ABSTRACT Increasing the forest's productivity is a global concern and there is a need to develop innovative technologies. The use of biochar (BC) in the restoration of degraded sites is mounting. Therefore, to assess the effects of rice straw biochar (BR) on soil physicochemical properties and physiology of Fokienia hodginsii, a one-year greenhouse pot experiment was conducted. The soil was mixed with BR at four different levels; 0, 5, 20, and 80 g kg−1of soil as B0, BR5, BR20, and BR80, respectively. The light-response curves of photosynthesis were constructed by using the modified model of rectangular hyperbola including photosynthetic pigments and biochemical attributes quarterly. BR treated seedlings responded with a significant increase in the photosynthetic rate at first, second, and fourth season, respectively. Increasing the proportion of BR in the soil significantly influenced the soil pH and P availability. At the final harvest, improved soil and physiology promoted the seedling biomass (36%) under BR80 compared to B0. Therefore, these findings suggest that BR can be used to combat soil acidification and P availability in P deficit soil. Its amendment into the soil can be useful to alleviate the physiological performance of the conifer seedlings, but its effects may vary with soil type and BC feed-stock.

中文翻译：

---

稻草生物炭对酸性土壤中福建柏生理生化特性的影响

摘要 提高森林生产力是全球关注的问题，需要开发创新技术。生物炭 (BC) 在退化地点恢复中的使用正在增加。因此，为了评估稻草生物炭（BR）对福建柏土壤理化性质和生理的影响，进行了为期一年的温室盆栽试验。土壤与 BR 在四个不同的水平混合；0、5、20 和 80 g kg−1 的土壤分别作为 B0、BR5、BR20 和 BR80。利用包含光合色素和生化属性的矩形双曲线修正模型，构建光合作用光响应曲线。BR 处理的幼苗分别在第一、第二和第四季光合速率显着增加。增加土壤中 BR 的比例显着影响土壤 pH 值和 P 有效性。在最后收获时，与 B0 相比，在 BR80 下，改良的土壤和生理促进了幼苗生物量 (36%)。因此，这些发现表明 BR 可用于对抗缺磷土壤中的土壤酸化和磷有效性。其土壤改良剂可用于减轻针叶树幼苗的生理性能，但其效果可能因土壤类型和 BC 原料而异。