The effect of soil moisture on light interception and the 
conversion coefficient for three landraces of bambara 
groundnut (<i>Vigna subterranea</i>)

Collinson, Sarah; Berchie, J. N.; Azam-Ali, S. N.

doi:10.1017/s0021859699006875

Cited by 28 publications

(27 citation statements)

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“…In fact, the RUE achieved the highest amount in D 1 and the lowest in D 4 treatment. These results are consistent with those ofXianshi et al, (1998) and Collinson et al (1999). They found that the deficit irrigation reduces the radiation interception owing to the foliage rolling and they affirmed that the number and size of leaves may be reduced or the total leaf area may decrease with extended deficit.…”

Section: Discussionsupporting

confidence: 92%

Does Deficit Irrigation Affect the Relation between Radiation Interception and Water Consumption for Durum Wheat (Triticum durum Desf)?

Rezig

M’hamed

Naceur

2015

EER

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Total Dray Matter (TDM), Photosynthetically Active Radiation Intercepted (PARabs), Water Consumption (WC), Water use-(WUE), Radiation use efficiency (RUE) and the relationship between Radiation Interception and Water Consumption for Durum Wheat were investigate under different irrigation amount (D 1 = 100 % ETc; D 2 = 70 % ETc; D 3 = 40 % ETc and D 4 = pluvial) and during three growing seasons (2005-2006, 2006-2007 and 2007-2008). Results showed that, the cumulative PAR abs decreased with deficit irrigation. In fact, D 1 treatment recorded the highest cumulative PAR abs and the lowest marked underD 4 treatment. Similarly, TDM and RUE were decreased with deficit irrigation. The highest RUE observed under the D 1 (from 1.32 to 1.43 g MJ -1 ) and the lowest under D 4 (from 1.17 to 1.29 g MJ -1 ). However WUE increased with deficit irrigation. The highest WUE were obtained under the D 4 (from 3 to 4 kg m -3 ) and the lowest were observed under D 1 (from 2.8 to 3.1 kg m -3 ). Significant linear relationship was found between cumulative PAR abs and cumulative water consumption with a high correlation coefficient (R 2 ) only under the two treatments D 1 and D 2 .

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Section: Discussionsupporting

confidence: 92%

Does Deficit Irrigation Affect the Relation between Radiation Interception and Water Consumption for Durum Wheat (Triticum durum Desf)?

Rezig

M’hamed

Naceur

2015

EER

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“…As well, numerous researchers affirmed that under nitrogen shortage the leaf area expansion decreases and senescence increases (Vos & Biemond, 1992;Massignam et al, 2011). Likewise, these results are consistent with those of Collinson et al (1999). These authors reported that the water deficit reduces the solar radiation interception due to rolling up the leaves and they observed that the number and size of leaves may be reduced or the total leaf area may decrease, if the water deficit is prolonged.…”

Section: Discussionsupporting

confidence: 72%

Deficit Irrigation of Durum Wheat (Triticum durum Desf): Effects on Total Dry Matter Production, Light Interception and Radiation Use Efficiency Under Different Nitrogen Rates

M’hamed¹,

Rezig²,

Naceur³

2014

SAR

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On-farm trial was conducted from 2005 to 2008 to test the hypothesis that reduction of total dry matter (TDM) in crops can occur after a decreased radiation use efficiency (RUE) due to shortage of nitrogen and irrigation, we applied three irrigations treatments (D1, D2 and D3) and four nitrogen rates (N1, N2, N3 and N4). Photosynthetic active radiation absorbed or cumulative light interception (PARabs) and RUE of Durum wheat were measured. Results showed that D1N1 treatment recorded the highest LAI, PARabs, TDM and RUE. The maximum LAI was obtained 140 DAS (days after sowing) under treatment D1N2 (6.42) and the lowest LAI at the same phase belonged to treatment D2N4 (3.86). At the harvest, the maximum of TDM was 1487 g m -2 recorded under treatment D1N1. The minimum value obtained was 930 g m -2 under treatment D3N4. Also, PARabs was improved under D1N1 and D1N2 treatments. With reduced N application rates and irrigation doses, PARabs was decreased and the lowest values were observed under D3N4 condition. The RUE, varied from 1.55 g MJ -1 (D1N1) to 1.24 g MJ -1 (D3N4), was affected and decreased under deficit irrigation and low nitrogen conditions. In conclusion, the results of this study seem to show that D1N1 and D1N2 treatments can be beneficial for Durum wheat under field conditions in semi arid zone of Tunisia, for the purpose of improving RUE and maximizing grain yield.

