Effects of different organic fertilizer substitution ratios on yield,nutrient utilization,and soil properties of highland barley
This study examined the effect of organic fertilizer replacing the chemical fertilizer ratio on barley yield,nutrient utilization,and soil properties to provide a theoretical basis for reducing chemical fertilizer application in barley,increasing yield and efficiency.considering"Kunlun 14"barley as the test material,seven experimental treatments were set up:no fertilization(CK),conventional fertilization(CF),organic fertilizer substitution of 20%(T1),40%(T2),60%(T3),80%(T4),and 100%(T5).The effect of the organic fertilizer substitution ratio on barley yield,dry matter accumulation,nutrient accumulation,fertilizer utilization,soil physicochemical properties,and enzyme activity under equal nutrient inputs was studied.Barley yield,dry matter accumulation,nutrient accumulation,and fertilizer utilization gradually decreased with the increase in the organic fertilizer substitution ratio.T1 treatment significantly increased barley yield,nutrient accumulation,and fertilizer utilization compared with CF.The organic fertilizer replacement treatment increased soil organic matter and nitrate nitrogen content,decreased soil pH and ammonium nitrogen content,and had no significant effect on soil total nitrogen content compared with CF.The T1 treatment increased the soil's available phosphorus and available potassium content compared with CF.Soil urease and alkaline phosphatase activities were significantly increased by 15.76%-19.51%(T1-T3 treatment)and 24.32%-34.25%,respectively,in organic fertilizers replacing chemical fertilizers treatments compared with CF.T1 and T3 treatments were more favorable for soil enzyme activities.The treatments were comprehensively evaluated using principal component analysis,and the scores were ranked as T1＞CF＞T2＞T3＞T4＞T5＞CK.Organic fertilizer replacement of chemical fertilizers can improve soil physical and chemical properties,soil enzyme activity,and the appropriate proportion of organic replacement of conventional fertilization,promoting the barley absorption and utilization of nutrients and improving yields.Organic fertilizer replacement of 20%of the treatment scored the highest for the recommended fertilization mode.
国家科技期刊平台
NSTL
万方数据
