How important is plant litter to the regulation of mineral‐N leaching to streams in winter? An observations‐led experimental approach

Riaz, Muhammad; Mian, Ishaq Ahmad; Cresser, Malcolm S.

doi:10.1111/j.1475-2743.2010.00306.x

Cited by 6 publications

(4 citation statements)

References 29 publications

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“…This material can reach the river through runoff and be leached in subsurface runoff. Riaz, Mian and Cresser (2011) demonstrated the importance of leaf litter in ammonium leaching through the decrease of mineral nitrogen during the summer months in a prairie acid soil.…”

Section: Resultsmentioning

confidence: 99%

Water quality change of rivers during rainy events in a watershed with different land uses in Southern Brazil

Girardi

Pinheiro

Garbossa

et al. 2016

RBRH

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High frequency monitoring in environmental studies is increasingly being used due to the availability of equipment and quick response. With high frequency time series, it is possible to extract short-term responses during and after a rain event, which is not captured by conventional monitoring. The aim of this study is to evaluate the superficial water quality change of a stream in a preserved area in Atlantic Forest by short-term data (hour interval). The Cubatão do Sul watershed is located in the Central Coast region of the state of Santa Catarina in Brazil. Rain height and water quality parameters were monitored using rain gauge and multiparameter probes. Two fluviometric sections were also monitored -one in Vargem do Braço stream (FS1), which is mainly native forest (dense ombrophilous forest), and the other in Cubatão do Sul River (FS2), which is influenced by urban, agricultural and sand extraction uses. The temperature and nitrate ion permanency curve in FS1 showed slightly lower values during rainy events, but an opposite behavior was observed for turbidity. On the other hand, the permanency curves during rainy periods of FS2 presented lower conductivity and ammonium ion. When the dry and rainy periods were statistically compared, there was a significant difference for temperature, conductivity, pH, nitrate ion, turbidity and dissolved oxygen for FS1, and temperature, conductivity and turbidity for FS2. The water quality of the Cubatão do Sul watershed is influenced by stream flow and has a short-term time response considering the rain events. The oscillation of the monitored parameters between two periods, dry and rainy, is smaller in native forest than urban and rural land use.Keywords: Atlantic Forest; Serra do Tabuleiro; High frequency monitoring; Background area. RESUMOO monitoramento ambiental de alta frequência está sendo cada vez mais utilizado, devido à disponibilidade de equipamentos e pela resposta rápida gerada. As séries temporais de alta frequência mostram que as respostas de curto prazo, durante e após a ocorrência de chuva não são capturados por programas de monitoramento convencionais. Este trabalho teve por objetivo a avaliação da alteração da qualidade da água de escoamento fluvial em uma bacia hidrográfica em unidade de conservação no bioma Mata Atlântica, com resposta de curto prazo, devido a ocorrência de evento de chuva, monitorado em intervalo de tempo horário. A Bacia do Rio Cubatão do Sul localiza-se na zona Litoral Centro de Santa Catarina, Brasil. Foram monitorados a altura de chuva, por meio de pluviógrafo e parâmetros de qualidade das águas, com o uso de sondas multiparâmetros. Foram monitoradas duas seções fluviométricas, uma no rio Vargem do Braço (FS1), que localiza-se em situação praticamente natural, com predominância de Floresta Ombrófila Densa e outra no rio Cubatão do Sul (FS2) que possui influência de área urbana, agrícola e extração de areia. As curvas de permanência da temperatura e do íon nitrato na FS1 apresentaram valores levemente inferiores no período...

