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采用上口直径40 cm、下口直径36 cm、高40 cm的塑料容器,栽培基质为珍珠岩的黄金水位无土栽培法,对水果红薯进行了最佳施肥量试验。结果表明,在高效施肥区间,肥料效益达到10倍,施肥量每增加100 g,生物产量增加1 085 g、水果红薯重增加640 g。在中效施肥区间,肥料效益为5~6倍,施肥量每增加100 g,生物产量增加493~605 g、水果红薯重增加640 g。在低效施肥区间,肥料效益只有2~3倍,施肥量每增加100 g,生物产量仅增加268~314 g、水果红薯重增加150~200 g。
The experiment was conducted on the best fertilization rate of fruit sweet potato by using the plastic container whose diameter was 40 cm, diameter 36 cm, height 40 cm, cultivation method was perlite gold water soilless culture. The results showed that in the high efficiency fertilization interval, the benefit of fertilizers reached 10 times, and for each additional 100 g of fertilizers, the biological yield increased 1 085 g and the weight of fruit sweet potato increased 640 g. Fertilizer efficiency was 5-6 times in the middle-effective fertilization interval. For each additional 100 g of fertilizer, the biological yield increased by 493-605 g and the weight of fruit sweet potato increased by 640 g. In the inefficient fertilization interval, the benefit of fertilizer is only 2 ~ 3 times. For every 100 g fertilizer increase, the biological yield only increases by 268 ~ 314 g, and the weight of fruit sweet potato increases by 150 ~ 200 g.