布氏田鼠日食量研究

目的室内条件下测定不同年龄和性别布氏田鼠的日食量。方法参照《动物生态学原理》用布氏田鼠喜食植物喂养24h后，计算供食量与残渣的差值。结果（1）布氏田鼠平均日食量（干重）为（9．9361±0．2383）g。成体组平均日食量略高于亚成体组和老体组，且不同年龄组田鼠日食量差异有统计学意义（P〈0．05）。其中亚成体组平均日食指数较高。（2）3个年龄组中不同性别平均日食指数差异均无统计学意义，即性别对布氏田鼠取食无显著影响。（3）亚成体布氏田鼠体重与日食量呈正相关性，y=0．2882w＋2．099（R^2=0．8191）；老体鼠体重与日食量呈负相关，y=0．1565w＋19．034（R^2=0．5652），成体鼠体重与日食量无显著相关。结论不同年龄组体重与日食量之间存在不同的相关关系，如果根据体重来估算布氏田鼠的危害，必须先掌握该季节布氏田鼠的年龄结构和相应的种群密度，且还应考虑季节性特点和繁殖期生理特点。

Study on daily food consumption of Brandt's vole(Lasiopodomys brandtii)

Objective Analyze the daily food consumption of different age group and sex Brandt＇s vole（ Lasiopodomys brandtii） in laboratory. Methods Feed the Brandt＇s vole with their favorite food, and calculate the difference between the given food and leavings after 24 h referring to Principles of Animal Ecology by Sun Ruyong. Results （1） The average daily food consumption of Brandt＇ s vole was （9. 9361 ± 0. 2383）g. That of adult group was higher than sub-adult and elder groups. There were significant differences among the daily food consumption of different age groups （P〈 0.05）. Among them, the daily food consumption index of sub-adult group was the highest. （2） There was no direct correlation between sex and dally food consumption. （3） The body weight of sub-adult rat had the positive relativity with daily food consumption, however there was negative correlation in elder group. And the linear regression equations were y = 0. 2882w ＋ 2. 099 （ R^2 = 0. 8191 ） and y=-0.1565w ＋19.034 （R^2= 0.5652）, respectively. There was no direct correlation between weight and daily food consumption of adult group. Conclusion There was different relationship between body weight and food consumption. If evaluate the harm according to Brandt＇s body weight, we should master the age structure of Brandt＇ s vole and its corresponding population density, and also take seasonal characteristics and physiological characteristics into account.