施用土壤调理剂对强酸性蜜柚果园土壤及蜜柚产量和品质的影响

Effects of the Application of Soil Conditioner on the Amelioration of Strongly Acidic Soilin Pomelo Orchard and the Yield and Quality of Pomelo

为改良平和县强酸性蜜柚果园土壤,针对蜜柚开展土壤调理剂试验,研究不同施用量土壤调理剂对强酸性蜜柚果园土壤改良及蜜柚产量和品质的影响,明确土壤调理剂合适施用量,为平和县蜜柚果园土壤改良、合理施肥等提供理论依据和参考。结果表明:施用土壤调理剂能使土壤pH增加2.27%~29.55%,土壤交换性酸下降15.8%~79.8%,土壤交换性盐基不同程度增加,并显著降低有效铬和有效汞含量(P<0.05)。施用土壤调理剂3000 kg·hm^(-2)时,能使蜜柚果实维生素C含量显著提高24.86%,可滴定酸含量显著降低14.24%,改善蜜柚果实品质,并使蜜柚可食率和产量分别显著提升2.84%和5.30%(P<0.05),为强酸性蜜柚果园土壤改良的经济施用量。

In order to improve the strongly acidic soil in pomelo orchard of Pinghe County,the soil conditioner experiment was carried out to study the effects of different application amounts of soil conditioner on the amelioration of strongly acidic soil in pomelo orchard,and the yield and quality of pomelo,and also the appropriate application amount of soil conditioner was clarified,in order to provide theoretical basis and reference for the soil improvement and rational fertilization of pomelo orchard in Pinghe County.The results showed that the application of soil conditioner could increase the soil pH by 2.27%-29.55%,decrease the soil exchangeable acid by 15.8%-79.8%,increase the soil exchangeable base in different degrees,and significantly reduce the contents of effective chrome and effective mercury(P<0.05).When the soil conditioner was applied at 3000 kg·hm^(-2),the vitamin C content of pomelo fruit could be significantly increased by 24.86%,and the titratable acid content could be significantly decreased by 14.24%,so the quality of pomelo fruit would be improved.Meanwhile,the edible rate and yield of pomelo were significantly increased by 2.84%and 5.30%,respectively(P<0.05).Therefore,it was the economic application amount for the amelioration of strongly acidic soil in pomelo orchard.