广东省广宁县古兴乡蒙坑社张文森同志58年产脂量平均日产66斤。他的经验如下:1.选定刮面:刮面要选择树叶茂,树皮色泽鲜明有小颗粒松脂流露的部分为开沟的刮面,以利产脂量的提高。2.刮刮面:刮粗皮时不要刮伤内皮,采脂后每1—2个月要修刮面粗皮一次,以减少开侧沟时的阻 Guangning County, Guangdong Province, Guixing Township Meng pit company comrades 58 years average fat yield 66 pounds. His experience is as follows: 1. Selected scraping surface: scraping surface to choose leafy, bark bright color with small particles of rosin exposed part of the ditch scraping surface to facilitate fat production increased. Scraping surface: Do not scratch the skin when scraping the skin, the grease after every 1-2 months to repair shaving skin once in order to reduce the resistance of the open ditch