Impact of Varying Substitution Rates of Cattle and Sheep Manure on Oat Forage Yield and Soil Fertility
[Objective]This study aimed to investigate the optimal use of cattle and sheep manure in oat production and to evaluate its practical effects on yield and soil fertility.[Method]We established twelve experimental levels involving single applications of chemical fertilizer,cow manure,and sheep manure,as well as mixed applications of cow manure and sheep manure with chemical fertilizer.Variance and signifi-cance analyses were conducted on oat yield,nutrient uptake,and the physical and chemical properties of soil.[Result]Fertilization treatments significantly influenced oat yield.Chemical fertilizer application markedly increased yield,while the use of sheep manure,and its substitution for chemical fertilizer,moderately boosted yield.Different fertilization combinations had varying impacts on the uptake of nitro-gen,phosphorus,and potassium by oats.Additionally,the accumulation of heavy metals showed com-plex relationships affected by the fertilization treatments.Soil property studies indicated that treatments significantly affected soil pH,total potassium,and ammonium nitrogen level.[Conclusion]Among all fertilization treatments,the single application of sheep manure and its combination with chemical fertil-izer significantly enhanced oat growth and production.These treatments also increased soil pH and ammo-nium nitrogen content.Using sheep manure as a substitute for chemical fertilizer is an effective strategy for maintaining crop yields while reducing chemical fertilizer use.
oat yieldsoil fertilityorganic fertilizerscow and sheep manuresustainable agriculture
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