Effects of Humic Acid Compound Fertilizers on the Growth,Yield and Quality of Celery
In order to determine the appropriate content of humic acid in high-tower humic acid compound fertilizer applied to celery,"four seasons parsley"was used as test material and a pot experiment was conducted to study the effects of high-tower compound fertilizer with different humic acid contents on the growth,yield and quality of celery.The results showed that,compared to the non-fertilized treatment,the fertilized treatment could significantly increase the plant height,number of branches per plant,yield,and quality of celery.The yield was increased by 39.24～44.12 g/plant(93.34%～104.9%),the number of branches per plant was increased by 1.1～3.4 per plant,the Vc content was increased by 22.2～40.4 mg/kg,and the soluble sugar content was increased by 0.58%～1.43%.High-tower compound fertilizers with humic acid contents of≥2%were better than conventional fertilizers,which increased significantly the number of branches and yield of celery,and improved the quality traits to a certain extent.The yield was increased by 2.84～4.88 g/plant,and the yield was increased in the range of 3.49%～6.00%,the number of branches per plant was increased by 1.4～2.3 per plant,the Vc content was increased by 12.1～18.2 mg/kg,the soluble sugar was increased by 0.23%～0.85%,and the nitrate content was decreased by 23.8～31.4 mg/kg,and the effects was increased with the increase of humic acid content.
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