热带亚热带植物学报2024，Vol.32Issue(1)：10-16,7.DOI:10.11926/jtsb.4847
不同改良剂对珊瑚砂理化性质和氮素固持的影响
Effects of Different Amendments on Physicochemical Properties and Nitrogen Fixation in Coral Sands
摘要
Abstract
The adaptability of plant growth in soil conditions on Chinese tropical coral islands is severely limited by the alkaline environment and soil nutrient deficiencies.Improving coral sand is essential to facilitate the rejuvenation of coral island vegetation and maintain the healthy development of the coral island ecosystem.In this study,we investigated the effects of four common soil amendment materials(vermiculite,perlite,biochar and calcium-based bentonite)on the physicochemical properties,nitrogen leaching and total nitrogen content of coral sand under the same gradient using an indoor soil column simulation test.The results showed that the application of biochar significantly reduced the pH of coral sand by 1.4%compared to the control(CK),and calcium-based bentonite,biochar,and vermiculite were able to significantly increase the cation exchange capacity of coral sand to 24.21,10.43,and 9.43 times that of CK.Meanwhile,during the leaching process,nitrogen was rapidly leached out mainly in the form of nitrate nitrogen,and the application of biochar,calcium-based bentonite and vermiculite could not reduce the nitrogen leaching loss,but it could achieve the effect of promoting nitrogen fixation in coral sands by promoting nitrogen fixation through other pathways,which resulted in the reduction of total soil nitrogen loss under the addition of the three amendments versus CK by 40.92%,27.32%and 25.09%,respectively.The utilization of biochar,vermiculite and calcium-based bentonite can therefore effectively improve the quality of coral sand soil,which is of great significance for the improvement of coral sand and the restoration of tropical coral island vegetation,among which biochar has the most significant improvement effect and is the ideal material for the improvement of coral sand.关键词
珊瑚砂/土壤改良/氮肥淋失/氮素固持Key words
Coral sand/Soil amendment/Nitrogen fertilizer leaching/Nitrogen sequestration引用本文复制引用
陈涵,邹碧,李应文,李泳兴,李志安,陈慧娟,王法明..不同改良剂对珊瑚砂理化性质和氮素固持的影响[J].热带亚热带植物学报,2024,32(1):10-16,7.基金项目
国家重点研发计划项目(2021YFC3100402) （2021YFC3100402）
广东省科技计划野外科学考察项目(2021B1212110004)资助This work was supported by the National Key Research and Development Program of China(Grant No.2021YFC3100402),and the Project for Field Scientific Expedition of Guangdong Science and Technology Plan(Grant No.2021B1212110004). （2021B1212110004）
