Abstract: Both organic and mineral fertilizer at different ratios were applied to Guanxi honey pomelo orchard during 1995~1998, and their effects on juice sac granulation and dehiscent segments of fruit, yield and soil nutrients were studied. The results showed that compared with the sole mineral fertilizer, applying the combined organic fertilizer and mineral fertilizer effectively reduced the granulation of fruit, greatly increased the content of organic matter in soil and favored to improve the quality of fruit. Furthermore, mineral fertilizer combined with 50% organic fertilizer also significantly increased the yield of fruit. It was found that through balanced fertilization, a high yield of Guanxi honey pomelo fruit was achieved every year, and higher level of soil fertility and plant nutrition was held, while the granulation of fruit tended to decrease year by year. It is suggested that the annual application of 1.5kg N(with the organic forms from 30% to 50%) added with 1.0~1.5kg lime is available to a plant with 100kg yield of fruit in a red orchard, and its element proportion is:1.00:0.50~0.60:1.00-1.05:100~130:0.28.

Key words: organic-mineral fertilizer ratio, Guanxi honey pomelo, granulation, yield, nutrition in soil and leaf

摘要： 本研究探讨有机一无机肥不同配比对溪蜜柚果实粒化、裂瓣症、产量、土壤养分含量等的影响。结果表明,与单施无机肥相比,配施有机肥可有效地降低果实粒化程度,较大幅度提高土壤有机质含量,并有助于改善果实品质。其中,配施50%有机肥的处理还可明显提高产量。试验还表叽经平衡施肥,果园年年获得高产,并保持较高的土壤肥力和树体营养水平;同时,果实粒化程度呈逐年减轻趋势。作者推荐,林产100kg的红壤抽回;年株施纯氮1.5kg左右(有机氮占全氮量30%-50%)。石灰1.0-1.5kg.其元素比例N:P₂O₅:K₂O:CaO:MgO为1.00:0.50~0.60:1.00~1.05:1.00-1.36:0.28。

关键词: 有机-无机肥配比, 琯溪蜜柚, 粒化, 产量, 土壤及叶片营养