Effects of low light intensity on radiation use efficiency and productivity of tropical pulses

Pulses have distinct morpho-physiological response under reduced sunlight. But little is known for their capacity to adapt to the level of shading encountered in crop mixtures. Field experiment was conducted to evaluate the pulses under artificial shade during rainy season at Raichur, Karnataka. Objectives were to select potential pulse crop tolerant to shade based on productivity and radiation use efficiency (RUE). Experiment was laid out in split-plot design, wherein light intensity (unshade, 50 and 75% shade) in main plots and pigeon-pea, cowpea, lablab and black-gram were in sub plots. Shade levels were created by the erection of white shade nets at 25 DAS continued upto harvest. Results indicated that irrespective of the crop more pods, grain, stover and protein yield were recorded under unshade. While, pigeon-pea and lablab were produced significantly higher yield under unshade, however, these were also well performed under 50 per cent shade over black-gram and cowpea. However, seeds crude protein was higher in shaded plants compared to unshaded. Significantly higher RUE (2.22 gMJ-1) was recorded in pigeon-pea under 75 per cent shade and lowest in unshaded lablab (0.35 gMJ-1) and black-gram (0.40 g MJ-1). Results inferred that pigeon-pea and lablab were found tolerant to shade compared to cowpea and black-gram and may be suitable for crop mixtures cultivation.

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Growth, Light Interception and Radiation use Efficiency Response of Pigeon pea (Cajanus cajan) to Planting Density in Southern Ethiopia

Journal of Agronomy ◽

10.3923/ja.2012.85.93 ◽

2012 ◽

Vol 11 (4) ◽

pp. 85-93 ◽

Cited By ~ 9

Author(s):

Walelign Worku ◽

Walelign Demisie

Keyword(s):

Cajanus Cajan ◽

Pigeon Pea ◽

Light Interception ◽

Radiation Use Efficiency ◽

Planting Density ◽

Southern Ethiopia ◽

Use Efficiency ◽

Radiation Use

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Solar radiation use efficiency of pigeon pea (Cajanus cajan L.) in relation to crop geometry and varieties

Legume Research - An International Journal ◽

10.18805/lr-4032 ◽

2018 ◽

Author(s):

Kuljit Kaur ◽

K.S. Saini

Keyword(s):

Yield Components ◽

Canopy Temperature ◽

Pigeon Pea ◽

Radiation Use Efficiency ◽

Use Efficiency ◽

Per Capita ◽

Research Experiment ◽

Radiation Use ◽

Crop Geometry ◽

Better Than

Pulses are integral part of Indians diet so there is significant need to improve the productivity of pulses for their per capita availability. A research experiment was conducted in kharif 2015, at student research farm, Punjab Agricultural University, Ludhiana, Punjab to assess the radiation utilization and productivity of pigeon pea with respect to different row spacings and varieties. It was found that 60 x 21cm gave significant results in photosynthetically active radiation interception (PARI), canopy temperature, yield and yield components which were due to efficient GDD than other crop geometries. Similarly, determinate variety AL 15 performed significantly better than indeterminate variety PAU 881 in yield contributing components, yield and radiation use efficiency.

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Effects of Diffuse Light on Radiation Use Efficiency of Two Anthurium Cultivars Depend on the Response of Stomatal Conductance to Dynamic Light Intensity

Frontiers in Plant Science ◽

10.3389/fpls.2016.00056 ◽

2016 ◽

Vol 7 ◽

Cited By ~ 5

Author(s):

Tao Li ◽

Johannes Kromdijk ◽

Ep Heuvelink ◽

F. R. van Noort ◽

Elias Kaiser ◽

...

Keyword(s):

Stomatal Conductance ◽

Light Intensity ◽

Radiation Use Efficiency ◽

Diffuse Light ◽

Use Efficiency ◽

Radiation Use

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Efficiency on the Use of Radiation and Corn Yield under Three Densities of Sowing

International Journal of Agronomy ◽

10.1155/2016/6959708 ◽

2016 ◽

Vol 2016 ◽

pp. 1-5 ◽

Cited By ~ 4

Author(s):

A. Morales-Ruiz ◽

J. M. Loeza-Corte ◽

E. Díaz-López ◽

E. J. Morales-Rosales ◽

O. Franco-Mora ◽

...

