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

Accueil du site → Doctorat → Egypte → Impact of Nanofertilizers on Soil Health and Plant Growth

Minia University (2019)

Impact of Nanofertilizers on Soil Health and Plant Growth

Marwa Salah Mohammed Hussien

Titre : Impact of Nanofertilizers on Soil Health and Plant Growth

Auteur :

Etablissement de soutenance : Minia University

Grade : Doctor of Philosophy (PhD) in Agriculture Sciences 2019

Résumé
5.1 Research aim and objectives This research scientific aim was to assess impacts of using NPK nanofertilizers instead of NPK non-nanofertilizers on potatoes quality, productivity, nutrients use efficiency and soil health under field and laboratory conditions. Therefore, a practicable and economically feasible options can be made to the Egyptian farmers for maintaining sustainable agriculture through improved soil health and crop production and quality and increased nutrients use efficiency in potato crop farming systems. The following stipulated objectives were conducted to achieve this aim : 1- To determine the optimum application rates for NPK nanofertilizers compared to recommended levels of NPK non-nanofertilizers for better potatoes growth and crop yield. 2- To investigate the effects of NPK nanofertilizers in various rates compared to recommended levels of NPK non-nanofertilizers on potatoes crop yield and quality. 3- To determine the effects of optimum application rates for NPK nanofertilizers compared to NPK non-nanofertilizers on relative nutrient use efficiency and relative economics of potato cultivation. 4- To study the effects of NPK nanofertilizers in various rates integrated or not with organic fertilizers compared to recommended levels of NPK non-nanofertilizers on soil health and some soil biochemical and biological properties. 5.2 Research Methodology Field and incubation laboratory studies were achieved for two years in the period from 15 January 2016 to 25 December 2017, at the facilities of Faculty of Agriculture, Minia University. Under field and laboratory conditions, soil health and potatoes crop yield and quality as well as fate and use efficiency of total NPK from non-nanofertilizers (conventional chemical fertilizers) and NPK nanofertilizers applied to clay soil on conjunction or not with organic fertilizers were studied. 5.2.1 Field experiment Field experiments were conducted for two seasons (2016 and 2017) at Research Farm facilities, Faculty of Agriculture, Minia University, Egypt, in order to study effects of NPK nanofertilizers compared to NPK non-nanofertilizers on yield and yield components of potato crop (Solanum tuberosum L.) and to estimate whether NPK nanofertilizers applied in equivalent or lower rates could replace recommended levels of NPK chemical fertilizers in potato farming systems without retrograde effects upon yield production or quality. Experiments were laid out in a factorial design based on complete randomized block design (CRBD) with eight treatments and three replicates. Impacts of recommended rates of NPK chemical fertilizers (control treatments) compared to NPK nanofertilizers in equivalent or lower rates (100%, 50% and 25%), foliar or soil applied on potato productivity and quality were studied. Under field conditions, potato crop yield and quality as well as fate and use efficiency of total NPK from non-nanofertilizers (conventional chemical fertilizers) and NPK nanofertilizers applied to clay soil were studied. 5.2.2 Incubation experiment Incubation experiment was conducted to determine temporary impacts of different fertilization systems on some labile soil biochemical and biological properties following potato monocropping under arid conditions. Field experiment followed by soil incubation was conducted at the experimental farm facilities, Faculty of Agriculture, Minia University, Egypt, in order to study effects of different fertilization systems on biochemical and biological soil properties after incubation for 10 days, as sensitive indicators of soil health after monocropping cultivation of potato crop. 5.3 Research conclusions

Présentation étendue (EULC)

Page publiée le 15 décembre 2020