The combined effect of mineral n, organic and bio-fertilizers on wheat productivity

Abstract

Two field experiments were carried out at The Experimental Farm, faculty of Agricultural at Dar El Ramed, Fayoum University, Egypt, during two winter seasons of 2015/2016 and 2016/2017. The objectives of experiments were to assess the effect of replacing part of chemical N fertilizers through the organic, bio, and foliar application of organic stimulants on growth parameters (fresh weight of shoots per plant (g), fresh weight of roots per plant (g), dry weight of shoots per plant (g), dry weight of roots per plant (g), Plant height (cm) and chemical composition (plant pigments), macro elements content and enzymatic activities (dehydrogenase activity (μg TPF/ g dry soil/ day) & Nitrogenase activity (μ mole C2H4 / g rhizosphere /h)}, of wheat plants (Triticum aestivum L.) cv. Sids12. The experiment comprising eleven treatments in three replications was laid out in a randomized block design. Results indicated that, wheat growth criteria (fresh weight of shoots per plant (g), fresh weight of roots per plant (g), dry weight of shoots per plant (g), dry weight of roots per plant (g), Plant height (cm), chlorophyll content of leaves, N, P, and K uptakes in the flag leaf of wheat plants with all treatments receiving bio-fertilizer + 50% N-compost + 50% N-mineral treatment showed the highest significant increase in growth criteria followed by 50% N-mineral +50%N-compost + foliar application of mix organic acids. Combined inoculation of mixture bio-fertilizers with 50% N-mineral +50%N-compost (T9) gave the highest nitrogenase and dehydrogenase activities in the rhizosphere as well as the macronutrient uptakes in the flag leaf of wheat plants. The highest significant increases for all growth characters and yield components of wheat plants were also recorded by the same treatment (T9). It could be concluded that there is a possibility of using microbial inoculations (Azotobacter and Azospirillium) with the addition of organic manure to soil in order to reduce the amount of mineral fertilizers and to produce a good yield and quality of wheat in addition to improve the biological properties of the soils.

The Reaction of Maize and Sorghum to Fertilization with Granulated Fertilizer Obtained from Digestate

“…Both Muhammad et al [18] and Radwan et al [19] have shown that a combination of mineral and organic nitrogen fertilisation gives better results than applying the whole rate in one form. This is due to improved soil water properties, increased nutrient availability and the immobilisation of some micronutrients.…”

“…As the authors showed, the reason for the higher grain yield of maize receiving both organic and mineral N in different proportions may be due to the improvement in soil water content, more nutrient availability, and more microbial activities. Radwan et al [19] indicated that the combined use of organic and inorganic N increased N uptake by crops. Such a fertilisation system may provide a balance between micro-and macronutrients.…”

“…Such a fertilisation system may provide a balance between micro-and macronutrients. It can also enhance the availability of plant nutrients, which would help to enhance the metabolic activity of microorganisms and improve plant growth [19].…”

Impact of Nitrogen and Organic Sources with and without Beneficial Microbes on Wheat Crop

“…C ereal crops have been the backbone of national agriculture for decades, as they are major staple food crops with more area under cultivation than other crops (Farhad et al, 2009). The agricultural policy's main goal is to increase wheat crop production by applying beneficial microbes (BM) (Radwan et al, 2021). Wheat was chosen as the experimental crop because it is the most widely grown cereal grain crop on the planet earth (Muhamed et al, 2022;Jagshoran et al, 2004) and is an important major staple food crop in the world (Achari et al, 2021).…”

“…Plants absorb nitrogen in the form of NH + 4 and NO -3 (Atkinson et al, 2007). It is an imperative element for proper growth and development of the plant enhance yield and improve quality by playing a key role in the physiochemical functions of the plant (Radwan et al, 2021), but excessive use of chemical fertilizers in agricultural systems can have a detrimental impact on surface water, ground water, and the atmosphere due to nitrogen (N) leaching, runoff, and volatilization (Achari et al, 2021;Galloway et al, 2008). Organic manures are key to enhancing soil quality and crop yield since they perform numerous functions in agro-ecosystems (Achari et al, 2021;Jones et al, 2007).…”