有机肥部分替代化肥对安化茶园茶叶产量与品质的影响OA

To investigate the effects of partially replacing chemical fertilizers with organic fertilizers on the yield and quality of tea produced in Anhua tea gardens,this experiment used 6-year-old tea tree species Zhuyeqi as the test material.The study analyzed the economic traits,yield,quality,and soil nutrient conditions of tea leaves under different proportions of organic fertilizers replacing chemical fertilizers(treatment 1,no nitrogen fertilizer applied;treatment 2,applied organic nitrogen fertilizer;treatment 3,applied 1/3 organic nitrogen fertilizer+2/3 chemical nitrogen fertilizer;treatment 4,applied 1/2 organic nitrogen fertilizer+1/2 chemical nitrogen fertilizer;treatment 5,applied 2/3 organic nitrogen fertilizer+1/3 chemical nitrogen fertilizer;treatment 6,applied inorganic nitrogen fertilizer).The results showed that the number of tea buds,average bud weight,average bud length,leaf length,leaf width,and the number of single bud leaves in treatment 5 were all higher,being 113.8 buds/m2,1.46 g,13.90 cm,3.99 cm,1.70 cm,and 3.41 leaves respectively;the yield of fresh leaves in treatment 5 was the highest,at 1 116.32 kg/667 m2;the tea water extract content of treatment 5 was the highest(41.25%),while the amino acid content of treatment 4 was the highest(4.19%).In terms of soil physical and chemical properties,the soil in treatment 5 had the highest contents of total nitrogen(1.89 g/kg)and available phosphorus(31.87 mg/kg).In conclusion,the optimal nitrogen application pattern for tea gardens is 2/3 organic nitrogen fertilizer+1/3 chemical nitrogen fertilizer.This approach can effectively improve the growth and development of tea plants,the physical and chemical properties of the tea garden soil,and enhance the quality of tea leaves.It can be further widely promoted and applied.