杨永辉,武继承,丁晋利,张洁梅,潘晓莹,何方.长期免耕对不同土层土壤结构与有机碳分布的影响[J].农业机械学报,2017,48(9):173-182.
YANG Yonghui,WU Jicheng,DING Jinli,ZHANG Jiemei,PAN Xiaoying,HE Fang.Effects of Long-term No-tillage on Soil Structure and Organic Carbon Distribution in Different Soil Layers[J].Transactions of the Chinese Society for Agricultural Machinery,2017,48(9):173-182.
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长期免耕对不同土层土壤结构与有机碳分布的影响   [下载全文]
Effects of Long-term No-tillage on Soil Structure and Organic Carbon Distribution in Different Soil Layers   [Download Pdf][in English]
投稿时间:2017-05-03  
DOI:10.6041/j.issn.1000-1298.2017.09.022
中文关键词:  常规耕作  免耕  土壤结构  土壤有机碳  有机碳贡献率
基金项目:国家自然科学基金项目(U1404404)、国家重点研发计划项目(2017YFD0301102)和河南省农业科学院优秀青年科技基金项目(2016YQ12)
作者单位
杨永辉 河南省农业科学院
农业部作物高效用水原阳科学观测站 
武继承 河南省农业科学院
农业部作物高效用水原阳科学观测站 
丁晋利 郑州师范学院 
张洁梅 河南省农业科学院
农业部作物高效用水原阳科学观测站 
潘晓莹 河南省农业科学院
农业部作物高效用水原阳科学观测站 
何方 河南省农业科学院
农业部作物高效用水原阳科学观测站 
中文摘要:为探明长期翻耕与免耕条件下不同土层深度土壤结构稳定性及其有机碳分布特征,在长期定位试验中分层(0~10cm、10~20cm、…、90~100cm)采集免耕和常规耕作处理下混合土样和原状土样进行土壤结构与有机碳的测定,结果表明:①随着土层的加深,0.5~2.0mm和大于2.0mm粒级团聚体含量表现为逐渐降低的趋势,而其他粒级团聚体含量呈增加趋势。免耕更利于提高大粒级团聚体(>0.5mm)的含量,且土壤结构的稳定性显著提高,其作用深度在50cm以上。②随着土层的加深,土壤总有机碳和活性有机碳均表现为先增加后降低再趋于稳定的趋势。免耕处理在0~80cm土层的土壤总有机碳和活性有机碳均高于常规耕作处理。③随着土层的加深,不同粒级团聚体总有机碳含量呈降低趋势,大粒级团聚体中含有较高的有机碳。免耕更利于0~40cm土层不同粒级团聚体总有机碳含量的提高。随着土壤团聚体粒级的降低,土壤活性有机碳含量呈降低趋势。与常规耕作相比,除0.053~0.250mm粒级团聚体外,免耕提高了0~20cm土层各粒级团聚体中活性有机碳含量。④随着土层的加深,各粒级团聚体中有机碳对土壤总有机碳的贡献率表现为先降低后增加再降低的趋势。不同粒级团聚体中,大于2.0mm和小于0.053mm粒级团聚体有机碳贡献率在0~100cm土层均低于其他粒级团聚体。在0~20cm、30~40cm和90~100cm土层,免耕处理各粒级团聚体有机碳累积贡献率均高于常规耕作。
YANG Yonghui  WU Jicheng  DING Jinli  ZHANG Jiemei  PAN Xiaoying  HE Fang
Henan Academy of Agricultural Sciences;Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture,Henan Academy of Agricultural Sciences;Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture,Zhengzhou Normal University,Henan Academy of Agricultural Sciences;Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture,Henan Academy of Agricultural Sciences;Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture and Henan Academy of Agricultural Sciences;Yuanyang Experimental Station of Crop Water Use, Ministry of Agriculture
Key Words:conventional tillage  no-tillage  soil structure  soil organic carbon  contribution rate of organic carbon
Abstract:In order to investigate the stability of soil structure and the distribution characteristics of organic carbon in different soil depths (0~10cm, 10~20cm,…, 90~100cm) under long-term conventional tillage and no-tillage conditions, mixed soil samples and undisturbed soil samples collected from no-tillage and conventional tillage treatments were designed to measure soil structure and soil organic carbon content. The results indicated that with the increase of soil depth, the contents of aggregates with diameter of 0.5~2.0mm and greater than 2.0mm were gradually decreased, while other particle agglomerates were increased. No-tillage treatment could improve the large aggregates (greater than 0.5mm) content, and significantly improve the stability of soil structure, the effect of depth was more than 60cm. With the increase of soil depth, soil organic carbon and active organic carbon content were increased firstly and then decreased, and then trended to be stable. Soil carbon and active organic carbon of no-tillage treatment in 0~80cm soil layer were higher than that of conventional tillage. With the increase of soil depth, soil aggregates organic carbon content was decreased, while organic carbon content of large aggregates was higher than other size aggregates. No-tillage was more conducive to increase soil organic carbon content of different size aggregates under 0~40cm soil depth. With the decrease of soil aggregates, soil active organic carbon content was decreased. Compared with conventional tillage, except 0.053~0.250mm size aggregate, no-tillage increased active organic carbon content in 0~20cm soil layer of various aggregates. With the increase of soil depth, the contribution rate of organic carbon to soil total organic carbon in different size fractions showed the trend of decreasing first, then increasing and then decreasing. In different aggregates, contribution rate of organic carbon of aggregates with diameter greater than 2.0mm and less than 0.053mm in the 0~100cm soil layer was lower than those of other size aggregates. In 0~20cm, 30~40cm and 90~100cm soil layers, accumulation contribution rate of different aggregates organic carbon of no-tillage treatment was higher than that of conventional tillage.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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