摘要
我国茶园普遍存在土壤有机碳含量低等问题,这对茶叶产量品质造成极大影响.施加秸秆可提高茶园土壤有机碳含量.土壤有机碳稳定性机制包括有机碳内在难降解性、黏土矿物的化学保护和土壤团聚体的物理保护作用以及生物作用等.土壤有机碳稳定性的影响因素主要有有机碳自身的分子结构性质、土壤生物环境和非生物环境等.施加秸秆提高茶园土壤有机碳主要途径有秸秆自身作为碳源、促进茶树生长、增加土壤微生物生物量以及改良土壤结构和改善土壤化学性质等.最后展望了未来研究所面临的任务.
There are general problems about the soil (e.g.,low content of soil organic carbon content) in tea plantations of China. And these caused great impact on the tea yield and quality. However, straw application can increase the soil organic carbon content. To study the effects of straw application on the stability of soil organic carbon in tea plantations can provide support and guidance for the improvement of tea yield and quality, as well as supplement for the study on carbon cycle, since the stability of soil organic carbon has a great influence on soil carbon sink. The stability mechanisms of soil organic carbon are composed of the inherent refractory degradability of soil organic carbon, the chemical protection of clay minerals, the physical protection of soil aggregates and the biological effects. The influence factors of soil organic carbon stability include the molecular structure of organic carbon, soil biological environments and non-biological environments. It is included that straw application can influence the soil organic carbon stability mainly by straw acting as carbon source, promoting tea growth, increasing soil microbial biomass, improving soil structure and chemical properties. In the end, some prospects were put forward ,and the future research about the straw application on the stabiliy of soil organic carbon was discussed.
作者
崔向超
CUI Xiangchaio(College of Geographic Sciences/Henan Key Laboratory for Synergistic Prevention of Water andSoil Environmental Pollution, Xinyang Normal University, Xinyang 464000 ,China)
出处
《信阳师范学院学报（自然科学版）》
CAS
北大核心
2019年第2期259-265,共7页
Journal of Xinyang Normal University(Natural Science Edition)
基金
国家自然科学基金青年项目(41807038)
中科院南京土壤研究所土壤与农业可持续发展国家重点实验室的开放基金项目(Y20160028)
信阳师范学院"南湖学者奖励计划"青年项目
关键词
秸秆
茶园
有机碳稳定性
土壤团聚体
straw
tea plantation
organic carbon stability
soil aggregates
