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Fertilization Affects Biomass Production of Suaeda salsa and Soil Organi（ Carbon Pool in East Coastal Region of China

ISSN号：1673-6710
期刊名称：《中国新生儿科杂志》
时间：0
分类：S153.6[农业科学—土壤学;农业科学—农业基础科学] S714.2[农业科学—林学]
作者机构：[1]State Key Laboratory of Soil and Sustainable Agriculture, Nanjing Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 P.R. China, [2]Dongtai Institute of Tidal Flat Research, Nanjing Branch of the Chinese Academy of Sciences, Dongtai 224200, P..R. China, [3]School of Resources and Environments, Northeast Agriculture University, Harbin 150030, P.R.China
相关基金：The authors sincerely thank the staff of Soil Physics and Salinization Laboratory, Institute of Soil Science, Chinese Academy of Sciences. The authors are grateful for the financial support of the Special Fund for Public-Welfare Industrial （Agriculture） Research of China （200903001）, the National Natural Science Foundation of China （41171181, 41101199）, the Key Technology R＆D Program of Jiangsu Province, China （BE2010313）, and the Prospective Project of Production Education Research Cooperation of Jiangsu Province, China （BY2010013）.

作者： MENG Qing-feng[1,3] YANG Jing-song[1,2] YAO Rong-jiang[1,2] LIU Guang-ming[1,2] YU Shi-peng[1,2]

关键词：碳库管理指数, 中国沿海地区, 土壤理化性质, 测土配方施肥, 物质生产, 盐地碱蓬, 土壤有机碳库, 土地利用, Suaeda salsa production, coastal tidal lands, N and P application, soil organic carbon, labile organic carbon,carbon management index

中文摘要：

Land use practice significantly affects soil properties. Soil is a major sink for atmospheric carbon, and soil organic carbon （SOC） is considered as an essential indicator of soil quality. The objective of this study was to assess the effects of N and P applied to Suaeda salsa on biomass production, SOC concentration, labile organic carbon （LOC） concentration, SOC pool and carbon management index （CMI） as well as the effect of the land use practice on soil quality of coastal tidal lands in east coastal region of China. The study provided relevant references for coastal exploitation, tidal land management and related study in other countries and regions. The field experiment was laid out in a randomized complete block design, consisting of four N-fertilization rates (0 （N0）, 60 （N1）, 120 （N2） and 180 kg ha-1 （N3）), three P-fertilization rates (0 （P0）, 70 （P1） and 105 kg ha-1 （P2）) and bare land without vegetation. N and P applied to S. salsa on coastal tidal lands significantly affected biomass production （above-ground biomass and roots）, bulk density （ρb）, available N and P, SOC, LOC, SOC pool and CMI. Using statistical analysis, significantly interactions in N and P were observed for biomass production and the dominant factor for S. salsa production was N in continuous 2-yr experiments. There were no significant interactions between N and P for SOC concentration, LOC concentration and SOC pool. However, significant interaction was obtained for CMI at the 0-20 cm depth and N played a dominant role in the variation of CMI. There were significant improvements for soil measured attributes and parameters, which suggested that increasing the rates of N and P significantly decreased ρbat the 0-20 cm depth and increased available N and P, SOC, LOC, SOC pool as well as CMI at both the 0-20 and 20-40 cm depth, respectively. By correlation analysis, there were significantly positive correlations between biomass （above- ground biomass and roots） and SOC as well as LOC in

英文摘要：

Land use practice significantly affects soil properties. Soil is a major sink for atmospheric carbon, and soil organic carbon （SOC） is considered as an essential indicator of soil quality. The objective of this study was to assess the effects of N and P applied to Suaeda salsa on biomass production, SOC concentration, labile organic carbon （LOC） concentration, SOC pool and carbon management index （CMI） as well as the effect of the land use practice on soil quality of coastal tidal lands in east coastal region of China. The study provided relevant references for coastal exploitation, tidal land management and related study in other countries and regions. The field experiment was laid out in a randomized complete block design, consisting of four N-fertilization rates （0 （NO）, 60 （N1）, 120 （N2） and 180 kg ha-1 （N3））, three P-fertilization rates （0 （P0）, 70 （P1） and 105 kg ha-~ （P2）） and bare land without vegetation. N and P applied to S. salsa on coastal tidal lands significantly affected biomass production （above-ground biomass and roots）, bulk density （Pb）, available N and P, SOC, LOC, SOC pool and CMI. Using statistical analysis, significantly interactions in N and P were observed for biomass production and the dominant factor for S. salsa production was N in continuous 2-yr experiments. There were no significant interactions between N and P for SOC concentration, LOC concentration and SOC pool. However, significant interaction was obtained for CMI at the 0-20 cm depth and N played a dominant role in the variation of CMI. There were significant improvements for soil measured attributes and parameters, which suggested that increasing the rates of N and P significantly decreased Pb at the 0-20 cm depth and increased available N and P, SOC, LOC, SOC pool as well as CMI at both the 0-20 and 20-40 cm depth, respectively. By correlation analysis, there were significantly positive correlations between biomass （above- ground biomass and roots） and SOC as well as