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“…In addition to weather conditions, a natural reduction of incoming solar radiation is expected to happen after the middle of the summer season, as a consequence of the solar declination. Decreases in intercepted PPFD may also be expected in maize crops during the grain-filling period due to leaf senescence (Maddoni & Otegui, 1996;Collinson et al, 1999;Lindquist et al, 2005).…”

Section: Resultsmentioning

confidence: 99%

“…If the water deficit is prolonged, the number and size of leaves may be reduced. Consequently, the total leaf area may also decrease, thus reducing the interception of solar radiation (Collinson et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Intercepted solar radiation by maize crops subjected to different tillage systems and water availability levels

Bergamaschi

Dalmago

Bergonci

et al. 2010

Pesq. agropec. bras.

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-The objective of this work was to evaluate changes in the photosynthetic photon flux density (PPFD) interception efficiency and PPFD extinction coefficient for maize crop subjected to different soil tillage systems and water availability levels. Crops were subjected to no-tillage and conventional tillage systems combined with full irrigation and non-irrigation treatments. Continuous measurements of transmitted PPFD on the soil surface and incoming PPFD over the canopy were taken throughout the crop cycle. Leaf area index and soil water potential were also measured during the whole period. Considering a mean value over the maize cycle, intercepted PPFD was higher in the conventional tillage than in the no-tillage system. During the initial stages of plants, intercepted PPFD in the conventional tillage was double the PPFD interception in the no-tillage treatment. However, those differences were reduced up to the maximum leaf area index, close to tasseling stage. The lowest interception of PPFD occurred in the conventional tillage during the reproductive period, as leaf senescence progressed. Over the entire crop cycle, the interception of PPFD by the non-irrigated plants was about 20% lower than by the irrigated plants. The no-tillage system reduced the extinction coefficient for PPFD, which may have allowed a higher penetration of solar radiation into the canopy.Index terms: Zea mays, leaf area, no-tillage, photosynthetic photon flux density, water deficit. Radiação solar interceptada pela cultura do milho sob diferentes níveis de preparo do solo e disponibilidade hídricaResumo -O objetivo deste trabalho foi avaliar a eficiência da interceptação da radiação fotossinteticamente ativa (RFA) e o coeficiente de extinção da cultura do milho em diferentes sistemas de preparo do solo e níveis de disponibilidade hídrica. O milho foi cultivado em sistemas de plantio direto e preparo convencional combinados a tratamentos de irrigação completa e sem irrigação. Medições contínuas de RFA transmitida à superfície do solo e RFA incidente sobre o dossel foram tomadas ao longo do ciclo da cultura. O índice de área foliar (IAF) e o potencial da água no solo também foram medidos em todo o período. Na média de todo o ciclo da cultura, a RFA interceptada foi maior em preparo convencional do que em plantio direto. Nos estádios iniciais das plantas, a RFA interceptada em preparo convencional foi o dobro daquela em plantio direto. Porém, essas diferenças reduziram-se até o máximo IAF, próximo ao pendoamento. A menor interceptação de RFA pela cultura ocorreu em preparo convencional durante o período reprodutivo, à medida que a senescência foliar progrediu. No ciclo todo, a interceptação de RFA pela cultura não irrigada foi 20% menor que na irrigada. O sistema plantio direto reduziu o coeficiente de extinção de RFA pelo milho, e proporcionou maior penetração de radiação solar no dossel.Termos para indexação: Zea mays, área foliar, plantio direto, radiação fotossinteticamente ativa, deficit hídrico.

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The effect of soil moisture on light interception and the conversion coefficient for three landraces of bambara groundnut (Vigna subterranea)

Cited by 28 publications

References 0 publications

Does Deficit Irrigation Affect the Relation between Radiation Interception and Water Consumption for Durum Wheat (Triticum durum Desf)?

Does Deficit Irrigation Affect the Relation between Radiation Interception and Water Consumption for Durum Wheat (Triticum durum Desf)?

Deficit Irrigation of Durum Wheat (Triticum durum Desf): Effects on Total Dry Matter Production, Light Interception and Radiation Use Efficiency Under Different Nitrogen Rates

Intercepted solar radiation by maize crops subjected to different tillage systems and water availability levels

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