EFFECT OF ORGANIC AND MINERAL NITROGEN FERTILIZERS ON POTATO CROP | ||
| Journal of Soil Sciences and Agricultural Engineering | ||
| Article 5, Volume 34, Issue 4, April 2009, Pages 4043-4050 PDF (488.29 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jssae.2009.90831 | ||
| Authors | ||
| A. M. El-Ghamry1; R. A. El-Dissoky2; A. M. AbdEl-Hameed3 | ||
| 1Soil Dept., Faculty Agric., Mansoura Univ., Egypt. | ||
| 2Soil Improvement Preservation and Dept., Soil Water and Environ. Res. Inst., Agric. Res. Center, Giza, Egypt. | ||
| 3Plant Nutrition Dept., Soil Water and Environ. Res. Inst., Agric. Res. Center, Giza, Egypt | ||
| Abstract | ||
| A field experiment was conducted on alluvial soil at Dakahlia Governorate, Egypt during the growing season of 2007/2008 to study the effect of organic-N as rice straw compost (three levels 0, 6 and 12 t fed-1), inorganic-N as ammonium nitrate (three rates 60, 120 and 180 kg N fed-1) and their interaction on potato (Solanum tuberosum, L) cultivar Spunta. Organic-N and mineral-N application significantly increased leaves No./plant, plant height and leaf area. While, the interaction effect between organic and mineral N was insignificantly on leaves No./plant and plant height and significantly on leaf area. Fresh tuber yield and dry shoot yield significantly increased with compost and mineral-N application and their interaction. The highest value of fresh tuber yield was 19, 28 t fed-1 with interaction of 180 kg N + 12 t fed-1 compost. Dry matter % in tubers was significantly affected by mineral-N, compost application and their interaction after 70, 90 and 110 days from planting. Protein percent and specific gravity were significantly affected with mineral-N fertilization, but insignificantly affected by compost application. N, P and K % in shoots and tubers dry matter were increased with mineral nitrogen and compost addition and their interaction as compared with control at different periods. | ||
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