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本文通过在精养鱼池中施用新型磷肥“鱼特灵”,使池水有效磷由10微克/升以下提高到30微克/升以上,有效氮明显下降,有效N/P保持在35～50:1,浮游植物数量显著增加。试验地浮游植物数量(Y)与总铵(NH_4-N+NH_3-N)(X_1)、NO_3-N(X_2)、PO_4-P(X_4)呈如下关系式:Y=55.94-0.67X_1-11.61X_2-47.95X_4(r=0.73,n=28,P<0.05)达到了增施磷肥,促进氮肥利用和浮游植物增殖,改善水质,提高池塘初级生产力的目的。施用“鱼特灵”后,池塘平均净产增长11.6%,其中鲢、鳙净产增长13.7%。
In this paper, the new type of phosphate fertilizer “Cuttlefish” was applied to intensive fish ponds to raise the available phosphorus in the pond water from above 10 μg / L to above 30 μg / L, and the available N decreased obviously. The effective N / P was kept at 35-50: 1, the number of phytoplankton increased significantly. The quantity of phytoplankton (Y) and the total ammonium (NH_4-N + NH_3-N) (X_1), NO_3-N (X_2) and PO_4-P (X_4) were as follows: Y = 55.94-0.67X_1-11.61 X_2-47.95X_4 (r = 0.73, n = 28, P <0.05) reached the purpose of increasing phosphate fertilizer, promoting nitrogen fertilizer use and phytoplankton proliferation, improving water quality and increasing primary productivity of pond. The average net production of ponds increased by 11.6% after applying the “fish trachment”, of which the net production of silver carp and bighead carp increased by 13.7%.