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Juglans regia (walnut) in temperate arable agroforestry systems : effects on soil characteristics, arthropod diversity and crop yield

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Abstract
Agroforestry (AF) is considered to be a sustainable land use practice as it combines agricultural production with multiple beneficial effects such as carbon sequestration, enhanced nutrient cycling and increased biodiversity. Quantification of these beneficial effects in temperate arable fields is still limited, however, and most studies focus on one sole parameter (i.e., impact on crop productivity, soil quality, biodiversity, etc.). Combined effects are only rarely considered, resulting in a lack of integrated quantification. Here we assess the effect of rows of walnut trees (Juglans regiaL.) on soil organic carbon (SOC), soil nutrient status, the presence of potentially beneficial ground-dwelling arthropods and on the yield and quality of neighboring arable crops. Significantly higher SOC and soil nutrient concentrations were found near the trees, which is assumed to be primarily a result of tree leaf litter input. Abundance of macro-detritivorous arthropods was increased in and near the tree rows, whereas only limited effects of tree presence were found on the presence of the predatory arthropod taxa under study. The yield of all crops under study was reduced as a result of tree presence, with the strongest reductions observed for grain maize and sugar beet near the trees (<10 m). In addition, alteration of crop quality was observed near tree rows with decreased dry matter concentration of grain samples and increased crude protein concentration of winter cereals.
Keywords
Arable crop yield, functional biodiversity, soil nutrients, soil organic carbon, tree rows, walnut, DEFINING COMPETITION VECTORS, ORGANIC-CARBON, ECOSYSTEM SERVICES, SOUTHERN ONTARIO, INTERCROPPING SYSTEMS, NATURAL ENEMIES, AGRICULTURAL INTENSIFICATION, SILVOARABLE AGROFORESTRY, POPLAR PLANTATION, MIDWESTERN USA

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MLA
Pardon, Paul, et al. “Juglans Regia (Walnut) in Temperate Arable Agroforestry Systems : Effects on Soil Characteristics, Arthropod Diversity and Crop Yield.” RENEWABLE AGRICULTURE AND FOOD SYSTEMS, vol. 35, no. 5, 2020, pp. 533–49, doi:10.1017/s1742170519000176.
APA
Pardon, P., Mertens, J., Reubens, B., Reheul, D., Coussement, T., Elsen, A., … Verheyen, K. (2020). Juglans regia (walnut) in temperate arable agroforestry systems : effects on soil characteristics, arthropod diversity and crop yield. RENEWABLE AGRICULTURE AND FOOD SYSTEMS, 35(5), 533–549. https://doi.org/10.1017/s1742170519000176
Chicago author-date
Pardon, Paul, Jan Mertens, Bert Reubens, Dirk Reheul, Tom Coussement, Annemie Elsen, Victoria Nelissen, and Kris Verheyen. 2020. “Juglans Regia (Walnut) in Temperate Arable Agroforestry Systems : Effects on Soil Characteristics, Arthropod Diversity and Crop Yield.” RENEWABLE AGRICULTURE AND FOOD SYSTEMS 35 (5): 533–49. https://doi.org/10.1017/s1742170519000176.
Chicago author-date (all authors)
Pardon, Paul, Jan Mertens, Bert Reubens, Dirk Reheul, Tom Coussement, Annemie Elsen, Victoria Nelissen, and Kris Verheyen. 2020. “Juglans Regia (Walnut) in Temperate Arable Agroforestry Systems : Effects on Soil Characteristics, Arthropod Diversity and Crop Yield.” RENEWABLE AGRICULTURE AND FOOD SYSTEMS 35 (5): 533–549. doi:10.1017/s1742170519000176.
Vancouver
1.
Pardon P, Mertens J, Reubens B, Reheul D, Coussement T, Elsen A, et al. Juglans regia (walnut) in temperate arable agroforestry systems : effects on soil characteristics, arthropod diversity and crop yield. RENEWABLE AGRICULTURE AND FOOD SYSTEMS. 2020;35(5):533–49.
IEEE
[1]
P. Pardon et al., “Juglans regia (walnut) in temperate arable agroforestry systems : effects on soil characteristics, arthropod diversity and crop yield,” RENEWABLE AGRICULTURE AND FOOD SYSTEMS, vol. 35, no. 5, pp. 533–549, 2020.
@article{8618506,
  abstract     = {{Agroforestry (AF) is considered to be a sustainable land use practice as it combines agricultural production with multiple beneficial effects such as carbon sequestration, enhanced nutrient cycling and increased biodiversity. Quantification of these beneficial effects in temperate arable fields is still limited, however, and most studies focus on one sole parameter (i.e., impact on crop productivity, soil quality, biodiversity, etc.). Combined effects are only rarely considered, resulting in a lack of integrated quantification. Here we assess the effect of rows of walnut trees (Juglans regiaL.) on soil organic carbon (SOC), soil nutrient status, the presence of potentially beneficial ground-dwelling arthropods and on the yield and quality of neighboring arable crops. Significantly higher SOC and soil nutrient concentrations were found near the trees, which is assumed to be primarily a result of tree leaf litter input. Abundance of macro-detritivorous arthropods was increased in and near the tree rows, whereas only limited effects of tree presence were found on the presence of the predatory arthropod taxa under study. The yield of all crops under study was reduced as a result of tree presence, with the strongest reductions observed for grain maize and sugar beet near the trees (<10 m). In addition, alteration of crop quality was observed near tree rows with decreased dry matter concentration of grain samples and increased crude protein concentration of winter cereals.}},
  author       = {{Pardon, Paul and Mertens, Jan and Reubens, Bert and Reheul, Dirk and Coussement, Tom and Elsen, Annemie and Nelissen, Victoria and Verheyen, Kris}},
  issn         = {{1742-1705}},
  journal      = {{RENEWABLE AGRICULTURE AND FOOD SYSTEMS}},
  keywords     = {{Arable crop yield,functional biodiversity,soil nutrients,soil organic carbon,tree rows,walnut,DEFINING COMPETITION VECTORS,ORGANIC-CARBON,ECOSYSTEM SERVICES,SOUTHERN ONTARIO,INTERCROPPING SYSTEMS,NATURAL ENEMIES,AGRICULTURAL INTENSIFICATION,SILVOARABLE AGROFORESTRY,POPLAR PLANTATION,MIDWESTERN USA}},
  language     = {{eng}},
  number       = {{5}},
  pages        = {{533--549}},
  title        = {{Juglans regia (walnut) in temperate arable agroforestry systems : effects on soil characteristics, arthropod diversity and crop yield}},
  url          = {{http://dx.doi.org/10.1017/s1742170519000176}},
  volume       = {{35}},
  year         = {{2020}},
}

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