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延安地区水土保持研究所,从1984年开始引种红豆草,经过两年的栽培试验,生长良好完全可以落户陕北黄土高原。有关专家认为,红豆草对保持水土、改良土壤具有明显的经济效益,是值得推广的一种优良牧草。红豆草是豆科多年生草本植物,原产于欧州和俄罗斯,主要分布在欧州、非洲北部、亚洲西部与南部。我国天山北坡半阴坡处有野生公布。该草生长年限长、适应性强,具有抗旱、耐贫瘠等特点,其抗旱能力超过紫花苜蓿。由于根系发达,根瘤较多,因而固结和改良土壤的性能强。茎、叶营养
Yan’an Institute of Soil and Water Conservation, since the introduction of sainfoin in 1984, after two years of cultivation tests, well-grown can be located in the Loess Plateau of northern Shaanxi. Experts believe that safflower to maintain soil and water, soil improvement has obvious economic benefits, it is worth promoting a good grass. Soybean is a legume perennial herb, native to Europe and Russia, mainly in Europe, northern Africa, western and southern Asia. Half of the northern slope of Tianshan Mountains in our country has a wild announcement. The grass grows for a long time, adaptability, with drought, poor resistance and other characteristics, its ability to drought more than alfalfa. Due to the well-developed root system, there are many root nodules, so the properties of soil consolidation and improvement are strong. Stems, leaf nutrition