Caragana

Caragana

　　Caragana, also known as small-leaved peashrub, beefwood, or snow hollow, is an excellent shrub species native to the Loess Plateau and desert regions of Yulin. It serves as high-quality fodder, fertilizer, fuel, weaving material, and a sand-fixing and soil-conserving plant.

Caragana in Yulin is a locally cultivated, widely planted native tree species across various counties in the region. It accounts for about 30%–50% of the forested area in northern Shaanxi. Taking Hengshan County as an example, the county has over 1 million mu (approximately 66,667 hectares) of Caragana, spread throughout the region and making up more than half of its total forested area. To meet the needs of greening northwestern China and combating desertification, in 1980 the state designated Hengshan County as a national Caragana seed production base. In recent years, over 700,000 kilograms of Caragana seeds have been harvested annually. In addition to meeting local demand, approximately 600,000 kilograms of Caragana seeds are sold to provinces and autonomous regions such as Ningxia, Gansu, and Inner Mongolia.

Caragana in Yulin is a pioneer plant in arid, water-scarce grasslands and semi-desert regions plagued by wind-blown sands. For centuries, shifting sands have buried pastures, swallowed farmland, inundated villages and towns, and worsened the environment, bringing great disaster to humanity. Yet, in these barren sandy areas where most plants struggle to survive, Caragana thrives, forming communities with vertical spreads of 7–8 meters and over a hundred branches, fearlessly battling the drifting sands. The sandy areas are deficient in nutrients and water, but Caragana has adapted with strategies to conserve and utilize resources. Its robust root system can penetrate deep into the sand layers to absorb moisture. The tender branches and fine leaves on the surface are coated with a white waxy layer that reduces moisture evaporation. Its extensive root network is covered with countless root nodules; each nodule functions like a tiny nitrogen-fixing workshop, enriching the sandy soil with nutrients. As the Caragana roots extend deeper and wider into the sand, they bind loose grains together, while the above-ground branches and leaves trap wind-blown sand at their base. This coordinated effort forces the aggressive shifting sands to settle down. According to expert measurements, an 8-year-old Caragana plant, growing 1.5–2 meters tall, can cover 4 square meters of ground, reduce surface runoff by 3%, decrease topsoil erosion by 66%, and intercept 0.15 cubic meters of drifting sand. Growing densely in clusters, Caragana can quickly cloak barren land with a green protective shield. Its ability to conserve soil and water surpasses that of trees. Each year, Yulin sees about 500 million tons of silt washed into the Yellow River. Some scholars have pointedly remarked: “What the Yellow River carries away is not just silt, but the lifeblood of the Chinese nation!” And Caragana is one of the best “hemostatic agents” for curbing soil erosion in northern Shaanxi.

Not only does Caragana in Yulin prevent wind and fix sand, but it is also a “sturdy forage crop,” suitable for grazing livestock and serving as highly nutritious woody fodder. Caragana sprouts vigorously, and its tender branches and leaves, as well as seed pods, are rich in nutrients. One inch of Caragana twig is equivalent to one black bean, and 1.5–3 mu of Caragana can sustain one sheep. During spring and summer, flocks that graze on it can regenerate and recover in just 7–10 days. In winter, when heavy snow blocks access to mountains and early spring delays the regrowth of other plants, Caragana becomes a vital “lifeline fodder” for livestock—playing a crucial role in protecting sheep and ensuring the survival of lambs.

Every part of Caragana in Yulin is valuable. Its straight and resilient branches are excellent materials for weaving. The tender branches and leaves are rich in nitrogen, phosphorus, and potassium, making them ideal for producing green manure—they are hailed as the “king of green fertilizers.” Measurements show that 500 kilograms of dried branches and leaves can match the fertility of 2,000 kilograms of stable manure, making it a natural, highly effective “compound fertilizer.” When used as firewood, it serves as powerful fuel in areas where “fuel supply is ample but cooking fuel is scarce.” Three kilograms of Caragana firewood equals the heating value of one kilogram of good coal. Due to its waxy outer layer, it burns well whether dry or damp. The bark also serves as quality fiber material. The seeds can be pressed for oil, useful for lubrication and lighting. The flowers provide a source of nectar. The roots, flowers, and seeds all have medicinal properties, offering benefits such as nourishing yin and blood, regulating menstruation, calming nerves, and relieving itching. Hence, locals in northern Shaanxi say: “Caragana is a treasure—it is both forest and grass. It prevents wind, blocks sand, stores water, and conserves soil. It’s great for weaving, medicine, and honey production. It feeds sheep, serves as fuel, acts as fertilizer, and is excellent fodder for livestock.”