A simple method to estimate radiation interception by nursery stock conifers: a case study of eastern white cedar

Pronk, A.A.; Goudriaan, J.; Stilma, E.S.C.; Challa, H.

doi:10.1016/s1573-5214(03)80020-9

Cited by 28 publications

(32 citation statements)

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“…A model for the daily light interception per each species in a strip intercrop was developed on the basis of a model for light interception in a block structured canopy by Pronk et al (2003).…”

Section: Calculation Of Light Interceptionmentioning

confidence: 99%

“…We describe here in detail how the equations for the light interception in the strip intercrop are derived from elementary geometric principles and reasoning, originally developed by Goudriaan (1977) and Pronk et al (2003), and later used with minor modifications by Zhang et al (2008), Mao et al (2014) and Wang et al (2015). A strip-planted crop is a sole crop with some rows omitted to create empty paths (strip width: R, and path width: P) (Fig.…”

Section: Fraction Of Light Interception For a Strip-planted Sole Cropmentioning

confidence: 99%

“…Thus the fraction of light interception by a strip-planted canopy (f strip_crop ) is bracketed between two extremes: interception by a sole crop with the same LAI as a maximum (homogeneous LAI), and interception by a compressed strip crop with the same overall LAI as a minimum. Goudriaan (1977) and Pronk et al (2003) proposed to calculate the radiation interception in a strip planted crop as a weighted average of these two extremes: radiation interception f compr by a fully compressed canopy (with weight w) and radiation interception f homo by a homogenous canopy (with weight 1 -w), Eq. 3.1 (Pronk et al, 2003):…”

Section: Fraction Of Light Interception For a Strip-planted Sole Cropmentioning

confidence: 99%

“…Goudriaan (1977) and Pronk et al (2003) proposed to calculate the radiation interception in a strip planted crop as a weighted average of these two extremes: radiation interception f compr by a fully compressed canopy (with weight w) and radiation interception f homo by a homogenous canopy (with weight 1 -w), Eq. 3.1 (Pronk et al, 2003):…”

Section: Fraction Of Light Interception For a Strip-planted Sole Cropmentioning

confidence: 99%

“…3.7). Both SP and .5 provides a useful weight function for all intermediate situations (Pronk et al, 2003).…”

Section: Fraction Of Light Interception For a Strip-planted Sole Cropmentioning

confidence: 99%

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On yield gains and yield gaps in wheat-maize intercropping : opportunities for sustainable increases in grain production

Gou¹

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Intercropping is the cultivation of two or more crop species simultaneously in the same field, while relay intercropping means that the growing periods of the crop species are only partially overlapping. Intercropping has advantages with respect to productivity, resource capture, build-up of soil organic matter, and pest and disease suppression. This thesis aims to quantify and explain the yield advantages in wheat-maize relay intercropping and to assess the importance of intercropping for food production and land use efficiency.Wheat-maize intercropping had land equivalent ratios around or above one in two experiments in the Netherlands. Wheat in border rows showed major yield increases, and this yield increase was due to increases in the number of tillers per plant and the number of kernels per ear. The yield advantage of intercropped wheat was associated with a high radiation interception and radiation use efficiency (RUE). Under Dutch growing conditions, maize performance in the intercrop was constrained. Intercropping had a negative effect on the yield per plant and radiation use efficiency of maize. A strip intercrop model was developed, parameterized and tested with data on wheat-maize intercropping in the Netherlands. The model simulates radiation interception and growth in relay-strip intercrops with two species in different planting configurations. The model also allows simulating the consequences of border row effects for total system productivity. Bayesian analysis was applied to calibrate radiation use efficiency of wheat and maize in sole crops and intercrop.Intercropped wheat had higher a RUE than sole wheat, while intercropped maize had a lower RUE than sole maize. Intercropped maize had less favourable leaf traits (e.g. nitrogen content) during the flowering stage than sole maize in 2014, but the leaves in the intercrop had a higher photosynthetic rate than those in the sole crop. Possible explanations for this finding include differences between sole and mixed crops in water acquisition from soil, light distribution in the canopy, nitrogen distribution within the leaf and the contribution of the ear leaf to the growth of the cob. The low radiation use efficiency in intercropped maize may relate to nitrogen deficiency during grain filling. New concepts for potential yield, yield gain and yield gap in intercropping were developed in this thesis. Using crop model simulations and farm survey data, those concepts were operationalized in the context of wheat and maize production in an oasis area (Zhangye city) in northwest China. Wheat-maize intercropping resulted in substantial yield gains under potential and actual growing conditions. A comparison of potential and actual yields indicated a yield gap of 33% for sole wheat, 49% for sole maize, 15% for intercropped wheat, and 51% for intercropped maize. The land use analysis showed that discontinuing the use of intercropping in this region will decrease grain production substantially.Overall, this thesis studied the growth and productivity of ...

