文献类型： 外文期刊

作者： Lyu, N. ¹ ; Shi, L. ¹ ; Sun, L. ² ; Liu, F. ³ ; Chen, Y. ¹ ; Yin, F. ¹ ;

作者机构： 1.Xinjiang Acad Agr & Reclamat Sci, Inst Field Water Conservancy Soil & Fertilizer Re, Shihezi 832000, Xinjiang, Peoples R China

2.Shihezi Univ, Coll Econ & Management, Shihezi 832003, Xinjiang, Peoples R China

3.Anhui Polytech Univ, Coll Management & Engn, Wuhu 241000, Anhui, Peoples R China

关键词： elevated CO2 concentration; nitrogen fertilizer application; cotton growth; biomass; plant total N content; soil NO3--N; soil NH4+-N

期刊名称：APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH （ 影响因子：0.711； 五年影响因子：0.796 ）

ISSN： 1589-1623

年卷期： 2020 年 18 卷 4 期

页码：

收录情况： SCI

摘要： This study aimed to investigate the beneficial effects of elevated CO2 levels and nitrogen fertilization on the nitrogen distribution in a cotton-soil system in China, using CO2 obtained as an industrial byproduct. A semi-open-top artificial climate chamber was used to investigate the effects of ambient CO2 concentration (360 mu mol.mol(-1), Xinjiang) and elevated CO2 concentrations (540 and 720 mu mol.mol(-1)) and application of nitrogen (N) fertilizer (0, 150, 300, and 450 kg.hm(-2)) on cotton growth and available N distribution in the cotton-soil system. The results showed that the cotton biomass was positively influenced by the increase in CO2 concentration and N application. The total N content in the cotton significantly increased with N application, and this increase was more significant with CO2 (540) treatment compared with CO2 (720) treatment. The N accumulation in buds and bolls was the highest, followed by leaves and then stems; it was the lowest in the roots. When the CO2 concentration was elevated to 540 mu mol.mol(-1), the soil NO3--N content decreased significantly. The soil NH4+-N content slightly increased with 0 and 150 kg.hm(-2) N application. When the CO2 concentration was elevated to 720 mu mol.mol(-1), the soil NO3--N content still decreased and the soil NH4+-N content increased. Overall, when the CO2 concentration was elevated, the application of 300 kg.hm(-2) N fertilizer significantly increased the cotton biomass and the total N content. It also promoted the absorption of soil N, especially that of NO3- -N. The findings provided practical guides for N application in the context of elevated CO2 concentration in cotton fields.