Evidence of improved water uptake from subsoil by spring wheat following lucerne in a temperate humid climate

Gaiser, Thomas; Perkons, Ute; Küpper, Paul Martin; Uteau, Daniel; Peth, Stephan; Kautz, Timo; Pfeifer, Johannes; Ewert, Frank; Horn, Rainer; Köpke, Ulrich

doi:10.1016/j.fcr.2011.09.019

Cited by 78 publications

(46 citation statements)

References 24 publications

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“…Climate is characterized by temperate humid conditions with maritime influence. Long-term average precipitation is 625 mm; average temperature is 9.6 • C. The soil is classified as alkaline, nutrient-rich Haplic Luvisol that developed from Loess [25,26].…”

Section: Study Site and Field Experimentsmentioning

confidence: 99%

“…We assume that water stress did not occur at any time, given the amount of precipitation that fell over the course of the growing season. We furthermore calculated soil moisture retention from data of a physical soil properties analysis [25] and concluded that soil-moisture tension did not exceed pF values of 3 in 30 cm soil depth until flowering, and at no point in time in 60 cm and 90 cm soil depth (soil moisture measured with EC-5 sensors (Decagon Devices Inc., Pullman, WA, USA) installed in-between the two mid-rows of the unsampled plots, data not shown). Additionally, we did not observe leaf rolling, which is one of the main plant reactions to water stress.…”

Section: Fapar Calculation Assumptionsmentioning

confidence: 99%

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Towards Remote Estimation of Radiation Use Efficiency in Maize Using UAV-Based Low-Cost Camera Imagery

Tewes

Schellberg

2018

Agronomy

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Radiation Use Efficiency (RUE) defines the productivity with which absorbed photosynthetically active radiation (APAR) is converted to plant biomass. Readily used in crop growth models to predict dry matter accumulation, RUE is commonly determined by elaborate static sensor measurements in the field. Different definitions are used, based on total absorbed PAR (RUE total ) or PAR absorbed by the photosynthetically active leaf tissue only (RUE green ). Previous studies have shown that the fraction of PAR absorbed (fAPAR), which supports the assessment of RUE, can be reliably estimated via remote sensing (RS), but unfortunately at spatial resolutions too coarse for experimental agriculture. UAV-based RS offers the possibility to cover plant reflectance at very high spatial and temporal resolution, possibly covering several experimental plots in little time. We investigated if (a) UAV-based low-cost camera imagery allowed estimating RUEs in different experimental plots where maize was cultivated in the growing season of 2016, (b) those values were different from the ones previously reported in literature and (c) there was a difference between RUE total and RUE green . We determined fractional cover and canopy reflectance based on the RS imagery. Our study found that RUE total ranges between 4.05 and 4.59, and RUE green between 4.11 and 4.65. These values are higher than those published in other research articles, but not outside the range of plausibility. The difference between RUE total and RUE green was minimal, possibly due to prolonged canopy greenness induced by the stay-green trait of the cultivar grown. The procedure presented here makes time-consuming APAR measurements for determining RUE especially in large experiments superfluous.

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Section: Study Site and Field Experimentsmentioning

confidence: 99%

Section: Fapar Calculation Assumptionsmentioning

confidence: 99%

Towards Remote Estimation of Radiation Use Efficiency in Maize Using UAV-Based Low-Cost Camera Imagery

Tewes

Schellberg

2018

Agronomy

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“…The impact of biotic factors on root systems includes insect pests, diseases, nematodes, weeds, and competition due to high planting densities. Deep rooting is particularly beneficial for allowing water uptake from great soil depths during the drought times (Gaiser et al, 2012). The crop response to water system strategies was different (Lu et al, 2001), and the effect of irrigation on the plant root systems is also different from one irrigation system to another because of differences in soil water regimes.…”

Section: Introductionmentioning

confidence: 99%

Effect of different irrigation systems on root growth of maize and cowpea plants in sandy soil

Mahgoub

Ibrahim

Ali

2017

Eurasian Journal of Soil Science (Ejss)

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Article Info Received : 28.11.2016 Accepted : 06.06.2017 A field experiment was conducted at the Experimental Farm, Faculty of Agriculture, Suez Canal University to study the influence of different irrigation systems on root length density and specific root length of maize and cowpea plants cultivated in sandy soil. Three irrigation systems (Surface, drip and sprinkler irrigation) were used in this study. The NPK fertilizers were applied as recommended doses for maize and cowpea. Root samples were collected from the soil profile below one plant (maize and cowpea) which was irrigated by the three irrigation systems by using an iron box (30 cm × 20 cm) which is divided into 24 small boxes each box is (5 × 5 × 5 cm). At surface irrigation, root length density of cowpea reached to soil depth 30-40cm with lateral distances 5-10 cm and 15-20 cm. Vertical distribution of root length density of maize was increased with soil depth till 20-25 cm, and then it decreased till soil depth 35-40cm. Under drip irrigation, root length density of cowpea increased horizontally from 0-5cm to 10-15cm then it decreased till soil depth 25-30 cm and below this depth root length density disappeared. For the root length density and specific root length of maize under drip irrigation, the data showed that root length density and specific root length decreased with increasing in soil depth. The root length density of cowpea under sprinkler irrigation at 0-5cm disappeared from horizontal distance at 25-30 cm. The data showed that root length density of maize under sprinkler irrigation was higher at the soil top layers 0-5 cm and 5-10 cm than other layers from 10-40 cm.

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“…During a dry spell in the 2010 season, significantly higher water extraction by the succeeding spring wheat was determined for the 90-105 cm soil depth after two years lucerne compared with two and three years of chicory and one year fescue precrop treatments (Gaiser et al, 2012). Higher biopore density after deep rooting lucerne enabled roots of spring wheat to explore the deeper soil layer more extensively.…”

Section: Advantages Of Bioporesmentioning

confidence: 87%

Optimising Cropping Techniques for Nutrient and Environmental Management in Organic Agriculture

Köpke¹,

Athmann²,

Han³

et al. 2015

SAR

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Depth and architecture of root systems play a prominent role in crop productivity under conditions of low water and nutrient availability. The subsoil contains high amounts of nutrients that may potentially serve for nutrient uptake by crops including finite resources such as phosphorus that have to be used in moderation to delay their exhaustion. Biopores are tubular shaped continuous soil pores formed by plant roots and earthworms. Taproot systems especially those of perennial legumes can make soil nutrients plant available from the solid phase and increase the density of vertical biopores in the subsoil thus making subsoil layers more accessible for succeeding crops. Density of larger sized biopores is further enhanced by increased abundance and activity of anecic earthworms resulting from soil rest and amount of provided feed. Nutrient rich drilospheres can provide a favorable environment for roots and nutrient uptake of subsequent crops. Future efficient nutrient management and crop rotation design in organic agriculture should entail these strategies of soil fertility building and biopore services in subsoil layers site specifically. Elements of these concepts are suggested to be used also in mainstream agriculture headlands, e.g. as 'Ecological Focus Areas', in order to improve soil structure as well as to establish a web of biodiversity while avoiding constraints for agricultural production.

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Evidence of improved water uptake from subsoil by spring wheat following lucerne in a temperate humid climate

Cited by 78 publications

References 24 publications

Towards Remote Estimation of Radiation Use Efficiency in Maize Using UAV-Based Low-Cost Camera Imagery

Towards Remote Estimation of Radiation Use Efficiency in Maize Using UAV-Based Low-Cost Camera Imagery

Effect of different irrigation systems on root growth of maize and cowpea plants in sandy soil

Optimising Cropping Techniques for Nutrient and Environmental Management in Organic Agriculture

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