毛竹林按其经营制有花年竹林和大小年竹林之分。花年竹林即年年发笋长竹且相邻年份林分生长量相近的竹林。大小年竹林则不同,相邻年份林分竹笋和竹秆等的生长量相差悬殊,其中的一年由于林分生长量很少,甚至无笋无新竹,称为小年。资料和作者在龙游县毛竹低产林改造技术研究的结果皆表明,大小年毛竹林的年均(或度)经济产量和生物量不及 Moso bamboo forest according to their operating system with years of bamboo and the size of bamboo points. Year of the bamboo forest annual bamboo shoots grow bamboo and adjacent years growth of similar stands of bamboo. The size of the year bamboo is different, the adjacent years bamboo shoots and bamboo stalks and other growth differences, one year because of the stand growth is very small, or even bamboo shoots without Hsinchu, known as the small year. Data and authors in Longyou County, bamboo low yield forest transformation technology research results show that the size of annual bamboo (or) economic output and biomass less than