203 results for group: agriculture-1
Calcium-mediated stabilisation of soil organic carbon
Mike C. Rowley, Stéphanie Grand & Éric P. Verrecchia
Abstract
Soils play an essential role in the global cycling of carbon and understanding the stabilisation mechanisms behind the preservation of soil organic carbon (SOC) pools is of globally recognised significance. Until recently, research into SOC stabilisation has predominantly focused on acidic soil environments and the interactions between SOC and aluminium (Al) or iron (Fe). The interactions between SOC and calcium (Ca) have typically received less attention, with fewer studies conducted in alkaline soils. Although it has widely been established that exchangeable Ca (CaExch) positiv...
Silicon-augmented resistance of plants to herbivorous insects: a review
O.L. Reynolds, M.G. Keeping, J.H. Meyer
Abstract
Silicon (Si) is one of the most abundant elements in the earth's crust, although its essentiality in plant growth is not clearly established. However, the importance of Si as an element that is particularly beneficial for plants under a range of abiotic and biotic stresses is now beyond doubt. This paper reviews progress in exploring the benefits at two- and three-trophic levels and the underlying mechanism of Si in enhancing the resistance of host plants to herbivorous insects. Numerous studies have shown an enhanced resistance of plants to insect herbivores including folivores, borers, and ...
Assessing biogas digestate, pot ale, wood ash and rockdust as soil amendments: effects on soil chemistry and microbial community composition
Atefeh Ramezanian,A. Sigrun Dahlin,Colin D. Campbell,Stephen Hillier &Ingrid Öborn
Abstract
Applying by-products as soil amendments to agricultural systems is growing in popularity. We aimed to assess the efficacy of some contemporary by-products to provide nutrients to crops as well as the potential harm of adding toxic elements to the environment. Four different by-products widely available in Northern Europe were tested for their effects on two nutrient-poor agricultural soils in terms of increasing available macro- and micro-nutrients as well as toxic elements. Assessing soil microbial community as a sensitive tool for evaluating soil ...
Addition of a volcanic rockdust to soils has no observable effects on plant yield and nutrient status or on soil microbial activity
Atefeh Ramezanian, A. Sigrun Dahlin, Colin D. Campbell, Stephen Hillier, Birgitta Mannerstedt-Fogelfors & Ingrid Öborn
Abstract
Rising costs and pressure on supplies of commercial mineral fertilizers and increasing markets for organically produced foods and feeds have led to a growing interest in soil amendments to supply plant nutrients. Rockdust is a by-product of quarrying and its effectiveness to supply plants with nutrients has been a contested issue and there have been no assessments of its effect on soil biota other than plants. The aim of this study was to assess the effect of a commercially-available volcanic rockdust application on ...
Impacts of enhanced weathering on biomass production for negative emission technologies and soil hydrology
Wagner de Oliveira Garcia, Thorben Amann, Jens Hartmann, Kristine Karstens, Alexander Popp, Lena R. Boysen, Pete Smith, and Daniel Goll
Abstract
Limiting global mean temperature changes to well below 2 ∘C likely requires a rapid and large-scale deployment of negative emission technologies (NETs). Assessments so far have shown a high potential of biomass-based terrestrial NETs, but only a few assessments have included effects of the commonly found nutrient-deficient soils on biomass production. Here, we investigate the deployment of enhanced weathering (EW) to supply nutrients to areas of afforestation–reforestation and naturally growing ...
Elevated growth and biomass along temperate forest edges
Luca L. Morreale, Jonathan R. Thompson, Xiaojing Tang, Andrew B. Reinmann & Lucy R. Hutyra
Abstract
Fragmentation transforms the environment along forest edges. The prevailing narrative, driven by research in tropical systems, suggests that edge environments increase tree mortality and structural degradation resulting in net decreases in ecosystem productivity. We show that, in contrast to tropical systems, temperate forest edges exhibit increased forest growth and biomass with no change in total mortality relative to the forest interior. We analyze >48,000 forest inventory plots across the north-eastern US using a quasi-experimental matching ...
Trace Elements as Fertilizer Micronutrients
Izabela Michalak, Agnieszka Saeid, Katarzyna Chojnacka, Mateusz Gramza
Abstract
Trace elements are important in human, animal, and plant nutrition. One of the main sources of food for humans and animals are plants. Therefore, the effect of trace elements (optimal doses, as well as excess and deficiency) on plant growth is described. Plants use several trace elements in small quantities. In this chapter special attention is paid to boron, cobalt, copper, iodine, iron, molybdenum, manganese, selenium, zinc, silicon, nickel and chlorine as fertilizer micronutrients. The functions of each trace element are described, both with the symptoms of their ...
Increased yield and CO2 sequestration potential with the C4 cereal Sorghum bicolor cultivated in basaltic rock dust-amended agricultural soil
Mike E. Kelland, Peter W. Wade, Amy L. Lewis, Lyla L. Taylor, Binoy Sarkar, M. Grace Andrews, Mark R. Lomas, T. E. Anne Cotton, Simon J. Kemp, Rachael H. James, Christopher R. Pearce, Sue E. Hartley, Mark E. Hodson, Jonathan R. Leake, Steven A. Banwart, David J. Beerling
Abstract
Land-based enhanced rock weathering (ERW) is a biogeochemical carbon dioxide removal (CDR) strategy aiming to accelerate natural geological processes of carbon sequestration through application of crushed silicate rocks, such as basalt, to croplands and forested landscapes. However, the efficacy of the approach when undertaken with basalt, and its potential co-benefits ...
Nitrogen in rock: Occurrences and biogeochemical implications
JoAnn M. Holloway,Randy A. Dahlgren
Abstract
There is a growing interest in the role of bedrock in global nitrogen cycling and potential for increased ecosystem sensitivity to human impacts in terrains with elevated background nitrogen concentrations. Nitrogen-bearing rocks are globally distributed and comprise a potentially large pool of nitrogen in nutrient cycling that is frequently neglected because of a lack of routine analytical methods for quantification. Nitrogen in rock originates as organically bound nitrogen associated with sediment, or in thermal waters representing a mixture of sedimentary, mantle, and meteoric sources of nitrogen. ...
