静宁县雷大人民公社革委会马保成同志来信:发现一种野生的好猪饲料,叫“断蓿”(当地土名)。特征是五寸至一尺高,有分枝,枝上有小节,根深。每年三月至九月在农田里丛生,锄掉后易再生,是粮食作物的有害杂草。但用来喂猪,猪很爱吃,据调查本地贫农社员已用“断蓿”喂猪三年之 Jingning County People’s Commune Revolutionary Committee Ma Baocheng comrades letter: Found a wild pig feed, called “cut off the” (local soil name). Characteristics are five inches to a foot high, with branches, branches have sections, root deep. From March to September each year in the farmland clusters, easy to regenerate after hoeing, is a harmful weed for food crops. But used to feed pigs, pigs love to eat, according to a survey of local poor peasant members have been using the “cut off” to feed pigs for three years