Effects of Soil Management Practices on Water Erosion under Natural Rainfall Conditions on a Humic Dystrudept

Souza, Vinicius Ferreira Chaves de; Bertol, Ildegardis; Wolschick, Neuro Hilton

doi:10.1590/18069657rbcs20160443

Cited by 6 publications

(5 citation statements)

References 26 publications

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“…Aggregation of the soil affects its ability to store and stabilize carbon [31]. Soil aggregation influences water storage and distribution [32] as well as soil functions, reactions, processes, and systems [33]. It is, however, a sensitive indicator of the effects of the timing of soil management implementation and the changes it produces [34].…”

Section: Aggregate Stabilitymentioning

confidence: 99%

Residual Dry Matter, Weeds and Soil Aggregates after Winter Cover Crop

Seidel

Caetano

Karpinski

et al. 2019

JEAI

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Soil quality maintenance in a no-tillage system (NTS) depends on cover crops. They are essential for crop rotation, affect several soil attributes, and contribute to phytosanitary control. However, cover crop efficacy is influenced by their root function and the presence of plant straw on soil surfaces. The objective of this study was to compare various winter cover crops in terms of their effects on dry mass yield, straw persistence after 40 d, weed incidence, and soil aggregate stability. The soil tested was an Oxisol Ustox Hapludox in Western Paraná State, southern Brazil. A randomized block design was used with four replicates and six treatments (fallow, black oat, fodder turnip, field pea, common vetch, and fodder turnip + black oat). Cover crops were managed 88 d after sowing. Dry mass (DM) and residual dry mass (RDM) were measured at 20 d and 40 d after harvest. Aggregate stability and weed type and density were evaluated after 40 d of management (DAM). The results showed that black oat obtained the lowest decomposition; therefore, a potential species to be used in the system of crop rotation in the no-tillage. The consorted of fodder turnip and black oat provided relatively higher dry mass yields and improved soil aggregation. Cover crops reduced the incidence of weeds, being important for no-till sustainability.

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Section: Aggregate Stabilitymentioning

confidence: 99%

Residual Dry Matter, Weeds and Soil Aggregates after Winter Cover Crop

Seidel

Caetano

Karpinski

et al. 2019

JEAI

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“…Seedlings from an open-pollinated seed orchards of Pinus taeda were planted on a Humic Dystrudepts soil (Souza et al, 2017), previously used under grazing by cattle. The seedlings were selected by keeping the same morphological and biometrics characteristics.…”

Section: Study Area and Experimental Designmentioning

confidence: 99%

Initial Growth of Pinus taeda by Fertilization Response at Planting

et al. 2019

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The objective of this study was to evaluate how the fertilizer composition, type and application method contribute to the initial growth of Pinus taeda applied at planting. Seedlings from an open-pollinated seed orchard of Pinus taeda were planted on a Humic Dystrudepts soil containing 15 treatments of fertilizer application at planting. Basal diameter (immediately above ground -about 5 cm) and total height were measured on all live plants after six, 12 and 42 months. The basal diameter at six and 12 months ranged from 0.49 to 0.63 cm and 1.64 to 2.15 cm, respectively. The height at six and 12 months ranged from 0.49 to 0.64 m and 0.77 to 1.01 m, respectively, indicating that fertilizing improved this characteristics in ~30%. Fertilizer composition, type and application method contributed to the first year of growth of Pinus taeda. Nevertheless, fertilization response disappeared after 42 months.

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“…The crop cover is crucial in the estimation of the C (crop management) factor in erosion models such as the Modified Universal Soil Loss Equation (MUSLE) used by SWAT+ (Lin et al, 2014). Other crop management practices, such as the amount of fertilizer, alters the soil's ability to produce biomass and, thus, alters soil resistance to erosion (Souza et al, 2017). The timing and duration of soil cover on cropland are affected by the planting and maturity dates of the crop.…”

Section: Introductionmentioning

confidence: 99%

Improved representation of agricultural land use and crop management for large-scale hydrological impact simulation in Africa using SWAT+

Nkwasa

Chawanda

Jägermeyr

et al. 2022

Hydrol. Earth Syst. Sci.

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Abstract. To date, most regional and global hydrological models either ignore the representation of cropland or consider crop cultivation in a simplistic way or in abstract terms without any management practices. Yet, the water balance of cultivated areas is strongly influenced by applied management practices (e.g. planting, irrigation, fertilization, and harvesting). The SWAT+ (Soil and Water Assessment Tool) model represents agricultural land by default in a generic way, where the start of the cropping season is driven by accumulated heat units. However, this approach does not work for tropical and subtropical regions such as sub-Saharan Africa, where crop growth dynamics are mainly controlled by rainfall rather than temperature. In this study, we present an approach on how to incorporate crop phenology using decision tables and global datasets of rainfed and irrigated croplands with the associated cropping calendar and fertilizer applications in a regional SWAT+ model for northeastern Africa. We evaluate the influence of the crop phenology representation on simulations of leaf area index (LAI) and evapotranspiration (ET) using LAI remote sensing data from Copernicus Global Land Service (CGLS) and WaPOR (Water Productivity through Open access of Remotely sensed derived data) ET data, respectively. Results show that a representation of crop phenology using global datasets leads to improved temporal patterns of LAI and ET simulations, especially for regions with a single cropping cycle. However, for regions with multiple cropping seasons, global phenology datasets need to be complemented with local data or remote sensing data to capture additional cropping seasons. In addition, the improvement of the cropping season also helps to improve soil erosion estimates, as the timing of crop cover controls erosion rates in the model. With more realistic growing seasons, soil erosion is largely reduced for most agricultural hydrologic response units (HRUs), which can be considered as a move towards substantial improvements over previous estimates. We conclude that regional and global hydrological models can benefit from improved representations of crop phenology and the associated management practices. Future work regarding the incorporation of multiple cropping seasons in global phenology data is needed to better represent cropping cycles in areas where they occur using regional to global hydrological models.

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Effects of Soil Management Practices on Water Erosion under Natural Rainfall Conditions on a Humic Dystrudept

Cited by 6 publications

References 26 publications

Residual Dry Matter, Weeds and Soil Aggregates after Winter Cover Crop

Residual Dry Matter, Weeds and Soil Aggregates after Winter Cover Crop

Initial Growth of Pinus taeda by Fertilization Response at Planting

Improved representation of agricultural land use and crop management for large-scale hydrological impact simulation in Africa using SWAT+

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