您好，欢迎访问江西省农业科学院 机构知识库！

Long-Term Effect of Fertilizations on Yield Sustainability, Soil Organic Carbon Sequestration and Apparent Phosphorus Balance in Acidic Paddy Soil

文献类型： 外文期刊

作者： Garba, Hayatu Nafiu 1 ; Liu Yiren 4 ; Zhang Shuxiang 1 ; Liu Kailou 4 ; Huang Jing 1 ; Lv Zhenzhen 2 ; Hou Hongqian 2 ; Lan Xianjin 2 ; Ji Jianhua 2 ; Han Tianfu 2 ; Khan, Muhammad Numan 1 ; Daba, Nano Alemu 1 ; Qaswar, Muhammad 5 ; Zhang Huimin 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.Jiangxi Acad Agr Sci, Soil & Fertilizer & Resources & Environm Inst, Nanchang 330200, Jiangxi, Peoples R China

3.Usmanu Danfodiyo Univ, Fac Agr, Dept Soil Sci & Agr Engn, Sokoto 2346, Nigeria

4.Minist Agr, Jiangxi Inst Red Soil, Sci Observat & Expt Stn Arable Land Conservat Jia, Natl Engn & Technol Res Ctr Red Soil Improvement, Nanchang 331717, Jiangxi, Peoples R China

5.Ghent Univ Belgium, Fac Biosci Engn, Dept Environm, B-9000 Ghent, Belgium

关键词： Apparent phosphorus balance; Carbon sequestration; Manure; Paddy rice; Sustainable yield index

期刊名称：JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION （ 影响因子：3.61； 五年影响因子：3.581 ）

ISSN： 0718-9508

年卷期：

页码：

收录情况： SCI

摘要： Fertilizer management in an intensively managed cropland is vital to achieve sustainable crop yield. Yet, data on the mechanism of yield sustainability response to manure substitution is limited. We quantitatively studied yield sustainability through soil nutrients' stoichiometry, carbon (C) sequestration, and apparent phosphorus (P) balance in a 35-year long-term trial under double rice cropping pattern in Southern China. The study consisted of five treatments: CK (control), NPK (chemical nitrogen, phosphorus, and potassium fertilizers), NPKM1 (30% manure; 70% chemical NPK fertilizers), NPKM2 (50% manure; 50% chemical NPK fertilizers), and NPKM3 (70% manure; 30% chemical NPK fertilizers). The combined treatments increased yield trend, sustainability index (SYI), C sequestration, P uptake, and sensitivity index, but had little effect on the coefficient of variation of the crop yield compared with the NPK treatment. The apparent P balance in fertilizer treatments has exceeded the environmental risk threshold of 35 kg ha(-1) year(-1). The path analysis showed that soil organic carbon (SOC) directly affected total P (TP), while SOC and TP indirectly affected yield by directly changing soil C:N:P stoichiometry. The critical values of C:N, C:P, and N:P ratios above which SYI declined were 10.8, 23.0, and 1.7, respectively. We concluded that organic amendment substitution had significant effect on yield sustainability and C sequestration, functioned as a C-sink, and revealed potential for P buildup. Therefore, substitution of chemical fertilizers by manure should be done with caution to avert excess P accumulation and loss to the environment. Also, the critical values of soil C:N:P stoichiometric ratios should be taken into cognizance during paddy soil management.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：江西省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台