Keyword(s):

Attenuation Coefficient ◽

Biomass Production ◽

Harvest Index ◽

Climatic Conditions ◽

Radiation Use Efficiency ◽

Corn Yield ◽

Open Pollination ◽

Use Efficiency ◽

Radiation Use ◽

Plot Design

Aiming to evaluate sowing densities and efficiency of radiation use, six corn genotypes, three from open pollination (“Amarillo Almoloya,” “Cacahuacintle,” and “Jiquipilco”) and three hybrids (“Z-60,” “Condor,” and “H-50”), were sown at densities of 6.9, 7.8, and 8.9 plants m−2, under a split plot design, within a factorial arrangement of treatments during three years (2008, 2009, and 2010). Evaluated variables were yield, harvest index, biomass production, attenuation coefficient, and radiation use efficiency. Results indicate that 2008 was the best year because yield, biomass, and radiation use efficiency were 1132.6, 3505 gm−2, and 0.79 g MJ−1, respectively. “Jiquipilco” was the genotype that exhibited the best adaptability to climatic conditions of the zone; thus, it is recommended to be grown on the studied zone.

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RADIATION USE EFFICIENCY, ABOVE GROUND BIOMASS ACCUMULATION, CANOPY DEVELOPMENT, LEAF AREA-LIGHT INTERCEPTION PROFILES AND RADIATION INTERCEPTION OF SUNFLOWER (Helianthus annuus L.) AS INFLUENCED BY IRRIGATION REGIMEN / INFLUENCIA DEL RÉGIMEN DE IRRIGACIÓN SOBRE LA EFICACIA DEL USO DE LA RADIACIÓN, LA ACUMULACIÓN DE BIOMASA, EL DESAROROLLO DEL CANOPEO, EL ÁREA DE LA HOJA Y LOS PERFILES DE INTERCEPCIÓN DE LUZ Y DE RADIACIÓN EN GIRASOL (Helianthus annuus L.) / EFFICACITÉ DE L’UTILISATION DES RADIATIONS SOLAIRES, ACCUMULATION DE LA BIOMASSE DANS LA PARTIE AÉRIENNE, DÉVELOPPEMENT DE L’OMBRELLE, PROFILS D’INTERCEPTION DE LA LUMIÈRE PAR LA FEUILLE ET INTERCEPTION DES RADIATIONS SOLAIRES CHEZ LE TOURNESOL (Helianthus annuus L.) SOUS L’INFLUENCE D’UN RÉGIME D’IRRIGATION

Helia ◽

10.1515/helia.2001.24.35.101 ◽

2001 ◽

Vol 24 (35) ◽

pp. 101-110 ◽

Cited By ~ 1

Author(s):

S. Sridhara ◽

T.G. Prasad

Keyword(s):

Helianthus Annuus ◽

Biomass Accumulation ◽

Light Interception ◽

Radiation Use Efficiency ◽

Leaf Nitrogen Content ◽

Radiation Interception ◽

Canopy Development ◽

Helianthus Annuus L ◽

Use Efficiency ◽

Radiation Use

SUMMARYA field experiment was conducted at Gandhi Krishi Vignana Kendra, University of Agricultural Sciences, Bangalore to study the effect of irrigation regimens on the biomass accumulation, canopy development, light interception and radiation use efficiency of sunflower. The treatments includes irrigating the plants at 0.4, 0.6, 0.8 and 1.0 cumulative pan evaporation. The results indicated that the aboveground biomass, canopy development, radiation interception and radiation use efficiency were influenced favorably by the irrigation regimens. Irrespective of the irrigation regimen, the radiation use efficiency of sunflower increased from 15 DAS to 75 DAS and then tended to decline. The decrease in RUE after anthesis is coupled with decrease in leaf nitrogen content. In general the RUE of sunflower ranged from 0.49 g MJ-1 to 1.84 g MJ-1 at different growth stages. The light transmission within the canopy increased exponentially with plant height and the canopy extension coefficient is found to be 0.8.

