作物学报2017，Vol.43Issue(1)：72-81,10.DOI:10.3724/SP.J.1006.2017.00072
生物炭对东北冷凉区水稻秧苗根系形态建成与解剖结构的影响
Effect of Biochar on Root Morphogenesis and Anatomical Structure of Rice Cultivated in Cold Region of Northeast China
摘要
Abstract
To explore potential and practical application value of biochar in rice production in the cold region of Northeast China, we added 0-20.0% (w/w) biochar in rice nursery substrate of paddy soil and studied the root morphogenesis and anatomical structure of rice at 30 days after seed germination, The treatment of 5.0% biochar significantly increased the root length, root sur-face area and root volume, with the maximum value for all the root morphological indexes in the treatment of 10.0% biochar. When the biochar added more than 10.0%, the root morphological indexes started to decrease. It was indicated that the increase of root length, root surface area and root volume was the consequence of producing more fine roots. Meanwhile, when 5.0% biochar added in the rice nursery substrate, root epidermis thickness, cortex thickness, sclerenchyma tissue, number of vessels, sectional area of vessels, cortex cavity area, sectional area of whole root and root radius increased in comparison with those of the control. In the treatment of 5.0%-10.0% biochar application, all the indexes of anatomical structure of root reached the maximum. When the biochar added more than 10.0%, all the indexes of anatomical structure of root had a descending trend. It was revealed that the well-developed root epidermis and cortex were the main reason of promoting enlargement of roots when a moderate amount of biochar was added in the rice nursery substrate. Taken together, we conclude that the proper addition of 5.0%-10.0% (w/w) bio-char is advantageous to the elongation, enlargement and formation of well-developed root system ,resulting in improved quality of rice seedlings in the dry rice-nursery of protected area when the paddy soil is used as the nursery substrate in the cold region of Northeast China.关键词
生物炭/水稻/根系形态/解剖结构Key words
Biochar/Rice (Oryza sativaL.)/Root morphology/Anatomical structure引用本文复制引用
周劲松,闫平,张伟明,郑福余,程效义,陈温福..生物炭对东北冷凉区水稻秧苗根系形态建成与解剖结构的影响[J].作物学报,2017,43(1):72-81,10.基金项目
本研究由国家重点研发计划稻作区土壤培肥与丰产增效耕作技术(2016YFD0300904),辽宁省高校重大科技平台建设项目(生物炭工程技术研究中心),沈阳市应用基础研究专项(F16-205-1-38),国家公益性行业(农业)科研专项(201303095)和教育部创新团队项目(IRT13079)资助。 This study was supported by the State Key Special Program of Soil Fertility Improvement and Cropping Innovation for High Yield with High Efficiency in Rice Cropping Areas (2016YFD0300904), the Liaoning Provincial Major Science and Technology Platform for Universities (Biochar Engineering and Technical Research Center), the Shenyang Special Program for Apply Basic Research Program (F16-205-1-38), Special Fund for Agro-scientific Research in the Public Interest Program of China (201303095), and Program for Innovative Research Team of Ministry of Education (IRT13079) （2016YFD0300904）
