Effect of Artificial Enrichments and Inherent Production Capacity on the Fish Production in Taoyuan Reservoirs

施肥與魚池生產潛能對魚產量的影響

林曜松(Yao-Sung Lin) ； 李玉玲(Yuh-Ling Lee)

《臺灣水產學會刊》 6卷1期 (1977/12) Pp. 23-35

https://doi.org/10.29822/JFST.197712.0003

摘要

本研究主要以復迴歸方法對桃園地區1975年的44個魚池進行魚產量分析，探討各種有機、無機肥料，魚池面積及生產潛力對魚産量的影響。所使用的自變數(Independent variable)包括水肥、雞糞、化肥、青草、面積及代表魚池生產潛力的前三年總魚產平均。依變數(Dependent variable)爲鰱魚、鯽魚、鯉魚、鯁魚、鱅魚、草魚、鱸魚、鯰魚等八種魚產量及總魚產量。雞糞、水肥、青草、化肥各因子對總魚產量的關係均顯著，其相關係數(γ)分別爲0.54，0.48，0.43，0.42。而對各別魚產量的影響則不一，相關係數最高者分別爲：青草對於草魚，化肥對於鯁魚、水肥對於鱅魚，它們對魚產變異所能解釋的部分(γ^2×100)，分別爲66%，21%，27%，而其他魚種，各因子能解釋魚產量變異的程度均小於20%。
對總魚產量(Y)具有最大預測能力的迴歸方程式爲：Y=296.91+0.547X1+0.003X2+0.051X3，其中X1爲生產潛力，X2爲水肥投放量，X3爲雞糞投放量。此方程式可解釋總魚產量變異的84%，其中生產潛力解釋45%，水肥解釋26%，雞糞解釋13%。

並列摘要

To determine the function relationship between fish yield and artificial enrichments, we have analyzed, primarily by the multiple regression methods, the data from Taoyuan Serviceman of Fish Propagation Administration. The independent variables were size of reservoirs, inherent production capacity, amount of super phosphate, night-soil, chicken-dung and grass. The dependent variables are the yields of silver carp, crucian carp, common carp, mud carp, bighead, grass carp, perch, catfish and total fish yield. The average of the total fish yield in the 44 reservoirs was 1557kg/ha/yr. The correlation between the total fish yield and inherent production capacity, and the four enrichments was significant at 1% level.
The best equation to predict the total fish yield(Y)for any reservoirs is calculated to be Y=296.91+0.547X1+0.003X2+0.051X3, where X1 is inherent production capacity, X2 is night-soil and X3 is chicken dung, all variables in kg/ha/year. The equation indicates that84% of the variability in total fish yield of which 45% is due to inherent production capacity, 26% to night-soil and 13% to chicken dung.