互花米草生物矿质液对黄粉虫幼虫生长及营养成分的影响

Effects of Biomineral Liquid of Spartina alterniflora on the Growth Performance and Nutrient Component of Tenebrio molitor L. Larva

在室温26～28℃、相对湿度50%～66%和自然光照条件下,将饲料含水量控制为17%,在饲料中分别添加0.1%、0.2%、0.5%、1.0%和0.0%(对照组)的互花米草生物矿质液,黄粉虫放养密度为8头/cm2,试验时间25d。试验前后分别测定黄粉虫幼虫平均体重、干物质含量、总N、总P、金属元素含量。结果表明:①在饲料中添加该生物矿质液对黄粉虫幼虫体重、增重率、死亡率没有显著影响;饲料添加1.0%生物矿质液后幼虫化蛹率明显降低。②投喂0.1%和0.2%生物矿质液后,幼虫体内的Fe、Co、Ni、Cu、Se、Mo等微量元素含量显著高于对照组和其他添加组。③投喂生物矿质液后幼虫粗脂肪含量、干物质含量显著高于对照组,N、P、K、Mg等元素含量显著低于对照组。

Biomineral liquid of Spartina aherniflora contains essential trace elements, vitamins and a few bioactive materials. In order to develop new fodder additive and make use of Spartina resources, this study focused on the effects of biomineral liquid of Spartina on the growth performance, nutrient component of Tenebrio molitor L. larva. The adding levels of biomineral liquid in the fodders were investigated at 0.1%, 0.2%, 0.5%, 1.0% and 0%（control group）. During the experiments, the stocking density of Tenebrio molitor L. larva was 8 larva/cm^2,the moisture content of the feed material was maintained at 17%, the room temperature was 26-28℃, and the room humidity was 50%-66% under spontaneous illumination. We picked up and counted the number of larva of death or pupation in time. The growth rates, pupation rates, dry matter contents, total nitrogen and total phosphorous contents and metal elements contents of the larva were measured before and after the experiments. The results showed that： ①when the experiment was terminated at the end of 25 days, the adding levels didn＇t result in significantly different final weight, weight increase rate and death rate of the larva, but it resulted in significantly different pupation rate. The pupation rate in the group with 1.0% biomineral liquid was higher than that in other groups.② After larvas were fed with 0.1% and 0.2% biomineral liquid, the trace element contents of the larva such as Fe,Co,Ni,Cu, Se,Mo were higher than in other groups.③After the larva were fed with biomineral liquid, the contents of coarse fat and dry matter in larvas were obviously higher than those in control group;The contents of N, P, K and Mg were lower than in control group.