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木蓝子是多年生豆科落叶直立灌木,高80～200厘米,根系发达,萌蘖力强,具根瘤菌。在水土流失严重,干旱瘠薄的酸性或碱性土壤上均生长良好,是一种绿化荒山、保持水土、改良土壤的优良灌木。 到了冬季,木蓝子的大量落叶,能增加土壤中的有机质,有利于形成团粒结构,增加养分。根部的根瘤菌,有固氮作用,增加土壤氮素,提高土壤肥力。据测定:50公斤木蓝子的幼嫩枝叶,含氮0.98％,五氧化二磷0.25％,氧化钾0.47％,肥效相当于2.5公斤硫酸铵,0.75公斤钙镁磷,2.5公斤草木灰。
Wood blue perennial legumes deciduous vertical shrubs, high 80 to 200 cm, root system, strong sprouting, rhizobia. Soil erosion in arid, arid infertile acidic or alkaline soil growth are good, is a green barren hills, soil and water conservation, soil improvement excellent shrub. In winter, a large number of blueberry leaves, can increase the organic matter in the soil, is conducive to the formation of aggregate structure, increase nutrients. Rhizobium root, nitrogen fixation, increase soil nitrogen, improve soil fertility. It has been determined: young branches and leaves of 50 kilograms of wood blue, 0.98% nitrogen, phosphorus pentoxide 0.25%, 0.47% potassium oxide, fertilizer equivalent to 2.5 kg of ammonium sulfate, 0.75 kg of calcium magnesium phosphate, 2.5 kg of ash.