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Intercepted Photosynthetically Active Radiation (PAR) and Spatial and Temporal Distribution of Transmitted PAR under High-Density and Super High-Density Olive Orchards

Agriculture ◽

10.3390/agriculture11040351 ◽

2021 ◽

Vol 11 (4) ◽

pp. 351

Author(s):

Adolfo Rosati ◽

Damiano Marchionni ◽

Dario Mantovani ◽

Luigi Ponti ◽

Franco Famiani

Keyword(s):

Spatial Variability ◽

Photosynthetically Active Radiation ◽

Temporal Distribution ◽

High Density ◽

Radiation Use Efficiency ◽

Spatial And Temporal Distribution ◽

Active Radiation ◽

Use Efficiency ◽

And Performance ◽

Radiation Use

We quantified the photosynthetically active radiation (PAR) interception in a high-density (HD) and a super high-density (SHD) or hedgerow olive system, by measuring the PAR transmitted under the canopy along transects at increasing distance from the tree rows. Transmitted PAR was measured every minute, then cumulated over the day and the season. The frequencies of the different PAR levels occurring during the day were calculated. SHD intercepted significantly but slightly less overall PAR than HD (0.57 ± 0.002 vs. 0.62 ± 0.03 of the PAR incident above the canopy) but had a much greater spatial variability of transmitted PAR (0.21 under the tree row, up to 0.59 in the alley center), compared to HD (range: 0.34–0.43). This corresponded to greater variability in the frequencies of daily PAR values, with the more shaded positions receiving greater frequencies of low PAR values. The much lower PAR level under the tree row in SHD, compared to any position in HD, implies greater self-shading in lower-canopy layers, despite similar overall interception. Therefore, knowing overall PAR interception does not allow an understanding of differences in PAR distribution on the ground and within the canopy and their possible effects on canopy radiation use efficiency (RUE) and performance, between different architectural systems.

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Relationships among light distribution, radiation use efficiency and land equivalent ratio in maize-soybean strip intercropping

Field Crops Research ◽

10.1016/j.fcr.2018.05.010 ◽

2018 ◽

Vol 224 ◽

pp. 91-101 ◽

Cited By ~ 36

Author(s):

Xin Liu ◽

Tanzeelur Rahman ◽

Chun Song ◽

Feng Yang ◽

Benying Su ◽

...

Keyword(s):

Light Distribution ◽

Radiation Use Efficiency ◽

Land Equivalent Ratio ◽

Equivalent Ratio ◽

Use Efficiency ◽

Strip Intercropping ◽

Radiation Use

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SEED-ORIENTED PLANTING IMPROVES LIGHT INTERCEPTION, RADIATION USE EFFICIENCY AND GRAIN YIELD OF MAIZE (Zea mays L.)

Experimental Agriculture ◽

10.1017/s0014479716000326 ◽

2016 ◽

Vol 53 (2) ◽

pp. 210-225 ◽

Cited By ~ 5

Author(s):

GUILHERME M. TORRES ◽

ADRIAN KOLLER ◽

RANDY TAYLOR ◽

WILLIAM R. RAUN

Keyword(s):

Grain Yield ◽

Canopy Structure ◽

Maize Yield ◽

Light Interception ◽

Plant Population ◽

Radiation Use Efficiency ◽

Seed Placement ◽

Use Efficiency ◽

The Difference ◽

Radiation Use

SUMMARYSeed-oriented planting provides a manner to influence canopy structure. The purpose of this research was to improve maize light interception using seed-oriented planting to manipulate leaf azimuth across the row thereby minimizing leaf overlap. To achieve leaf azimuths oriented preferentially across the row, seeds were planted: (i) upright with caryopsis pointed down, parallel to the row (upright); and (ii) laying flat, embryo up, perpendicular to the row (flat). These treatments were compared to conventionally planted seeds with resulting random leaf azimuth distribution. Seed orientation effects were contrasted with three levels of plant population and two levels of hybrid specific canopy structures. Increased plant population resulted in greater light interception but yield tended to decrease as plant population increased. The planophile hybrid produced consistently greater yields than the erectophile hybrid. The difference between planophile and erectophile hybrids ranged from 283 to 903 kg ha−1. Overall, mean grain yield for upright and flat seed placement increased by 351 and 463 kg ha−1 compared to random seed placement. Greater cumulative intercepted photosynthetically active radiation (CIPAR) was found for oriented seeds rather than random-oriented seeds. At physiological maturity upright, flat and random-oriented seeds intercepted 555, 525 and 521 MJ m−2 of PAR, respectively. Maize yield responded positively to improved light interception and better radiation use efficiency. Under irrigated conditions, precision planting of maize increased yield by 9 to 14% compared to random-oriented seeds.

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