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

Titre : Studies on the use of natural materials in the reclamation of sandy soil /

Auteur : Abdrabou, Hassnaa Abd El-Maqsoud Ali.

Etablissement de soutenance : Mansoura University

Grade : Master in Agricultural Sciences (Soil Science) 2022

Résumé partiel
Currently, the Egyptian government is working hard to encourage and motivate citizens to reclamation the desert soils. So, a pot experiment was carried out aiming at evaluating the effect of some organic fertilizers as main factor i.e., compost, chicken manure and town refuse at different rates (0.0, 10.0 and 15.0 Mg fed-1) as sub main factor as well as bentonite amendment at different rates (0.0, 10.0 and 15.0 Mg fed-1) as sub-sub main factor on the performance of lettuce plants grown on sandy soil. Lettuce growth criteria and concentrations of nutrients in plant tissues as well as some soil properties were measured at harvest stage. The results obtained could be summarized as follows :- 1. Growth criteria of lettuce plants. Except No. of leaves plant-1 which were non-significantly affected due to the type of organic manure, the lettuce plants treated with compost had the highest values of all studied growth criteria i.e., plant height (cm), plant fresh and dry weights (g plant-1), head diameter (cm) and root length (cm) under sandy soil conditions followed by that treated with chicken plant fresh and dry weights (g plant-1), head diameter (cm) and root length (cm) under sandy soil conditions followed by that treated with chicken manure, while lettuce plants treated with town refuse possessed the lowest values at harvest stage of lettuce plants. Concerning the studied levels of organic amendments, it can be noticed that the values of all aforementioned growth criteria increased as the added rate of the studied organic amendment increased. Regarding the bentonite amendment, the soil addition of bentonite had a positive effect on lettuce plant performance compared to the corresponding plants grown without soil addition of bentonite (control treatment), where the values of all growth criteria increased as the added rate of the bentonite amendment increased. 2. Chemical constituents in leaves of lettuce plants (quality parameters). The lettuce plants grown on sandy soil amended by compost had the highest values of N, P, K (%), Fe, Mn (mg kg-1) and DM (%), while the lettuce plants grown on sandy soil amended by chicken manure came in the second order for all aforementioned traits, whilst the lettuce plants grown on sandy soil amended by town refuse possessed the lowest values. As for the studied levels of organic amendments, the sequence order of studied levels from the most effective to the less was as follows ; 15.0 Mg fed-1 > 10.0 Mg fed-1> control (without soil addition). Data again indicated positive responses for bentonite conditioner particularly with high-added level (15.0Mg fed-1) compared to control treatment (without soil addition. In other words, the sequence order of studied levels of bentonite amendment from the most effective to the less was as follows ; 15.0 Mg fed-1 > 10.0 Mg fed-1> control (without soil addition of bentonite). 3. Soil post-harvest analyses. 3. 1. Nutrients content. The values of available nutrients (N, P, K, Fe and Mn, mg kg-1) in the studied sandy soil after harvest of lettuce plants generally increase due to all soil additions of organic amendments at all studied different rates

Présentation étendue (EULC)