数字农科院2.0

Effect Of Rice-Straw Biochar Application O.n Rice (Oryza Sativa) R oot Growth And Nitrogen Utilization In Acidified Paddy Soil

文献类型： 外文期刊

作者： Anwar, Sumera;Chen, Huizhe;Ji, Guangmei;Zhu, Defeng;Xiang, Jing;Zhang, Yuping;Zhang, Yikai;Ji, Guangmei

作者机构：

关键词： Biochar; Liming effect; Adsorption; Root; Nitrogen efficient utilization

期刊名称： INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY

ISSN： 1560-8530

年卷期： 2018 年 20 卷 11 期

页码：

摘要： Soil acidification and low nitrogen (N) utilization efficiency are serious problems in rice production. Biochar has the potential to provide a liming effect and strong nutrient adsorption, leading to soil improvement. This study was conducted to investigate specific root traits in rice and to assess the effect of rice-straw biochar amendment on nitrogen efficient utilization in acidified soil. Addition of 20 g kg(-1) biochar and washed biochar significantly promoted rice growth and the yield increased by over 35% and 24%, respectively, when compared with the control. Application of equivalent lime did not increase the rice yield in either low or high N treatments. Biochar application alleviated soil acidity and improved the available nutrient content. Biochar maintained a high available N during the N depletion period by regulating N adsorption and release in the acidified paddy soil. Biochar or washed biochar amendment was found to significantly improve root growth when compared with the control, particularly root mass and adventitious root length. However, application of equivalent lime only significantly promoted the growth of root system before panicle initiation stage. When compared with the liming effect, the adsorption properties of biochar provided a persistent effect in improving acidified soil. Further studies on long-term effects of biochar addition on crop growth as well as its behavior in soil are required in future. (C) 2018 Friends Science Publishers

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