عنوان مقاله [English]
Chemical fertilizers are among the resources that can quickly supply nutrients to the plant, but their continued and high consumption poses environmental hazards such as contamination of surface and ground water and enrichment of water. Therefore, it is best to replace some of the fertilizers with organic fertilizers. Due to the lack of organic matter in most soils of Iran, it is necessary to consume a variety of organic materials such as municipal manure and sewage sludge. In order to understand the effect of using sludge on morphological and physiological characteristics of forage maize crop, an experiment was conducted during spring and winter in two seasons in 1976-96 at a farm east of Mashhad at Olang-Altimur refinery. Is. In this study two irrigation treatments with ordinary water (A) and effluent (B) were applied in three replications using chemical fertilizers (S), animal (D) and processed sludge (L). The results showed that the effect of fertilizers application on plant height, stem diameter, corn ear diameter, chlorophyll a, b, t, leaf area and percentage of maize moisture content in water use and wastewater treatments were significant in the first and second crop season. There was a significant difference between treatments at 5% level and a significant difference between treatments at 1% level. There was no significant difference between AS and AD treatments on plant height, stem diameter, ear diameter and leaf chlorophyll, while no significant difference was observed between BL and BD treatments and the highest percentage of weeding.