Water use efficiency of a maize/cowpea intercrop on a highly acidic tropical soil as affected by liming and fertilizer application

Gaiser, Thomas; Barros, Inácio de; Lange, Frank-Michael; Williams, J

doi:10.1023/b:plso.0000047733.98854.9f

Cited by 36 publications

(20 citation statements)

References 7 publications

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“…This occurs at high precipitation intensities, especially in sandy soils, allowing rapid water fluxes through the soil profile (Gaiser et al, 2004). In addition, the treatments that received N doses had the smallest flux density values in the seasons with the highest water demand in corn, i.e., tasseling (stage I), and flowering and grain filling (stage II), which could be translated as absorption by the plants, since smaller water storage variation values were observed.…”

Section: Internal Drainage and Precipitationmentioning

confidence: 99%

Nitrogen doses and water balance components at phenological stages of corn

Silva¹,

Libardi²,

Fernandes³

2009

Sci. agric. (Piracicaba, Braz.)

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Determining the intensity of the water balance components in the control volume of a soil, and consequently defining the most likely periods of occurrence of a water deficit in a crop, is an exercise that requires knowledge about soil, climate and plant factors. This research aimed to evaluate soil water balance components at phenological stages of corn (Zea mays L.) under no-till system, when fertilized with 60, 120, and 180 kg ha -1 of nitrogen. Runoff was not taken into account. Measurements were made for precipitation (P), internal drainage (D) (or capillary rise) at a 0.8 m depth, and water storage variation (Δh) in the soil layer from 0.0-0.80 m; actual evapotranspiration (ET) was considered the unknown quantity of the equation. Corn grain yield was evaluated as well. In general, the soil water balance components were modified by N doses, because the soil had been relatively smaller Δh in treatments involving N application than in the treatment without N, resulting in smaller D values in those treatments, which resulted in greater absorption by the plants and greater ET. As expected, the plant developmental stage II had a higher ET value. Key words: internal drainage, hydraulic conductivity, actual evapotranspiration, tensiometer, no-till system DOSES DE NITROGÊNIO E COMPONENTES DO BALANÇO HÍDRICO EM FASES FENOLÓGICAS DO MILHORESUMO: Determinar a intensidade dos componentes do balanço de água no solo num certo volume de controle de solo e, por conseguinte, a definição dos períodos mais prováveis de déficit hídrico para a cultura, está relacionada ao conhecimento de fatores do solo, do clima e da planta. Avaliaram-se componentes da equação do balanço de água no solo para fases fenológicas do milho (Zea mays L.), sob sistema de plantio direto, adubado com 60, 120 e 180 kg ha

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Section: Internal Drainage and Precipitationmentioning

confidence: 99%

Nitrogen doses and water balance components at phenological stages of corn

Silva¹,

Libardi²,

Fernandes³

2009

Sci. agric. (Piracicaba, Braz.)

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“…Micro-fertilization APSIM [121][122][123], EPICSEAR [124], MSM [125], DSSAT [126][127][128][129][130][131] In general, the simulations of UPS for semi-arid climates are reported by only a few papers compared to the multitude of papers available on modelling/simulation. We found that 30 out of the 187 papers contained in this review specifically covered the modelling of at least one of the four selected UPS in semi-arid areas.…”

Section: Ups Models and Authors Country Cropsmentioning

confidence: 99%

Crop Upgrading Strategies and Modelling for Rainfed Cereals in a Semi-Arid Climate—A Review

Silungwe

Graef

Bellingrath-Kimura

et al. 2018

Water

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Spatiotemporal rainfall variability and low soil fertility are the primary crop production challenges facing poor farmers in semi-arid environments. However, there are few solutions for addressing these challenges. The literature provides several crop upgrading strategies (UPS) for improving crop yields, and biophysical models are used to simulate these strategies. However, the suitability of UPS is limited by systemization of their areas of application and the need to cope with the challenges faced by poor farmers. In this study, we reviewed 187 papers from peer-reviewed journals, conferences and reports that discuss UPS suitable for cereals and biophysical models used to assist in the selection of UPS in semi-arid areas. We found that four UPS were the most suitable, namely tied ridges, microdose fertilization, varying sowing dates, and field scattering. The DSSAT, APSIM and AquaCrop models adequately simulate these UPS. This work provides a systemization of crop UPS and models in semi-arid areas that can be applied by scientists and planners.

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“…2005) and low leaf area index (LAI) values of Patagonian Monte species (Campanella & Bertiller 2008). Upward movement in the soil matrix is not considered, because it is not important in sandy soils (Gaiser et al . 2004).…”

Section: Methodsmentioning

confidence: 99%

Ecohydrological effects of grazing‐induced degradation in the Patagonian Monte, Argentina

Bisigato

Laphitz

2009

Austral Ecology

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Water-limited ecosystems have undergone rapid change as a consequence of changing land use and climate. The consequences of these changes on soil quality and vegetation dynamics have been documented in different regions of the world. In contrast, their effects on soil water, the most limiting resource in these environments, have received less attention, although in recent years increasing efforts have been made to relate grazing, soil water and vegetation functioning. In this paper, we present the results of field observations of plant phenology and soil water content carried out during two successive years at four sites along a degradation gradient caused by grazing in the Patagonian Monte, Argentina. We also developed a simplified soil water balance model to evaluate how changes in plant cover could affect water balance. Our field observations showed that the soil water content in the soil layer where roots of grasses are abundant (0-25 cm) was higher and the growing cycles were longer in degraded than in preserved sites. Similarly, our modelling approach showed that the deep soil (depth > 10 cm) was wetter in the degraded than in the preserved situation. Simulation also suggested a switch from transpiration to a direct evaporation dominance of water losses with degradation. Although reductions in plant cover related to grazing degradation were associated with a decrease in annual transpiration, the simulated soil water loss by transpiration was higher during summer in the degraded than in the well preserved situation. Thus, our field observations seem to be a consequence of ecohydrological changes causing an accumulation of water in the soil profile during the cold season and its transpiration during summer. In conclusion, our results showed that changes in plant cover caused by grazing disturbance can alter the soil water balance, which in turn can affect vegetation function.

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Water use efficiency of a maize/cowpea intercrop on a highly acidic tropical soil as affected by liming and fertilizer application

Cited by 36 publications

References 7 publications

Nitrogen doses and water balance components at phenological stages of corn

Nitrogen doses and water balance components at phenological stages of corn

Crop Upgrading Strategies and Modelling for Rainfed Cereals in a Semi-Arid Climate—A Review

Ecohydrological effects of grazing‐induced degradation in the Patagonian Monte, Argentina

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