Correlations among soil biochemical parameters, crop yield, and soil respiration vary with growth stage and soil depth under fertilization
文献类型： 外文期刊
作者： Liang, Guopeng 1 ; Wu, Xueping 1 ; Cai, Andong 1 ; Dai, Hongcui 4 ; Zhou, Liping 5 ; Cai, Dianxiong 1 ; Houssou, Alber 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Engn Lab Improving Qual Arable Land, Beijing 100081, Peoples R China
2.Utah State Univ, Dept Biol, Logan, UT 84322 USA
3.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
4.Shandong Acad Agr Sci, Crop Res Inst, Jinan 250100, Peoples R China
5.Tianjin Acad Agr Sci, Inst Agr Resource & Environm, Tianjin 300000, Peoples R China
6.Guangxi Univ, Guangxi Key Lab Agroenvironm & Qual Safety Agropr, Nanning 530004, Guangxi, Peoples R China
期刊名称：AGRONOMY JOURNAL （ 影响因子：1.683； 五年影响因子：2.095 ）
ISSN： 0002-1962
年卷期：
页码：
收录情况： SCI
摘要： Most studies only measure soil biochemical parameters in the surface soil at one growth stage to uncover how fertilization affects crop yield and soil respiration. A field study was conducted in a wheat (Triticum aestivum L.)-maize (Zea mays L.) rotation system to determine whether correlations among soil biochemical parameters, crop yield, and soil respiration vary with growth stage and soil depth. Annual crop yield, seasonal soil respiration, soil biochemical parameters at different growth stages (i.e., soil enzyme activity and available N content), and soil chemical parameters at different soil depths (i.e., soil organic carbon [SOC] and total nitrogen [TN] content) were measured. Stronger positive relationships between crop yield, soil respiration, and soil biochemical parameters were found at the first growth stage relative to other stages during both the 2013 wheat and 2014 maize growing seasons. In addition, the most significant relationship among soil chemical properties, crop yield, and soil respiration was found at 20-to-40-cm soil depth during the 2013 wheat growing season but was found at 0-to-20-cm soil depth during the 2014 maize growing season. Overall, correlations among soil biochemical parameters, crop yield, and soil respiration vary with growth stage and soil depth under fertilization. Our study indicates that single time-point measurements of only surface soil biochemical parameters are not sufficient to understand fertilization impacts on crop yield and soil respiration.
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