tailieunhanh - Carbon dynamics in rice based farming systems of kari soils

An experiment was carried out in rice field of Krishi Vigyan Kendra (KVK), Kumarakom during 2017 to 2018 to study the influence of rice-fish and rice-water fallow systems on carbon dynamics in Kari soil. The samples were analysed for bulk density, soil pH and soil C pools. Bulk density (BD) of the soil showed no significant difference between rice-fish and rice-water fallow systems. | International Journal of Current Microbiology and Applied Sciences ISSN 2319-7706 Volume 8 Number 10 2019 Journal homepage http Original Research Article https Carbon Dynamics in Rice based Farming Systems of Kari Soils S. Chethankumar1 and V. S. Devi2 1College of Agriculture Padannakkad Kerala Agricultural University India 2Krishi Vigyan Kendra Kumarakom Kerala Agricultural University India Corresponding author ABSTRACT Keywords Carbon dynamics Soil organic carbon Rice Kari soils Article Info Accepted 12 September 2019 Available Online 10 October 2019 An experiment was carried out in rice field of Krishi Vigyan Kendra KVK Kumarakom during 2017 to 2018 to study the influence of rice-fish and rice-water fallow systems on carbon dynamics in Kari soil. The samples were analysed for bulk density soil pH and soil C pools. Bulk density BD of the soil showed no significant difference between rice-fish and rice-water fallow systems. However significant difference was recorded between surface and sub surface soils with maximum in sub surface soils. Soil pH soil organic C SOC Particulate organic C POC were found to be higher in rice-fish system compared to rice-water fallow system and surface soil contained higher pH SOC POC than sub surface soil. The treatments found to be non significant with respect to labile C LC . The study revealed that the rice-fish system significantly increased the different C pools soil pH compared to rice-water fallow system in Kari soils. Introduction The soil organic carbon SOC pool is of great concern because it may represent a source as well as a sink of atmospheric CO2 IPCC 2007 and its storage has been widely considered as a measure to mitigate global climate change through carbon sequestration in soil Huang et al. 2010 . The soil may be subjected to loss and gain of organic C depending on soil type vegetation type temperature erosion and land management. Land use and soil management .