Soil and water conservation measures improve soil carbon sequestration and soil quality under cashews

作     者：Gopal Ramdas Mahajan Bappa Das Sandrasekaran Manivannan Begur Lakshminarasimha Manjunath Ram Ratan Verma Sujeet Desai Rahul Mukund Kulkarni Ashish Marotrao Latar Reshma Sale Dayesh Murgaonkar Kiran Puna Patel Shaiesh Morajkar Ashwini Desai Natasha Barnes Heena Mulla Gopal Ramdas Mahajan;Bappa Das;Sandrasekaran Manivannan;Begur Lakshminarasimha Manjunath;Ram Ratan Verma;Sujeet Desai;Rahul Mukund Kulkarni;Ashish Marotrao Latare;Reshma Sale;Dayesh Murgaonkar;Kiran Puna Patel;Shaiesh Morajkar;Ashwini Desai;Natasha Barnes;Heena Mulla

作者机构：Natural Resource Management ICAR-Central Coastal Agricultural Research Institute ICAR-Indian Institute of Soil and Water Conservation Regional Centre Division of Fruit Crops ICAR-Indian Institute of Horticultural Research Division of Crop Production Indian Institute of Sugarcane Research Institute of Agricultural Sciences Banaras Hindu University Biological Oceanography Division CSIReNational Institute of Oceanography Goa University 

出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))

年 卷 期：2021年第36卷第2期

页      面：190-206页

核心收录：

学科分类：082802[工学-农业水土工程] 090707[农学-水土保持与荒漠化防治] 0907[农学-林学] 08[工学] 0828[工学-农业工程] 09[农学] 0815[工学-水利工程] 

基　　金：the Indian Council of Agricultural Research (ICAR)  New Delhi  India for providing financial support to do this research 

主　　题：Land degradation Microbial activity Microbial biomass carbon Minimum dataset Soil erosion Western Ghats 

摘      要：Land degradation is becoming a serious problem in the west coast region of India where one of the world’s eight biodiversity hotspots, the ‘Western Ghats’, is present. Poor land management practices and high rainfall have led to increasing problems associated with land degradation. A long-term(13-year)experiment was done to evaluate the impact of soil and water conservation measures on soil carbon sequestration and soil quality at three different depths under cashew nut cultivation on a 19% slope. Five soil and water conservation measures-continuous contour trenches, staggered contour trenches, halfmoon terraces, semi-elliptical trenches, and graded trenches all with vegetative barriers of Stylosanthes scabra and Vetiveria zizanoides and control were evaluated for their influence on soil properties,carbon sequestration, and soil quality under cashews. The soil and water conservation measures improved significantly the soil organic carbon, soil organic carbon stock, carbon sequestration rate and microbial activity compared to the control condition(without any measures). Among the measures tested, continuous contour trenches with vegetative barriers outperformed the others with respect to soil organic carbon stock, sequestration rate, and microbial activity. The lower metabolic quotient with the measures compared to the control indicated alleviation of environmental stress on microbes. Using principal component analysis and a correlation matrix, a minimum dataset was identified as the soil available nitrogen, bulk density, basal soil respiration, soil p H, acid phosphatase activity, and soil available boron and these were the most important soil properties controlling the soil quality. Four soil quality indices using two summation methods(additive and weighted) and two scoring methods(linear and non-linear) were developed using the minimum dataset. A linear weighted soil quality index was able to statistically differentiate the effect of soil and water conservation me