ABSTRACT

Sasa kurilensis

is a popular wild edible bamboo in Japan. Productivity (density) of edible culms can be enhanced by human harvesting, but we know little about how long the enhanced productivity is sustained after repeated annual harvesting. Here, demography and productivity of this edible bamboo were examined in field experiments conducted following experimental harvesting of edible bamboo culms for three years. Compared to the productivity of wild edible bamboo culms in the control plots, which were maintained with no human disturbance, productivity in the harvest-treatment plots (harvest conducted annually) was always greater in years following harvesting. In addition, food quality tests for boiled, edible bamboo culms collected from both harvest-treatment and control plots showed that there was little effect of harvesting on food quality of edible bamboo culms but that harvesting might degrade the favorability of food texture of boiled edible bamboo culms. Subsequent surveys demonstrated that the enhanced productivity may occur independently of demography (density) of old culms and that the enhanced productivity effect disappeared two years after the harvest treatment was stopped. These results indicate that repeated, annual harvesting is necessary to promote productivity of edible bamboo culms. These interesting but counterintuitive results can be explained by over-compensatory growth by dwarf bamboo, which respond by producing new photosynthetic organs to compensate for tissue loss by human harvesting. Thus, effective induction of compensatory growth may be a key factor in increasing the production of wild edible plants.

中文翻译：

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响应日本北部森林一年一度的反复采伐，可持续提高莎莎草的可食用茎秆的生产力

摘要

莎丽莎

是日本流行的野生食用竹。可以通过人类收获来提高食用菌的生产率（密度），但是我们不知道在每年重复收获之后提高生产率能维持多长时间。在此，在对食用竹杆进行了三年的实验性收获之后，通过田间试验对这种食用竹杆的人口统计学和生产率进行了检查。与在没有人为干扰的情况下保持对照的野生食用竹杆的生产力相比，在收获后的几年中，收成处理区（每年进行的收获）的生产力始终更高。此外，还对水煮食品进行了质量检测，从收割处理区和对照区收集的食用竹茎表明，收获对食用竹茎的食品质量影响不大，但是收获可能降低煮沸的食用竹茎的口感。随后的调查表明，生产力的提高可能独立于旧茎的人口统计学（密度）而发生，并且生产力的提高效果在停止收获处理后的两年内消失了。这些结果表明，每年重复收获对于提高食用竹杆的生产力是必要的。这些有趣但与直觉相反的结果可以用矮竹过度补偿生长来解释，矮竹会产生新的光合器官以补偿人类收割造成的组织损失。从而，