Effects of wet compost of macadamia nut peel on tea garden soil nutrient and tea quality

【Objective】 To explore the utilization of macadamia nut peel in the field of fertilizer and its impact on the soil nutrient and yield and quality of tea garden, and provide reference for improving the soil nutritional status of tea garden and improving the yield and quality of tea garden.【Method】 The macadamia nut peel were fermented into fertilizer and applied on tea orchard. Using conventional fertilizer as control, testing the application patterns of different fertilizer reductions(20%, 40% and 60% reduction) combined with increased application of fermented fertilizer of macadamia nut peel(15000, 22500 and 30000 kg/ha), and invested its effect on soil fertility, tea yield and quality.【Result】 The experimental group which was reduced 20% chemical fertilizer and add 15000-30000 kg/ha macadamia husk fertilizer, and the experimental group with a 40% reduction in fertilizer applied an additional 30000 kg/ha of macadamia husk fertilizer could both increase the pH of soil, making it suitable for tea tree growth. At the same time, tea yield related indicators(the weigh of one hundred tea bud, thickness of tea bud and area yield) and tea quality related indexes(tea polyphenols, caffeine, amino acids, catechins, water extract) were significantly higher than the control group(P<0.05). In the experimental group with a 60% reduction in fertilizer application, even with the addition of macadamia nut peel fermentation fertilizer, the soil and tea yield and quality of the tea garden were adversely affected.【Conclusion】 The fertilization mode that reduces fertilizer application by 20% and simultaneously increases macadamia nut peel fertilizer by no less than 15000 kg/ha and reduces fertilizer application by 40% and simultaneously increases macadamia nut peel fertilizer by 30000 kg/ha can be promoted for tea plantation.