為探究磷肥減量施用以及配施鋅肥對平和縣琯溪蜜柚果實產量和品質的影響，以平和地區白肉琯溪蜜柚為試驗材料，試驗設置6個處理：磷減量70%不施鋅肥、磷減量70%施鋅肥、磷減量35%不施鋅肥、磷減量35%施鋅肥、磷習慣用量不施鋅肥、磷習慣用量施鋅肥。結果表明：磷肥減量可提高果實產量和改善果實品質，磷肥減量35%時果實產量顯著升高，且能顯著降低單果重、果皮厚，增加維生素C、固酸比等指標；磷肥減量35%配施鋅肥可顯著提高果實產量、綜合品質得分、果實出汁率、含水率和維生素C含量。田間試驗結果顯示，平和琯溪蜜柚園磷肥可減量35%，磷肥減量35%配施鋅肥具有顯著增產和提升果實品質的效果，即磷肥(P2O5)0.85 kg/(plant·a)、2次噴施0.2%鋅肥（ZnSO4·7H2O）40 g/(plant·a)。
To investigate the effects of phosphate fertilizer reduction and zinc fertilizer application on the yield and quality of Guanxi pomelo in Pinghe County, the white flesh Guanxi pomelo in Pinghe area was used as the test material, and six treatments were set up including: 70% reduction in phosphorus combined without zinc fertilizer, 70% reduction in phosphorus combined with zinc fertilizer, 35% reduction in phosphorus combined without zinc fertilizer, 35% reduction in phosphorus combined with zinc fertilizer, the habitual amount of phosphorus combined without zinc fertilizer, the habitual amount of phosphorus combined with zinc fertilizer. Results showed that reducing the amount of phosphate fertilizer can increase fruit yield and improve fruit quality. When phosphate fertilizer is reduced by 35%, the fruit yield will increase significantly, and it can significantly reduce the weight of single fruit and thick skin, increase vitamin C, solid-acid ratio and other indicators; 35% reduction in phosphorus combined with zinc fertilizer can significantly increase fruit yield, comprehensive quality score, fruit juice rate, water content and vitamin C content. Field test results showed that Phosphate fertilizer can be reduced by 35% in Pinghe Guanxi pomelo orchard., Phosphate fertilizer reduction by 35% combined with zinc fertilizer can significantly increase yield and improve fruit quality, it was phosphate fertilizer (P2O5) 0.85 kg/(plant·a), two sprays of 0.2% zinc fertilizer (ZnSO4·7H2O) 40 g/( plant·a).