Effect Of Replacing Organic Fertilizer With Organic Fertilizer On Oilseed Growth

The reduction of chemical fertilizers combined with the application of organic fertilizers is an inevitable measure for improving the quality of oilseedseed,increasing the yield of oilseedseed,and realizing green production of oilseedseed in the new era.In this study,the customary fertilization(purified fertilizer)was used as a control,and it was found that 75% customary fertilization(25% reduction in chemical fertilizer)was combined with 0-4500 kg / hm2 organic fertilizer for nutrient absorption,dry matter accumulation and yield formation The effect of the above provides a theoretical basis for guiding the rational fertilization of oilseed.The main conclusions are as follows:1.A 25% reduction in chemical fertilizers combined with the application of 1125-4500 kg / hm2 organic fertilizer can significantly increase the yield of oilseedseed,and with the increase in the amount of organic fertilizer,the output also increases,compared with customary fertilization,the increase in yield is 25.2% ～78.5%,which is reduced with chemical fertilizer Compared with the amount of 25% without organic fertilizer treatment,the yield increase ranged from 43.9% to 105.1%.The reduction of chemical fertilizer by 25% is not suitable for organic fertilizer treatment,and its yield is lower than that of conventional fertilization,but the difference has not reached a significant level.According to the calculation of the linear regression equation between the amount of organic fertilizer and the yield,after the chemical fertilizer is reduced by 25%,only the application of 675 kg / hm2 of organic fertilizer can make up for the loss of yield caused by the reduction of chemical fertilizer.2.From the perspective of planting density and yield components,the application of organic fertilizer on the density has no obvious effect.In all treatments,the density of customary fertilization is the largest.When the fertilizer is reduced by 25%,the density is lower than that of organic fertilizer Customized fertilization,but the density of only 4500 kg / hm2 organic fertilizer treatment was significantly lower than that of customary fertilization,and the remaining differences were not significant;the reduction of chemical fertilizer by 25% combined with the application of organic fertilizer significantly increased the number of anchovies in oil menu plants,compared with conventional fertilization The range is 48.5% ～158.3%,which is 50.9%-162.5% compared with the 25% reduction of chemical fertilizer without organic fertilizer treatment.When combined with organic fertilizer,the 1000-grain weight and the number of kernels per corner also increased,but they did not reach a significant level.3.A 25% reduction in chemical fertilizers combined with organic fertilizer can significantly increase the plant height,main inflorescence length and number of first-level branches of oilseedseed at flowering stage.With the increase in the amount of organic fertilizer,the increase is greater,while the customary fertilization and chemical fertilizer reduction is 25% The differences in plant height,main inflorescence length and number of primary branches in the flowering stage of the treatment were small.4.A 25% reduction in chemical fertilizers combined with organic fertilizers can significantly increase the SPAD value of oilseedseed leaves,and it also shows that the amount of organic fertilizer increases with a greater increase.However,the difference in leaf SPAD values between the customary fertilization treatment and the 25% fertilizer reduction treatment was small.5.The reduction of chemical fertilizer by 25% and the application of organic fertilizer can significantly increase the absorption and accumulation of N,P,and K nutrients in oilseedseed,thereby increasing the apparent utilization rate of fertilizer,but the physiological utilization rate of fertilizer decreases;Increased when the dosage is low,and decreased when the dosage of organic fertilizer is high;the results of separate calculation and total calculation of the partial productivity of fertilizers are different for nitrogen,phosphorus,and potassium fertilizers.The partial productivity of the total potassium fertilizer changed little.6.Combined application of organic fertilizer increases the total revenue and also increases the cost.Therefore,the increase in the amount of organic fertilizer is not enough to make up for the cost of fertilizer.Therefore,the treatment with the best economic benefit in this experiment is a 25% reduction in chemical fertilizer combined with the application of 1125 kg / hm2 organic fertilizer.This treatment can increase the income by 860 yuan / hm2 compared to the conventional fertilizer treatment.