Effects of Phosphate Fertilizer Application Rate on Celery Yield,Phosphorus Absorption and Utilization in Mountainous Area of Southern Ningxia
This study aims to clarify the suitable fertilization amount for celery cultivation and reduce the negative impact of unreasonable fertilization,providing a theoretical reference for the high-yield and high-profit cultivation of celery in the mountainous area of southern Ningxia.Using the celery va-riety'Queen'as experimental material,a single-factor randomized block design was adopted with five fertilization levels.The effect of different amount of phosphate fertilizer on celery yield,nutrient accu-mulation,allocation,and phosphorus fertilizer utilization rate were investigated.The results showed that application of phosphate fertilizer led to an increase in celery yield ranging from 6.06％-22.22％compared to the control group.Further analysis indicated that the optimal phosphate fertilizer applica-tion rate for maximizing celery yield was between 165.98-172.11 kg/hm2.Additionally,the phos-phorus fertilizer application rate that yielded the best economic benefit was determined to be between 142.80 and 148.93 kg/hm2.Furthermore,as the amount of phosphate fertilizer increased,the quality of celery showed a significant increasing trend,however,the partial productivity of phosphorus and the agronomic efficiency of phosphorus exhibited a significant decreasing trend.The utilization rate of phosphate fertilizer ranged from 18.13％to 36.33％,and the contribution rate varied from 6.16％-15.51％,The treatment of phosphate fertilizer amount 150 kg/hm2 exhibited the highest values,sig-nificantly surpassing those of the control group.When the amount of phosphate fertilizer reached 150 kg/hm2,the surplus of phosphate fertilizer changed from negative to positive.When the amount of phosphate fertilizer reached 225 kg/hm2,the phosphorus output decreased,and the apparent balance of phosphorus showed surplus.The principal component analysis showed that phosphate fertilizer amount 150 kg/hm2 treatment was the optimal fertilization level.In summary,the appropriate phos-phorus fertilizer application rate for celery in the mountainous area of southern Ningxia is 142.80-172.11 kg/hm2.
万方数据
维普
