Long-Term Organic Substitution Promotes Carbon and Nitrogen Sequestration and Benefit Crop Production in Upland Field
文献类型： 外文期刊
作者： Xu, Hu 1 ; Cai, Andong 2 ; Yang, Xueyun 1 ; Zhang, Shulan 1 ; Huang, Shaomin 5 ; Wang, Boren 2 ; Zhu, Ping 7 ; Colinet, Gilles 3 ; Sun, Nan 2 ; Xu, Minggang 2 ; Zhang, Wenju 2 ;
作者机构： 1.Northwest A&F Univ, Coll Nat Resources & Environm, Key Lab Plant Nutr & Agrienvironm Northwest China, Minist Agr, Xianyang 712100, Peoples R China
2.Inst Agr Resources & Reg Planning, Chinese Acad Agr Sci CAAS, Key Lab Arable Land Qual Monitoring & Evaluat, State Key Lab Efficient Utilizat Arid & Semiarid A, Beijing 100081, Peoples R China
3.Univ Liege, Gembloux Agrobio Tech, B-5030 Gembloux, Belgium
4.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
5.Henan Acad Agr Sci, Inst Plant Nutr & Environm Resources Sci, Zhengzhou 450002, Peoples R China
6.Qiyang Agroecosystem Natl Field Expt Stn, Qiyang 426100, Peoples R China
7.Jilin Acad Agr Sci, Inst Agr Resource & Environm, Changchun 130033, Peoples R China
8.Shanxi Agr Univ, Inst Ecoenvironm & Ind Technol, Key Lab Soil Environm & Nutrient Resources Shanxi, Taiyuan 030031, Peoples R China
关键词： long-term experiment; soil profile; carbon sequestration; crop productivity; sustainable yield index
期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）
ISSN：
年卷期： 2023 年 13 卷 9 期
页码：
收录情况： SCI
摘要： Partial substitution of synthetic nitrogen fertilizer with manure (organic substitution) is highly recommended to minimize environmental risks without compromising crop productivity in intensive agricultural systems. However, our understanding of the effect of organic substitution on soil organic carbon (OC) and total nitrogen (TN) in deep soil and its impact on crop productivity remains limited. Here we investigated OC and TN changes in soil profile down to 100 cm, crop yield, and sustainable yield index under synthetic nitrogen, phosphate, and potassium fertilizers (NPK), NPK plus straw (NPKS), and organic substitution (NPKM) treatments over two decades in four upland fields across different climate zones. Compared with the initial values, two decades of NPKM treatment significantly (p < 0.05) increased OC and TN stocks in either topsoil (by 25.6-103.8 and 15.8-89.8%) or deep soil (by 2.9-71.3 and 5.7-36.9%), respectively, across all sites. The increases in OC and TN stocks in 0-100 cm soil receiving NPKM were significantly higher than those receiving NPK at all sites and NPKS at three high-evaporation sites. Compared with NPKS and NPK treatments, crop yield and N uptake were significantly increased under NPKM treatment only at the Qiyang site. Furthermore, OC sequestration in the entire soil profile down to 100 cm and TN accumulation in topsoil exhibited significant positive correlations with crop N uptake, relative crop yield, and sustainable yield index. In conclusion, long-term partial substitution of synthetic N fertilizer with manure facilitates soil OC and TN sequestration in the entire 100 cm profile and thus maintains high crop productivity in upland areas.
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