四棱豆,又名翼豆,是一种多年生攀缘植物,起源于大洋洲的美拉尼西亚群岛,现已广泛分布在东南亚和大平洋岛屿赤道多雨地区。大量的分析结果表明,四棱豆植株不同部位的养分含量变异较大,如种子中蛋白质含量为20.7—45.9％,油含量为7.2—21.5％。一种根瘤密集的植物能固定大量的氮,氮素通过根转运到植株其他部分。四棱豆根的含 Tetragonal beans, also known as wing beans, is a perennial climbing plant that originated in the Melanesian islands of Oceania and is now widely distributed in equatorial rainy regions of Southeast Asia and the Pacific Ocean. Numerous analysis results showed that the nutrient content of different parts of Pyrus ussuriensis varied greatly. For example, the protein content in seeds was 20.7-45.9% and the oil content was 7.2-21.5%. A nodule-dense plant holds large amounts of nitrogen, which is transported by root to the rest of the plant. Four-edged bean root contains