Effects of TiO2 NPs on Silkworm Growth and Feed Efficiency
Effects of TiO2 NPs on Silkworm Growth and Feed Efficiency
复制标题
DOI：
10.1007/s12011-015-0413-5
复制
发表时间：
2016-02-01
影响因子：
3.9
通讯作者：
Li, Bing
中科院分区：
文献类型：
--
作者：
Li, YangYang;Ni, Min;Li, Bing
家蚕（B.桑（Mori）是鳞翅目昆虫的模式种，也是重要的经济昆虫。据报道，饲喂低浓度的纳米二氧化钛（TiO 2 NPs）可以提高饲料效率，增加茧量、茧层量和茧层率。然而，高浓度的TiO 2 NP是有毒的。在这项研究中，我们喂养了B。用不同浓度的TiO 2 NPs（5、10、20、40、80和160 mg/L）处理桑白皮，并研究了B。家蚕生长、饲料效率和茧质。我们发现，低浓度的TiO 2纳米颗粒（5和10 mg/L）对增重更有效，在72 h时获得显著增重（P < 0.05）。20 mg/L以上的TiO 2纳米粒子对B有一定的抑制作用，对B有明显的抑制作用。在48小时观察到桑细胞生长。低浓度（5和10 mg/L）显著提高饲料效率，分别为14.6和13.1%（P < 0.05）。全是B。结果表明，添加纳米TiO 2颗粒能显著提高家蚕的茧量和茧层量，其中添加5和10 mg/L纳米TiO 2颗粒能显著提高家蚕的茧量，分别提高8.29和9.39%（P < 0.05）。我们还发现，低浓度（5和10 mg/L）的二氧化钛纳米颗粒促进B。提高饲料效率，增加产茧量，而高浓度（20 mg/L或更高）的TiO 2纳米颗粒对B有抑制作用。桑。连续投喂高浓度的TiO 2纳米颗粒导致一定程度的适应性。本研究为纳米TiO 2颗粒的毒性研究提供了参考，为纳米TiO 2颗粒作为B饲料添加剂的开发提供了依据。桑。
Silkworm (Bombyx mori) (B. mori) is an economically important insect and a model species for Lepidoptera. It has been reported that feeding of low concentrations of titanium dioxide nanoparticles (TiO2 NPs) can improve feed efficiency and increase cocoon mass, cocoon shell mass, and the ratio of cocoon shell. However, high concentrations of TiO2 NPs are toxic. In this study, we fed B. mori with different concentrations of TiO2 NPs (5, 10, 20, 40, 80, and 160 mg/L) and investigated B. mori growth, feed efficiency, and cocoon quality. We found that low concentrations of TiO2 NPs (5 and 10 mg/L) were more effective for weight gains, with significant weight gain being obtained at 72 h (P < 0.05). TiO2 NPs at 20 mg/L or higher had certain inhibitory effects, with significant inhibition to B. mori growth being observed at 48 h. The feed efficiency was significantly improved at low concentrations of 5 and 10 mg/L for 14.6 and 13.1 %, respectively (P < 0.05). All B. mori fed with TiO2 NPs showed increased cocoon mass and cocoon shell mass; at 5 and 10 mg/L TiO2 NPs, cocoon mass was significantly increased by 8.29 and 9.39 %, respectively (P < 0.05). We also found that low concentrations (5 and 10 mg/L) of TiO2 NPs promoted B. mori growth and development, improved feed efficiency, and increased cocoon production, while high concentrations (20 mg/L or higher) of TiO2 NPs showed inhibitory effect to the B. mori. Consecutive feeding of high concentrations of TiO2 NPs led to some degrees of adaptability. This study provides a reference for the research on TiO2 NPs toxicity and the basis for the development of TiO2 NPs as a feed additive for B. mori.