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Section: Resultsmentioning

confidence: 99%

Water quality change of rivers during rainy events in a watershed with different land uses in Southern Brazil

Girardi

Pinheiro

Garbossa

et al. 2016

RBRH

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“…The organic debris on the soil surface in the ADE field would have increased biological activity, and thus a concomitant increase in demand for N, whereas the demand for N from microbial communities would not have been nearly as great in the ADW field. Riaz et al. (2011) observed that greater amounts of organic debris decreased N mineralization and thus resulted in a concomitant decrease in NO 3 ‐N leaching.…”

Section: Discussionmentioning

confidence: 97%

Managing farmed closed depressional areas using blind inlets to minimize phosphorus and nitrogen losses

Smith

Livingston

2013

Soil Use and Management

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Closed depressions are sites within a landscape from glacial origin in which runoff water tends to collect because there is no natural outlet. When farmed, this water is often drained via a tile riser, a vertical tube that connects the bottom of the low point of a closed depression with the subsurface tile drainage network. Two field‐sized closed depressions (ca. 4 ha) and two small catchments (ca. 300 ha) were used to test the hypothesis that water quality could be improved by replacing tile risers with blind inlets, ca. 18 m2 holes filled to 1 m depth so that a high infiltration capacity was attained. At the field scale discharge, sediment and nutrient loads were lower when drained with the blind inlet compared to the tile riser. Late Spring 2010 was much wetter than normal, and increased nutrient loading was observed in both small catchments compared with previous years. In 2010, discharge and total P loading from Catchment AME (control catchment drained with tile risers) increased 417% and 737%, respectively, compared to the mean for the six previous years, whereas in Catchment BME (treatment catchment drained with blind inlets), there was only a 64% and 92% increase, respectively. Results from this study indicate that replacing tile risers with blind inlets to drain closed depressions may be one method to effectively reduce nutrient and sediment loading to Lake Erie and other sensitive water bodies that lie in landscapes formed by Wisconsin, Weichselian or Devensian glaciation.

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“…These practical constraints and limitations to operationally defined soil handling and storage procedures following field sampling can introduce significant differences in N concentrations due to N speciation during transportation and storage (Mian et al, 2011). The implication of mishandling soil and the resulting analysis is that inadequate N fertilizer recommendation rates are made.…”

Section: Opportunities For Application Of Sensor-based N Recommendatimentioning

confidence: 99%

“…The implication of mishandling soil and the resulting analysis is that inadequate N fertilizer recommendation rates are made. To circumvent N speciation problems given that drying soil samples can increase soil N analysis (Miransari & Mackenzie, 2011), on-site treatment of soil with extractant was suggested (Mian et al, 2011). This practice has not gained much, if any, significant traction.…”

Section: Opportunities For Application Of Sensor-based N Recommendatimentioning

confidence: 99%

Applicability of Ground-based Remote Sensors for Crop N Management in Sub Saharan Africa

Teboh¹,

Tubaña²,

Udeigwe³

et al. 2011

JAS

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Remote sensors have a growing legacy for improving crop N use efficiency (NUE) in several parts of the world. The technology employs crop spectral properties to determine fertilizer rates by matching crop N requirement based on midseason yield potential. Conclusions that the technology is inappropriate for Sub Saharan Africa (SSA) because the farmers use little or no fertilizer, or cannot afford it, are reviewed. Opportunities and applicability using a model concept from the GreenSeeker ® sensor ($4000) are presented. Because farmers in SSA inefficiently apply fertilizer through blanket recommendations, they must improve crop NUE to minimize cost. Application of this technology would enable refinement or development of N recommendation protocols for target groups of farmers based on site and delineated management field zones. With new developments of a prototype GreenSeeker ® , the Optical Pocket Sensor (<$250), this technology will definitely be affordable and applicable, at least for institutional research purposes in SSA.

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How important is plant litter to the regulation of mineral‐N leaching to streams in winter? An observations‐led experimental approach

Cited by 6 publications

References 29 publications

Water quality change of rivers during rainy events in a watershed with different land uses in Southern Brazil

Water quality change of rivers during rainy events in a watershed with different land uses in Southern Brazil

Managing farmed closed depressional areas using blind inlets to minimize phosphorus and nitrogen losses

Applicability of Ground-based Remote Sensors for Crop N Management in Sub Saharan Africa

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