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Effects of straw and biochar addition on soil nitrogen, carbon, and super rice yield in cold waterlogged paddy soils of North China

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文摘 The additions of straw and biochar have been suggested to increase soil fertility, carbon sequestration, and crop productivity of agricultural lands. To our knowledge, there is little information on the effects of straw and biochar addition on soil nitrogen form, carbon storage, and super rice yield in cold waterlogged paddy soils. We performed field trials with four treatments including conventional fertilization system (CK), straw amendment 6 t ha~(–1) (S), biochar amendment 2 t ha~(–1) (C1), and biochar amendment 40 t ha~(–1) (C2). The super japonica rice variety, Shennong 265, was selected as the test crop. The results showed that the straw and biochar amendments improved total nitrogen and organic carbon content of the soil, reduced N_2O emissions, and had little influence on nitrogen retention, nitrogen density, and CO_2 emissions. The S and C1 increased NH_4~+-N content, and C2 increased NO_3~–-N content. Both S and C1 had little influence on soil organic carbon density (SOCD) and C/N ratio. However, C2 greatly increased SOCD and C/N ratio. C1 and C2 significantly improved the soil carbon sequestration (SCS) by 62.9 and 214.0% (P<0.05), respectively, while S had no influence on SCS. C1 and C2 maintained the stability of super rice yield, and significantly reduced CH_4 emissions, global warming potential (GWP), and greenhouse gas intensity (GHGI), whereas S had the opposite and negative effects. In summary, the biochar amendments in cold waterlogged paddy soils of North China increased soil nitrogen and carbon content, improved soil carbon sequestration, and reduced GHG emission without affecting the yield of super rice.
来源 Journal of Integrative Agriculture ,2017,16(5):1064-1074 【核心库】
DOI 10.1016/S2095-3119(16)61578-2
关键词 biochar ; straw ; paddy field ; nitrogen form ; carbon sequestration ; greenhouse gas emission ; rice yield
地址

1. Rice Research Institute, Shenyang Agricultural University, Key Laboratory of Northeast Rice Biology and Breeding, Ministry of Agriculture;;Key Laboratory of Northern japonica Super Rice Breeding, Ministry of Education, Shenyang, 110866  

2. Agronomy College, Shenyang Agricultural University, Shenyang, 110866

语种 英文
文献类型 研究性论文
ISSN 2095-3119
学科 农作物
基金 国家教育部长江学者与创新团队发展计划 ;  the Basic Research Foundation of Shenyang Science and Technology Program, China ;  the Special Fund for Agro-scientific Research in Public Interest of China ;  the Key Technologies R&D Program of China during the 12th Five-Year Plan period ;  supported by the Science and Technology Consulting Program of Chinese Academy of Engineering
文献收藏号 CSCD:5991332

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引证文献 12

1 Chen Wenfu 20 years’ development of super rice in China- The 20th anniversary of the super rice in China Journal of Integrative Agriculture,2017,16(5):981-983
被引 5

2 Guan Song Soil organic carbon associated with aggregate-size and density fractions in a Mollisol amended with charred and uncharred maize straw Journal of Integrative Agriculture,2019,18(7):1496-1507
被引 9

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