聚合草又叫紫草根,原产欧洲。我国一些地方栽培的聚合草,先后从日本、澳大利亚和朝鲜等国引进。它是一种多年生草本植物,可作青饲料,又可作绿肥,优点是容易栽培,再生性强,速生高产,养分含量高。据分析,聚合草富含粗蛋白、碳水化合物、各种维生素和矿物质,而粗纤维的含量较低(表1)。但从不同国家引进的聚合草某些养分含量略有差异(表2)。聚合草作饲料,可切碎或打浆鲜喂,也可于花期刈割单作青贮或与青割禾本科饲料混合作青贮饲料。在干旱条件下刈割的,可制作干草粉,作为蛋白质和维生素饲料的补充来源。1973年8月1日至10月1日,辽宁省熊岳农科所对“哈白”杂种猪作了饲喂试验,把割下的聚合草切碎,每日每头喂鲜草叶7斤,以等量的甜菜叶等作对照,和其他同质等量饲料混拌后直接喂饲。结果表明,拌有聚合草叶的猪爱吃,增重快(表3)。 Aggregate grass, also known as comfrey root, native to Europe. Aggregates cultivated in some parts of China have been introduced from Japan, Australia and North Korea in succession. It is a perennial herb, can be used as green feed, but also for green manure, the advantage is easy to cultivate, renewable, fast growing high yield, high nutrient content. According to analysis, Agrocybe grass is rich in crude protein, carbohydrates, vitamins and minerals, while crude fiber content is low (Table 1). However, some nutrients in polymerized grass introduced from different countries are slightly different (Table 2). Aggregate grass feed, chopped or beaten fresh feed, but also during the flowering mow single silage or mixed with forage grass for silage. Mowed under dry conditions, hay powder can be made as a supplementary source of protein and vitamin feed. From August 1, 1973 to October 1, 1973, Xiong Yue Agricultural Research Institute of Liaoning Province made a feeding experiment on “Ha Bai” hybrid pigs. The cut grass was chopped and fed with 7 kg fresh grass leaves. The same amount of beet leaves as a control, and other homogeneous feed the same amount of direct feed. The results showed that pigs with aggregated grass blades preferred to eat fast and gain weight (Table 3).