陕西省子长县林业劳动模范杨登海同志创造了臭椿无节良材速成培育法,只要15年就可育出臭木良材。杨登海同志由49年至56年先后在自己门前一块0.6亩的坡地“35度—40度”上栽培臭椿83株,现已生长木材3.0835米~3,其中第一类有4株,胸高直径17厘米,高度13米;第二类14株,胸高直径10厘米,高度 Comrade Yang Dehai, a model forestry worker in Zichang County, Shaanxi Province, has created a quick-to-grow cultivation method for stinkbugs, and as long as 15 years, he has been able to breed stinkwood. From 1993 to 2006, Comrade Yang Denghai successively cultivated 83 stinkbugs on a 0.6-acre slope “35 degrees -40 degrees Celsius” in his own right, and has now grown timber of 3.0835 meters to 3, of which there are 4 species in the first category, Chest height of 17 cm in diameter and height of 13 meters; the second category of 14 strains, 10 cm in diameter chest height