Ability of different plant species to promote microbiological processes in semiarid soil |
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| Institution: | 1. College of Grassland Science, Gansu Agricultural University, Key Laboratory of Grassland Ecosystem, Gansu Agricultural University, Lanzhou, People’s Republic of China;2. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, Gansu, 730070, People’s Republic of China;3. Animal Husbandry, Pasture and Green Agriculture Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu, 730070, People’s Republic of China;1. Department of Geography and Environment, Bar Ilan University, Ramat-Gan 5290002, Israel;2. Department of Geography and Environmental Development, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel;3. Jacob Blaustein Institute of Desert Research, University of Beer Sheva, Sde Boker 8499000, Israel;1. Departamento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, Ctra. Utrera Km1, Seville, Spain;2. Department of Sciences for Nature and Environmental Resources, University of Sassari, Via Enrico de Nicola, n 9, 07100 Sassari, Italy;3. Centre of Excellence PLECO (Plant and Ecosystems), Department of Biology, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium;1. Department of Science, Information Technology and Innovation, P.O. Box 5078, Brisbane, QLD 4001, Australia;2. Faculty of Agriculture and Environment, The University of Sydney, NSW 2006, Australia;3. School of Food and Agriculture Science, The University of Queensland, St Lucia, Qld 4072, Australia;1. State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science Lanzhou, Gansu 730000, China;2. State Key Laboratory of Grassland Agro-Ecosystem, Institute of Arid AgroEcology, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, China;3. Department of Environmental Sciences, University of Virginia, Charlottesville, VA 22904, USA;4. Collaborative Innovation Center of Henan Grain Crops, Agronomy College of Henan Agricultural University, Zhengzhou, Henan 450002, China |
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| Abstract: | In semiarid climate soils, the establishment of a plant cover is fundamental to avoid degradation and desertification processes. A better understanding of the ability of plants to promote soil microbial processes in these conditions is necessary for successful soil reclamation. Six different plant species were planted in a semiarid soil, in order to know which species are the most effective for the reclamation of semiarid areas. Six years after planting, the rhizosphere soils were studied by measuring chemical (pH, electrical conductivity, total organic carbon and other carbon fractions), physical (% of saggregates), microbiological (microbial biomass carbon and soil respiration), and biochemical (dehydrogenase, phosphatase, β-glucosidase and urease activities) parameters. In general, in all the soil–plant systems plant nutrients, organic matter and microbial activity increased compared to the control soil. For some species, such as Rhamnus lycioides, the increase in the total organic carbon content (TOC) in the rhizosphere zone was almost 200%. A positive correlation was found between TOC and water-soluble carbon (p<0.001); both parameters were negatively correlated with electrical conductivity. Microbial biomass carbon and soil respiration were highest in the rhizosphere of Stipa tenacissima (98% and 60%, respectively, of increase on soil control values) and Rosmarinus officinalis (94% and 51%, respectively, of increase on soil control values). These microbiological parameters were correlated with the percentage of stable aggregates (p<0.01). Enzyme activities were affected by the rhizosphere, their values depending on the shrub species. |
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