通道县是湖南的重点林区之一,每年要为国家提供10万立方米左右的商品材。每年造林5—6万亩,需要规格杉苗1000—1200万株。由于山地育裸根苗难以满足速生丰产林基地造林的需要,从1987年开始用稻田育苗。1989—1990年,每年占用良田达400亩以上,按每亩产稻谷1200斤,每年就少收稻谷48万斤以上,按人年均600斤粮食计算,可 Channel County is one of the key forest areas in Hunan, each year to provide countries with about 100,000 cubic meters of timber. Annual afforestation 5-6 mu, the need for specifications fir seedlings 1000-1200. Because bare mountain nursery root seedlings can not meet the needs of afforestation in fast-growing and high-yield forest base, paddy field nursery began in 1987. From 1989 to 1990, Liangda occupies more than 400 mu each year. According to 1200 kg of rice per acre, it receives less than 480,000 kg of rice a year, according to an annual average of 600 kg of grain.