Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Effect of organic and inorganic fertilizers on yield and quality of onion

Auteur : Yousef, Shadia Bastarous Dawod.

Etablissement de soutenance : Zagazig University

Grade : Master of Science (MS) 2000

Résumé partiel
The present work was carried out in the Desert Research Center, Maryout Research Station under calcareous soil conditions during the growing seasons of 1997-1998 and 1998-1999. The aim of this investigation study the effect of organic and mineral fertilizers on growth, yield and its components and chemical composition of Giza 20 onion cultivar .The experiment included twenty treatments resulted from the interaction of 5 organic manures rates and 4 levels of compound fertilizer (NPK) As follows. (A) Organic manure treatments were : 1- Control (without any addition) 2- FYM at rates of 10 and 20 ton per faddan added to the soil before planting. 3- TR at rate of 10 and 20 ton per faddan added to the soil before planting. (B) NPK fertilizers levels were : 1- Control (without any addition) 2- NPK1 (40N : 30 P20s : 50 K20)kg/fad. 3- NPK2 (60N : 45 P205 : 75 K20)kg/fad. 4- NPK3 (80N : 60 P20S : 100 K20)kg/fad. (C) The interaction treatments between organic manures arid chemical fertilizers treatments. Nitrogen, Phosphorus and Potassium were added in the ”orin of ammonium sulphate (21.5%N), Calcium superphosphate (15% P20S) and Potassium sulphate (48% K20), respectively.A split plot design with four replicates was adopted. The different rates of organic manure were arranged in the main plots while the levels of compound (N, P and K ) fertilizers were distributed randomly in the sub- plots Obtained results could be illustrated as follows : 1- Vegetative growth characteristics :- I I-Organic manure treatments exhibited, significant increase in growth parameters, during periodical samples of onion plants when compared with control treatment. The highest values of growth characters obtained from plants received town refuse treatments (10 and 20 t/fad.) The treatments had no significant effect on neck diameter and bulbing ratio of bulbs.

Présentation étendue (EULC)