source of manure

One type of beetle rolls the dung into balls for use as a food source, others bury the dung wherever they find it, and others are dwellers who simply live in manure.

有的屎壳郎惯于把粪便滚成球留作食物储备，有的则惯于在发现粪便的地方将其掩埋起来，还有的甚至是居住在粪堆里的。

Results indicated that the contribution of brute manure, domestic pollution source, runoff and food-supplied fishpond to water pollution load was 43.81%, 29. 91%, 22. 43% and 3. 85%, respectively.

研究结果表明，当前各类农业非点源污染对水体的污染负荷贡献率为：畜禽粪尿43.81%，生活污染29.91%，农田径流和渗漏22.43%精养鱼塘3.85%。