碱性钙镁有机肥对柑橘园土壤肥力和柑橘品质的影响

Effects of Alkaline Calcium and Magnesium Organic Fertilizer on Orchard Soil Fertility and Citrus Quality

针对湖南柑橘园土壤酸化严重,果实品质下降问题,通过设置不施肥(CK)、常规有机肥、碱性钙镁有机肥3个处理,研究了碱性钙镁有机肥对柑橘园土壤养分和果实品质的影响。结果表明:土壤肥力方面,相比常规有机肥,施用碱性钙镁有机肥能有效调节土壤pH值,提升土壤肥力,改善土壤理化性质;果实品质方面,较常规有机肥,施用碱性钙镁有机肥单果重也有显著的增加,总含酸量显著降低,降幅为21.21%,固酸比值上升,果实纵横比值下降,果型更趋合理。这表明碱性钙镁有机肥能明显提高柑橘园土壤肥力,改善柑橘果实品质,增加柑橘商品性。

In view of the serious acidification of soils in Hunan citrus orchards and the decline of fruit quality,our experiment has set three treatments,i.e.,no fertilizer (CK),routine organic fertilizer and alkaline calcium and magnesium organic fertilizer,to study the effects of alkaline calcium and magnesium organic fertilizer on soil nutrients and fruit quality in citrus orchards.The results showed that,compared with routine organic fertilizer,the application of alkaline calcium and magnesium organic fertilizer could effectively adjust soil pH,improve soil fertility,and improve soil physical and chemical properties;meanwhile,the single fruit weight was increased obviously,the total acid content was reduced significantly with a decrease of 21.21%,the TSS/TA ratio increased,the aspect ratio of the fruit decreased,and the fruit shape became more reasonable.In summary,alkaline calcium and magnesium organic fertilizer can significantly improve soil fertility of citrus orchards,improve the quality of citrus fruits,and increase the marketable value of citrus.