Photosynthetic efficiency, gas exchange and yield of castor bean intercropped with peanut in semiarid Brazil

Dutra, Wellison Filgueiras; Melo, Alberto Soares de; Dutra, Alexson Filgueiras; Brito, Marcos E. B.; Filgueiras, Luanna Maria Beserra; Meneses, Carlos

doi:10.1590/1807-1929/agriambi.v21n2p106-110

Cited by 9 publications

(6 citation statements)

References 10 publications

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“…LAI has been shown to be an effective method by which to evaluate light absorption, and the photosynthetic rate of a crop is directly affected by the LAI 29 , 32 . We found that the LAI of intercropped soybean and maize are lower than that of the corresponding sole crop, indicating that the two species restrained each other in LAI of the competing crop when intercropped 33 . The DIFN was significantly improved under intercrops, showing that intercrop increased light transmission of the canopy and decreased the waste of light energy 34 .…”

Section: Discussionmentioning

confidence: 77%

Effect of sowing proportion on above- and below-ground competition in maize–soybean intercrops

Ren

Zhang

Yan

et al. 2021

Sci Rep

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The relative contribution of above- and below-ground competition to crop yield under intercropping systems is critical to understanding the mechanisms of improved yield. Changes in the content of above- and below-ground biomass, leaf photosynthetic rate (Pn), leaf area index (LAI), chlorophyll meter reading (SPAD), diffuse non interceptance (DIFN), soil water storage (SWS), crop nitrogen (N), and phosphorus (P) uptake were examined in a 2-year trial of different maize–soybean intercropping systems on the Loess Plateau, China. Compared with the sole cropping system, shoot biomass of maize was increased by 54% in M2S2 and 62% in M2S4 strip intercropping treatment. The crop N and P uptake of maize increased significantly, by 54% and 50% in M2S2 and by 63% and 52% in M2S4 compared with their respective sole crop. LAI values of maize in intercropping systems were 14% and 15% for M2S2 and M2S4 less than that in the sole crop. The DIFN of intercropped maize was increased by 41% and 48% for M2S2 and M2S4 compared to monocrop. There were no significant differences in Pn and SWS in both crops between the two cropping systems. The contribution rate of DIFN in M2S2 and crop P uptake in M2S4 on the biological yield in intercropping system was the highest among all factors. We conclude that the sowing proportion affects above- and below-ground competition in maize–soybean intercropping systems.

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Section: Discussionmentioning

confidence: 77%

Effect of sowing proportion on above- and below-ground competition in maize–soybean intercrops

Ren

Zhang

Yan

et al. 2021

Sci Rep

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“…In addition, the correlation of yield with g s and photosynthesis when these values were averaged through the drought period was higher than the correlation between yield and seed Δ 13 C (Figures 2–5). This was surprising because in previous research, the correlation between yield and gas exchange measurements has been reported as weak (Dutra et al., 2017; Zheng et al., 2011). The high correlation observed in our study is likely the result of averaging the abundant and repeated measurements during the drought period.…”

Section: Discussionmentioning

confidence: 83%

“…In our study, seed Δ 13 C showed a stronger positive relationship with yield than shoot biomass (Figures 2 and 3), similar to what has been found in common bean (Polania et al., 2016; Sanz‐Saez et al., 2019). This would indicate that seed Δ 13 C is a better parameter than shoot Δ 13 C to predict yield; however, studies in soybean have demonstrated that shoot and seed Δ 13 C can both be used to predict yield (Dutra et al., 2017; Kaler et al., 2018). The low correlation between shoot Δ 13 C and yield observed in our study (Figures 2 and 3) was likely due to the fact that the samples were taken at harvest and at that point some of the 13 C fixed in the shoot may have already been transported to the reproductive organs (Kvien et al., 1986; Zhou et al., 2016).…”

