Effect of organic fertilizers types and levels on yield and quality of potato tubers (Nicola var.) at harvest and during storage [electronic resource].

Includes references.

A field experiment was conducted during successive autumn season (2010 & 2011) at Horticulture Research Station farm at EI-Kanater district and Fruit Handling Research Department, Horticulture Research Institute, Agricultural Research Center (ARC), Giza, Egypt, to study the effect of application of two different organic fertilizers (compost) types and levels on yield, yield component and quality of potato tubers (Nicola var.) at harvest and during storage. There were 7 treatments viz. the recommended NPK minerals fertilizer (control), two types of compost the first one is plant-animal residues(a)and the second is plant residues (b) each type was applied at three levels of nitrogen( 80, 120 and 160 kg N feef') equal used (6, 7), (9, 10.5) and (12, 14) ton feef' from compost a and b, respectively. At harvest (after 110 days), tubers were transported directly to the laboratory where, cured and stored (at room temperature 32±2"C and 65% RH or at 8'C and 4'C and 90:95 % RH). Physical and chemical studies were done monthly for tubers where stored at room temperature and 45 days for cool temperature. The obtained results indicated that, application of high level of organic fertilizers (160 Kg N feef ') in both compost types recorded no significant differences as compared to control treatment at yield (tubers ton fea') as well as NPK content on tUbers. On contrary, Nitrate and Nitrite concentrations in plants received various N-organic fertilizers levels produced in significantly reduce values as compared to treatment received recommended NPK mineral fertilizers(control). These results also, cleared that,

Summary in Arabic.