预混合饲料中Fe^(2+)在不同载体及环境条件下损失率的研究

A study on Fe^(2+) loss rate in premix under different carriers and environments Henan Agricultural Universit■

实验结果证明,贮存的温度、湿度、时间对 Fe^(2+)的损失率有极显著的影响(P<0.01)。第8周时,Fe^(2+)的损失率,高温(25—30℃)比中温(10—22℃)高40.53%(P<0.01);高湿(相对湿度80%以上)比中湿(70—80%)高24.15%(P<0.05)。随着贮存时间(X)的延长,Fe^(2+)损失率(Y)增加,即:Y=1.36X+3.67温度、湿度和贮存时间之间有显著的交互作用。以 Fe^(2+)损失率作为评价载体(稀释剂)化学稳定性和选择的指标,其顺序是:玉米、小麦麸、膨润土、沸石、骨粉、磷酸氢钙和碳酸钙。玉米、小麦麸、膨润土、沸石与骨粉之间差异不显著(P>0.05),但它们与碳酸钙、磷酸氢钙之间差异极显著(P<0.01)。建议,碳酸钙和磷酸氢钙不宜作为含 Fe^(2+)微量元素预混料的载体或稀释剂。贮存温度不超过22℃,相对湿度不超过70%,贮存时间在5个月以内。

The study proved that the store temperature,relative humidity and timehad strong relationship with Fe^(2+) loss.The loss rate of Fe^(2+)was40.53%hig-her at 25-30℃ than that at 10-22℃ in eighth week(P<0.05).This samewith relative humidity was 24.15% higher in high humidity(more than80%)than that of mediea(70-80%)(P<0.05).It was increased with store timeprolonged as following;Y=1.36X+3.67There were remarkable interaction between temperature,relative humidityand store time.According to the rate of Fe^(2+)loss,the order of carrierswas corn,wheat bran,bentomite(AlO_3·4SiO_2·3H_2O),zeodites(M(n/2)O·AlO_3·XSiO_2·YH_2O),bone-meal,CaHPO_4and CaCO_3.Corn,wheat bran,bent-omite and zeolites had great difference(P<0.01)with CaCO_3 and CaHPO_4,but differerce(P<0.05)with bone-meal.The author suggested that CaCO_3andCaHPO_4were not fit for carriers or diluters of mineral premix.Better teme-perature(<22℃),relative humidity(<70%)and store time(<5months)were proposed.