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Section: Calculation Of Light Interceptionmentioning

confidence: 99%

Section: Fraction Of Light Interception For a Strip-planted Sole Cropmentioning

confidence: 99%

Section: Fraction Of Light Interception For a Strip-planted Sole Cropmentioning

confidence: 99%

Section: Fraction Of Light Interception For a Strip-planted Sole Cropmentioning

confidence: 99%

“…3.7). Both SP and .5 provides a useful weight function for all intermediate situations (Pronk et al, 2003).…”

Section: Fraction Of Light Interception For a Strip-planted Sole Cropmentioning

confidence: 99%

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On yield gains and yield gaps in wheat-maize intercropping : opportunities for sustainable increases in grain production

Gou¹

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The effect of strip orientation and width on radiation interception in maize–soybean strip intercropping systems

Liu

Chen

et al. 2022

Food and Energy Security

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Maize–soybean intercropping systems are widely used in developing countries, but few studies have been performed to optimize such systems. The effects of strip width and orientation on photosynthetically active radiation (PAR) distribution characteristics were therefore determined to gain a better understanding of crop productivity in maize–soybean intercropping systems. A series of intercropping experiments incorporating different strip orientations and widths were conducted. In addition, an improved radiation transmission model was used to simulate PAR interception by the maize and soybean crops. We found that more PAR was intercepted by the soybean plants than by the maize plants when the strip orientation angle increased from 0° to 90° in the maize–soybean intercropping systems. This result was obtained in most of the main maize production areas, including those with different latitudes. The effect of strip widths within the intercropping systems also had a significant effect on PAR interception. The relative fraction of PAR intercepted ranged from 39.4% to 86% for soybean and 105.8% to 169.3% for maize. The effect of soybean strip width on leaf PAR interception was greater than that of maize strip width. These results are not only of fundamental biological importance but they also have important implications for agriculture in terms of the optimization of production in intercropping systems.

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Dry mass production and water use of non- and drip irrigated shape Thuja occidentalis ‘Brabant’: Field experiments and modeling

2005

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Generally, irrigation increases dry mass production (DM) on sandy soils of horticultural crops and at the same time increases the risk of percolation losses of water and chemicals to below the root zone. However, the effects of irrigation are highly site-specific and not easily determined, which hampers the development of proper management tools and guidelines. A two-dimensional soil-water balance model combined with a crop growth model was parameterized and validated, and used to investigate DM and water use of Thuja occidentalis 'Brabant' in a field trial under non-and drip irrigated conditions. Measured leaf DM and leaf area index (LAI) were not affected by irrigation but irrigation increased stem DM and the specific leaf area. Simulated DM and LAI were in good agreement with the measurements. Simulated pressure head followed the measured pressure head, although model's performance was better under dry than under wet conditions. Simulation experiments indicated that increasing irrigation threshold levels increased DM production and leaching relatively to no irrigation, when the irrigation threshold level was measured at 0.25 m depth.

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A simple method to estimate radiation interception by nursery stock conifers: a case study of eastern white cedar

Cited by 28 publications

References 10 publications

On yield gains and yield gaps in wheat-maize intercropping : opportunities for sustainable increases in grain production

On yield gains and yield gaps in wheat-maize intercropping : opportunities for sustainable increases in grain production

The effect of strip orientation and width on radiation interception in maize–soybean strip intercropping systems

Dry mass production and water use of non- and drip irrigated shape Thuja occidentalis ‘Brabant’: Field experiments and modeling

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