当前位置: X-MOL 学术Cellulose › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Changes in the chemical composition of young Chinese fir wood exposed to different soil temperature and water content
Cellulose ( IF 5.7 ) Pub Date : 2020-02-19 , DOI: 10.1007/s10570-020-03039-3
Jiale Sheng , Jiabao Chen , Cai Liu , Zhijie Yang , Yusheng Yang , Xin Guan , Jinguo Lin

Abstract

The chemical composition of wood is closely related to its growing conditions, such as soil temperature and water. Four different types of soil warming and precipitation exclusion treatments were used to simulate the underground response and adaptability of Chinese fir to global warming. The compaction method was used to reclaim the Chinese fir soil from the nearby woodland to ensure that the soil bulk density was as consistent as possible. The chemical constituents of Chinese fir wood were studied by taking Chinese fir discs at breast height of 1.3 m. With changing the growth environment, the content of different extracts and the chemical composition of Chinese fir have changed. The cellulose content of Chinese fir increased significantly with precipitation exclusion − 50%. The organic extract content of Chinese fir increased in different degrees under soil warming and precipitation exclusion, which may be related to the accumulation of organic matter content and be beneficial to the improvement of the biomass of Chinese fir. Due to the change of temperature and water content in soil, the internal adaptability of Chinese fir wood cellulose like crystalline zone, overall orderliness also may decrease. Precipitation exclusion − 50% still has the greatest impact on it. The soil warming and precipitation exclusion can inhibit lignin synthesis of Chinese fir. The lignin condensation index decreased with the decrease of lignin content, possibly due to the change of syringyl lignin content. Experiments show that the underground parts of terrestrial ecosystems may provide positive effects from global warming, although the extent of such consequences is uncertain.



中文翻译:

暴露于不同土壤温度和含水量的杉木幼材化学成分的变化

摘要

木材的化学成分与其生长条件(例如土壤温度和水)密切相关。四种不同类型的土壤变暖和降水排除处理被用来模拟杉木对全球变暖的地下响应和适应性。压实方法用于从附近林地中回收杉木土壤,以确保土壤容重尽可能一致。以杉木高1.3m的杉木圆盘研究杉木的化学成分。随着生长环境的变化,杉木提取物的含量和化学成分也发生了变化。杉木的纤维素含量随降水的增加而显着增加-50%。在气候变暖和降水排除条件下,杉木的有机提取物含量均有不同程度的增加,这可能与有机质含量的积累有关,有利于杉木生物量的提高。由于土壤温度和含水量的变化,杉木纤维素的内部适应性如结晶带,整体有序性也可能降低。降水排除-50%的影响最大。土壤变暖和降水排除可抑制杉木木质素的合成。木质素缩合指数随木质素含量的降低而降低,可能是由于丁香基木质素含量的变化。实验表明,陆地生态系统的地下部分可能会因全球变暖而产生积极影响,

更新日期:2020-02-19
down
wechat
bug