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在天然水体中,缺磷现象比缺氮、缺钙现象更普遍、更严重。因此,在鱼池水中施用磷肥和在鱼饲料中添加磷肥,可使鱼增产。据江苏省盐城市郊区南洋岸镇一些养殖单位的试验,在鱼池水中施用适量磷肥或在鱼饲料中添加适量磷肥后,鱼产量可增加5～10%,对鱼的品质没有任何影响。在鱼池水中施用磷肥,一般应选用过磷酸钙。如作基肥,每亩用5～6公斤;如作追肥,每半月一次,每次每亩用1.5～2公斤。在施用时,要充分溶解后全池泼洒,最好在
In natural waters, phosphorus deficiency is more common and serious than nitrogen deficiency and calcium deficiency. Therefore, the application of phosphate fertilizer in fish pond water and phosphate fertilizer in fish feed can increase fish production. According to the experiments conducted by some aquaculture units in the Nanyang shore town in the suburbs of Yancheng City, Jiangsu Province, the fish yield can increase 5-10% after applying proper amount of phosphate fertilizer in fish pond water or adding appropriate amount of phosphate fertilizer to fish feed, which has no effect on the quality of fish. Phosphate fertilizer in fish pond water, the general should be used superphosphate. As a base fertilizer, with 5 ~ 6 kg per acre; as a top dressing, once every two months, each with 1.5 to 2 kg per mu. In the application, to fully dissolve Quanchiposa, preferably at