蕉柑硫酸钾镁肥配施效应研究

在土壤速效钾中等、有效镁含量缺乏的蕉柑果园,设置硫酸钾镁不同配施用量处理(每667m~2施20.7、41.4、62.1、82.8kg),研究不同硫酸钾镁肥用量配施对蕉柑叶片养分含量、农艺性状、果实品质、产量和种植效益的影响。结果表明,蕉柑配施硫酸钾镁肥,其叶片钾、镁含量分别提高0.04～0.11、0.04～0.08个百分点,单株结果数增加7.8～27.5个,蕉柑维生素C含量每100g显著提高1.16～4.63mg,每667m~2产量提高106.5～478.5kg,增产4.3%～19.5%,种植效益提高7.0%～33.6%。其中每667m~2配施硫酸钾镁肥62.1kg,果实单果重最重,单株结果数最多,果实最大,果实维生素C含量最高、有机酸含量最低,获得的产量和种植效益均最高。

Effect of combination of Sulfate-potassium magnesium on Citrus reticulata Blanco cv. tankan

The effects of different rates of sulfate-potassium magnesium fertilizer include 20.7, 41.4, 62.1, 82.8 kg/667 m2 on foliar nutrient content, agronomic characters, fruit quality, yield and planting benefit of Citrus reticulata Blanco cv. tankan under medium K and deficient Mg in soil were studied. The results showed that the application of sulfate-potassium magnesium could increase the foliar content of potassium 0.04 to 0.11 percentage point and magnesium 0.04 to 0.08 percentage point, and increase the number of fruit per plant 7.8 to 27.5. The vitamin C content was increased significantly by 1.16 mg/100g to 4.63 mg/100g, the yield increased by 4.3% to 19.5%, and the benefit increased by 7.0% to 33.6%, respectively. With applying sulfate-potassium magnesium 62.1 kg/667 m2, the single fruit weight was the heaviest, the number of fruit per plant was the most, the fruit was the largest, the content of vitamin C was the highest, the content of organic acid was the lowest, and the yield and the plantation income were the highest.