浸泡对浮性饲料粗蛋白含量及水质的影响  

Effects of Soaking Treatment on Crude Protein Level in Floating Feed and Related Water Quality

作　　者：杨世勇[1] 黄代伟[1] 杜宗君[1] 范林君[1] 汪开毓[1] 王用黎[1] 

机构地区：[1]四川农业大学,四川雅安625014

出　　处：《水产科学》2011年第5期295-297,共3页Fisheries Science

基　　金：四川省"十一五"畜禽水产育种攻关项目

摘　　要：在11℃与25℃下,测定养殖池水浸泡浮性饲料24 h后粗蛋白及水体中总氨氮和总磷含量的变化。试验结果表明,随着浸泡时间的延长,饲料粗蛋白逐渐下降,而水体总氨氮和总磷浓度逐渐升高。浸泡4 h,25℃组饲料粗蛋白从初始(29.983±0.262)%降至(12.930±0.339)%,降幅56.9%,极显著高于11℃组的下降幅度(P<0.01),浸泡24 h,2个温度组饲料粗蛋白均下降80%以上。浸泡24h,11℃组和25℃组水体中的总氨氮浓度由初始的(0.135±0.001)mg/L分别增至(0.427±0.003)mg/L和(0.590±0.002)mg/L;总磷含量由初始的(0.075±0.001)mg/L分别增至(1.199±0.002)mg/L和(1.271±0.008)mg/L。建议在养殖过程中,尤其是高温季节,尽量缩短浮性饲料在水中的停留时间。The changes in crude protein, TNH4-N and TP levels were monitored in the water in the floating feed soaked for 24 h in a pond at water temperature of 11 ℃ and 25 ℃. It was found that the crude protein levels were decreased gradually, being declined from（29. 983 ± 0. 262）% to（12. 930±0. 339）% at 25 ℃ （over 80% after 24 h）,very significantly higher than that at 11 ℃ （P〈0.01）,while the TNH4-N and TP levels were increased gradually in 24 h. The TNH4-N level was found to increase from（0. 135 ±0. 001） mg/L to（0. 4274-0. 003） mg/L at 11 ℃ and to（0. 590±0. 002） mg/L at 25 ℃arter 24 h. The TP levels were found to be increased from initial（0. 075±0. 001） mg/L to（1. 199±0. 002） mg/L at 11 ℃ and to （1. 271±0. 008） mg/L at 25 ℃ after 24 h,suggesting that the floating feed be fed as soon as possible after administration, especially in hot seasons.

关 键 词：浮性饲料 浸泡 粗蛋白 总氨氮 总磷 

分 类 号：S963.16[农业科学—水产养殖]