carbohydrates, percentages of N, P, K and Mg in the leaves, yield and fruit quality compared to using each source lower than 50% out of the recommended N. Application of N completely via organic or biofertilizer form caused a reduction in the above-mentioned traits compared to using N completely via mineral source. Application of Bio Azotene alone was favourable than using filter cake mud in this connection. Generally, fertilizing Balady guava trees with N at 400 g/tree in the form of 972 g ammonium sulphate + 5.0 kg filter cake mud + 12.5g Bio Azotene/ tree gave satisfactory promoted yield and fruit quality of guava trees. | ||||
| Keywords | ||||
| Guava trees; mineral fertilization; ammonium sulphate; Organic fertilization filter cake mud and Biofertilization (Bio Azotene) | ||||
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