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当前位置: 首页 > 文章 > Effects of straw and biochar addition on soil nitrogen, carbon, and super rice yield in cold waterlogged paddy soils of North China 农业科学学报 (英文) 2017,16 (5)
Position: Home > Articles > Effects of straw and biochar addition on soil nitrogen, carbon, and super rice yield in cold waterlogged paddy soils of North China Journal of Integrative Agriculture 2017,16 (5)

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

作  者：
Cui Yue-feng;Meng Jun;Wang Qing-xiang;Zhang Wei-ming;Cheng Xiao-yi;Chen Wen-fu
单  位：
Tieling Acad Agr Sci, Tieling 112616, Peoples R China;Shenyang Agr Univ, Agron Coll, Shenyang 110866, Peoples R China;Shenyang Agr Univ, Rice Res Inst, Key Lab Northeast Rice Biol & Breeding,Minist Edu, Minist Agr,Key Lab Northern Japonica Super Rice B, Shenyang 110866, Peoples R China
关键词：
biochar;straw;paddy field;nitrogen form;carbon sequestration;greenhouse gas emission;rice yield
摘  要：
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 he (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 N2O emissions, and had little influence on nitrogen retention, nitrogen density, and CO2 emissions. The S and Cl increased NH4+-N content, and C2 increased NO3+-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 CH4 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.

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