Section: Discussionmentioning

confidence: 99%

Tolerance to mid‐season drought in peanut can be achieved by high water use efficiency or high efficient use of water

et al. 2022

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Peanut (Arachis Hypogaea L) is an economic cash crop mainly planted in arid and semi-arid regions where drought causes approximately 20% yield losses every year.It has been demonstrated that drought tolerance can be achieved by two different mechanisms in plants: either by saving water or by extracting more water from the soil (water spender genotypes). The objective of this research was to screen for these two mechanisms of drought tolerance in peanut. Plants were grown in rainout shelters under irrigated conditions until mid-pod filling, then drought was induced using rainout shelters. Gas exchange parameters were measured regularly during the drought period and recovery. Genotypes PI 502120 and AU-NPL 17 were classified as water spender genotypes as they showed high yield, Δ 13 C, photosynthesis, and stomatal conductance under drought. This is the first time that water spender genotypes have been identified in peanut. On the other hand, genotypes Line-8 and AU16-28 were classified as water savers as they showed equally high yields but with low Δ 13 C and stomatal conductance and moderate photosynthesis under drought stress. In this study, water spender genotypes did not show a yield advantage in comparison with water savers. INTRODUCTIONPeanut (Arachis Hypogaea L) is an important oilseed and human staple food crop as peanut seed contains 38-56% oil, 28-33% protein, 20% carbohydrates, and enriched vitamins and minerals (Food Data Central, 2019). In the Southeastern United States, peanut is used as a summer rotation crop with cotton to prevent boll weevil development in cotton (Johnson et al., 2001). In 2020, 3 million metric tonnes were produced in the United States on 526,000 ha (USDA, 2020), most of which are planted in Georgia,

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“…It is important emphasize that K is a primary element to several plants' physiological actions, such as cellular turgor control, activation of enzymes involved in respiration, water relations, photosynthesis and adjustment of stomatal opening and closuring [24]. This nutrient also acts on the regulation of stomatal conductance mechanism, which controls the water use efficiency (increasing its efficacy), considering that the use of water molecules becomes more efficient [25]. This is why plants usually use mechanisms of adaptation in order to reduce transpiration, increase carboxylation efficiency and improve its water use [26].…”

Section: Biofertilizermentioning

confidence: 99%

Chlorophyll indexes and gas exchanges of Talisia esculenta seedlings in organic substrates and biofertilizer

Cavalcante

Henrique

et al. 2020

Sci. Plena

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The Talisia esculenta (popularly called Talisia esculenta) is a native plant from Brazil with great socioeconomic importance regarding its extraction cultivation, however only a few scientific studies were carried out with this species, especially concerning its physiological characteristics. The aim of the present study was to evaluate the utilization of different organic substrates and biofertilizers through the soil on the physiological performance of T. esculenta seedlings. The experiment was performed between August and November 2015. The trial design consisted of randomized blocks, with a factorial arrangement 4 x 2 corresponding to four substrates (Test: control group; SE: commercial substrate; RFV: compost of fruit and vegetable remains; RPI: substrate with remains of industrialized food), in both presence and absence of biofertilizer, with five replicates. The analyzed variables were chlorophyll indexes a, b and gas exchanges. The chlorophyll rates a, b and total were higher on SE, RFV and RPI, but no influences of the biofertilizer were detected on the chlorophyll indexes of T. esculenta seedlings. All substrates (SE, RFV and RPI) increased the chlorophyll indexes a, b and total of the seedlings. The substrates increases the chlorophyll a, b and total indices, except for the control substrate independent of the application of biofertilizer. The efficiency of gas exchange increases with the addition of biofertilizer.

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Photosynthetic efficiency, gas exchange and yield of castor bean intercropped with peanut in semiarid Brazil

Cited by 9 publications

References 10 publications

Effect of sowing proportion on above- and below-ground competition in maize–soybean intercrops

Effect of sowing proportion on above- and below-ground competition in maize–soybean intercrops

Tolerance to mid‐season drought in peanut can be achieved by high water use efficiency or high efficient use of water

Chlorophyll indexes and gas exchanges of Talisia esculenta seedlings in organic substrates and biofertilizer

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