水稻种植对沿海滩涂土壤有机碳及碳库管理指数的影响  

Effects of rice cultivation on soil organic carbon and carbon pool management index in coastal areas

作　　者：张蛟[1] 崔士友[1] 胡帅栋 翟彩娇 汪波[1] ZHANG Jiao;CUI Shi-you;HU Shuai-dong;ZHAI Cai-jiao;WANG Bo(Jiangsu Yanjiang Institute of Agricultural Sciences,Nantong Jiangsu 226541;Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration,Zhejiang A&F University,Lin’an Zhejiang 311300)

机构地区：[1]江苏沿江地区农业科学研究所,江苏南通226541 [2]浙江农林大学,浙江省森林生态系统碳循环与固碳减排重点实验室,浙江临安311300

出　　处：《中国土壤与肥料》2020年第3期107-112,共6页Soil and Fertilizer Sciences in China

基　　金：国家科技支撑计划(2015BAD01B03);江苏省重点研发计划(现代农业)(BE2015337);南通市科技项目(JC2019150);南通市第五期226人才培养工程项目(NT201722620);沿江所所青年基金[YJ(2019)004]。

摘　　要：研究沿海滩涂种植水稻对土壤有机碳和碳库管理指数的影响,探讨滩涂稻田土壤有机碳与盐分变化之间的相关关系,将为评价沿海滩涂稻田土壤质量变化提供科学依据。2016年水稻收获后,在江苏沿海滩涂如东方凌垦区,设置种稻0年(CK,0-Y)、种稻1年(1-Y)和种稻4年(4-Y)田块处理进行土壤采样,测定土壤盐分、土壤有机碳(SOC)及活性有机碳(AOC),并计算碳库指数(CPI)、碳库活度指数(AI)和碳库管理指数(CMI)。结果表明:(1)与CK相比,1-Y和4-Y田块在0~10、10~20和20~30 cm土层盐分均显著降低,且1-Y和4-Y田块在各土层分别降低了94.38%和92.77%、86.57%和85.94%、77.48%和77.91%(P<0.05),同时1-Y和4-Y田块之间盐分在0~30 cm土层均没有显著的差异(P>0.05);(2)1-Y和4-Y田块在0~10、10~20和20~30 cm土层有机碳均显著提高,且各层分别提高了36.11%和69.17%、37.64%和69.20%、36.42%和57.50%(P<0.05);1-Y和4-Y田块在各土层活性有机碳也均显著提高,且各层分别提高了85.63%和101.20%、89.26%和110.04%,158.70%和243.59%(P<0.05);(3)沿海滩涂种植水稻后对CPI、AI和CPMI提高均有明显的积极作用,且相比1-Y田块,4-Y田块的稻田耕层0~30 cm的CPI和CPMI均有一定的提高;(4)沿海滩涂稻田0~30 cm土层中,土壤盐分与有机碳及活性有机碳之间均具有极显著的幂函数相关(P<0.01)。可见,沿海滩涂种植水稻后能降低稻田土壤盐分,提高土壤有机碳、活性有机碳及碳库管理指数,进而改善沿海滩涂稻田土壤质量和提高土壤肥力。s:Effects of rice cultivation on soil organic carbon and carbon pool management index and changes in the relationship between soil organic carbon and salinity were investigated to provide scientific basis for evaluating the changes in soil quality in the paddy fields of coastal areas.A field experiment including 0 year’s field(CK,0-Y),1 year’s field(1-Y)and 4 year’s field(4-Y)for planting rice was conducted in coastal areas in Rudong,Jiangsu Province.After the rice harvest in 2016,the soil samples of representative fields were collected for determiningsoil salinity,soil organic carbon(SOC)and active organic carbon(AOC)and calculating carbon pool index(CPI),carbon pool activity index(AI)and carbon pool management index(CPMI)at soil depth of 0~10,10~20 and 20~30 cm.Results showed that:(1)Compared with CK plots,soil salinity at soil depth of 0~30 cm declined significantly in 1-Y and 4-Y plots(P<0.05)and soil salinity at soil depth of 0~10,10~20 and 20~30 cm were decreased by 94.38%and 92.77%,86.57%and 85.94%,77.48%and 77.91%,respectively,in 1-Y and 4-Y plots,but had no significant differences between 1-Y and 4-Y plots at soil depth of 0~30 cm(P>0.05);(2)Soil organic carbon at soil depth of 0~30 cm increased significantly in 1-Y and 4-Y plots(P<0.05)and soil organic carbon at soil depth of 0~10,10~20 and 20~30 cm increased by 36.11%and 69.17%,37.64%and 69.20%,36.42%and 57.50%,respectively,in 1-Y and 4-Y plots;soil organic carbon at soil depth of 0~30 cm also increased significantly in 1-Y and 4-Y plots(P<0.05)and soil organic carbon at soil depth of 0~10,10~20 and 20~30 cm increased by 85.63%and 101.20%,89.26%and 110.04%,158.70%and 243.59%,respectively,in 1-Y and 4-Y plots;(3)The cultivation of rice had significantly positive impacts on the increase of CPI,AI and CPMI in coastal areas,and the CPI and CPMI at soil depth of 0~30 cm had a certain increase in 4-Y plots compared with 1-Y plots;(4)Soil salinity had significant power functions correlation with soil organic carbon and active organic carbonat depth of 0

关 键 词：沿海滩涂 稻田 活性有机碳 碳库管理指数 土壤质量 

分 类 号：S511[农业科学—作物学] S153.6