Response difference of celery cultivation to nitrogen fertilizer application rate in Liupan Mountain area of Ningxia
In order to solve a series of problems caused by improper application of nitrogen fertilizer in the production process of celery in Liupan Mountain area of Ningxia,the celery variety Queen was used as the test material,and the effects of different nitrogen supply levels(0,150,300,450,600 kg·hm-2)on the yield and quality of celery were studied by single factor and multi-level randomized block design.The results showed that the appropriate amount of nitrogen supply was beneficial for celery to absorb potassium and phosphorus.After the application of nitrogen fertilizer,the plant height,perimeter,petiole length,dry matter accumulation,and yield of celery were significantly increased,with an increase ranging from 15.64％to 33.27％.Through the regression analysis of yield,it was concluded that the highest nitrogen fertil-izer application for celery was 394.75 kg·hm-2,and the optimal economic benefit nitrogen fertilizer application was 287.07 kg·hm-2.In addition,increasing nitrogen fertilizer within a certain range will increase the content of nitrate,crude fiber,vitamin C and soluble solids in celery.TOPSIS method was used to evaluate and analyze several indexes of celery.The results showed that N450 treatment had the highest score and N0 treatment had the lowest score.In summary,in or-der to reduce soil environmental pollution and improve the utilization rate of nitrogen fertilizer,it is recommended that the amount of nitrogen fertilizer should be 287.07-394.75 kg·hm-2 when planting celery in Liupan Mountain area of Ningxia.
万方数据
维普
