The effect of light intensity on the growth, development and yield of soybean in Southwest Nigeria

Odeleye, F. O.; Togun, A. O.; Tayo, T. O.

doi:10.4314/acsj.v9i3.27603

Cited by 9 publications

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“…Sunlight influences crop growth and development; by the process of photosynthesis, crops utilise light to change water and CO 2 into sugar, and chlorophyll content (photosynthetic pigments) plays a vital role in converting the light energy to chemical energy (Feng et al, ; Liang, ; Yao, Wang, & Kong, ). Previous studies have shown that chlorophyll content is greatly affected by light conditions and decreases under shading conditions (Odeleye, Togun, & Tayo, ; Su et al, ; Sun & Weng, ). However, in our experiment, optimum leaf excision (T 2 ) increased the chlorophyll content of maize leaves under SM and MS R .…”

Section: Discussionmentioning

confidence: 97%

Optimum leaf excision increases the biomass accumulation and seed yield of maize plants under different planting patterns

Raza

Ling

Khalid

et al. 2019

Annals of Applied Biology

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Without developing new agronomic practices, present rates of improvement in seed yields of cereal crops globally are insufficient to fulfil the estimated increasing food demand for 2050 and beyond. Intercropping is one of the agricultural practices that can lead to greater crop yields. However, there exists leaf redundancy for maize in intercropping systems, and the top canopy leaves shade more competent leaves at middle strata of maize plants. Therefore, this work aimed to elucidate the effect of leaf excision treatments in maize to understand the optimum leaf area of maize plants under a maize-soybean relay-intercropping system (MS R ) and a sole cropping system (SM). The effects of four-leaf excision treatments (T 1 , 0; T 2 , 2; T 3 , 4; T 4 , 6 leaves excised from the top of maize plants until 7 days after silking) on light interception, leaf area index (LAI), photosynthetic characteristics, total biomass accumulation at blistering stage (BS), dough stage (DS) and physiological maturity (PM), and seed yield of maize were investigated through field experiments for 2 years under MS R and SM. Results showed that, under MS R and SM, as compared to control (T 1 ), optimum excision of leaves (T 2 ) from the top of maize plants significantly improved the light interception (by 25, 18 and 16% at BS, DS and PM, respectively) to lower strata leaves and accelerated the biomass partitioning to maize seeds (by 13 and 12% at DS and PM, respectively). Importantly, plants under T 2 exhibited higher green leaf area than control, that is, excision the top two leaves led to an increase in LAI at PM by 10%, suggesting that leaf senescence under T 2 was delayed which enhanced the photosynthetic rate at PM by 7% in 2017 and 6% in 2018. Relative to T 1 , maize under T 2 produced 19 and 13% higher maize yield under MS R and SM, respectively, and relaycropped maize had 90% of SM seed yield. These results suggest that by manipulating the canopy structure of maize plants we can enhance the biomass accumulation and seed yield of maize crops under MS R and SM. K E Y W O R D Sbiomass, leaf excision, light interception, relay-intercropping, seed yield Muhammad A. Raza and Ling Y. Feng are co-first authors.

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Section: Discussionmentioning

confidence: 97%

Optimum leaf excision increases the biomass accumulation and seed yield of maize plants under different planting patterns

Raza

Ling

Khalid

et al. 2019

Annals of Applied Biology

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“…Under shading conditions, the investigation of chlorophyll content helps as an index for light absorption (Fan et al, 2018). Previously, it has been reported that chlorophyll content is greatly affected by light environment (Feng et al, 2018; Khalid et al, 2019; Odeleye, Togun & Tayo, 2001; Sun & Weng, 2010). In our experiment, leaf excising treatments significantly improved the SPAD values of soybean leaves in MS R .…”

Section: Discussionmentioning

confidence: 99%

Growth and development of soybean under changing light environments in relay intercropping system

Raza

Ling

Iqbal

et al. 2019

PeerJ

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Background Maize-soybean relay-intercropping (MSR) is a famous system of crop production in developing countries. However, maize shading under this system directly affects the light quality and intensity of soybean canopy. This is a challenging scenario in which to implement the MSR system, in terms of varieties selection, planting pattern, and crop management since the duration of crop resource utilization clearly differs. Methods Therefore, this experiment aimed to elucidate the effect of leaf excising treatments from maize top to fully clarify the needs and balance of light quality and intensity of intercrop-soybean under MSR in field conditions. The effects of different leaf excising treatments (T0, no removal of leaves; T2, removal of two topmost leaves; T4, removal of four topmost leaves; T6, removal of six topmost leaves from maize plants were applied at first-trifoliate stage (V1) of soybean) on photosynthetically active radiation transmittance (PART), red to far-red ratio (R:FR), morphological and photosynthetic characteristics and total biomass production at second-trifoliate stage (V2), fifth-trifoliate stage (V5), and flowering-stage (R1) of soybean were investigated through field experiments for 2-years under MSR. Results As compared to T0, treatment T6 increased the PART and R:FR ratio at soybean canopy by 77% and 37% (V2), 70% and 34% (V5), and 41% and 36% (R1), respectively. This improved light environment in T6 considerably enhanced the leaf area index, SPAD values and photosynthetic rate of soybean plants by 66%, 25% and 49% at R1, respectively than T0. Similarly, relative to control, T6 also increased the stem diameter (by 29%) but decreased the plant height (by 23%) which in turn significantly increased stem breaking strength (by 87%) by reducing the lodging rate (by 59%) of soybean plants. Overall, under T6, relay-cropped soybean produced 78% of sole soybean seed-yield, and relay-cropped maize produced 81% of sole maize seed-yield. Our findings implied that by maintaining the optimum level of PART (from 60% to 80%) and R:FR ratio (0.9 to 1.1), we can improve morphological and photosynthetic characteristics of soybean plants in MSR. Therefore, more attention should be paid to the light environment when considering the sustainability of MSR via appropriate planting pattern selection.

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“…It is known that plant dry matter production often shows a positive correlation with the amount of intercepted radiation by crops in intercropping system [37]. Low light levels available for shaded soybean plants might have caused a restriction of their genetic potential resulting in the modification of their growth pattern [38]. were different significantly among soybean cultivars in both seasons (Table 7).…”

Section: Mandarin Fruit Yield and Its Attributesmentioning

confidence: 99%

Interplanting Some Soybean Cultivars with Mandarin Trees in Sandy Soil

Selim¹,

Hefny²,

Abdel-Wahab³

et al. 2020

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Two-year field experiments were carried out at El-Kassasen Horticultural Research Station, Agricultural Research Center (ARC), Ismailia government, Egypt, during 2018 and 2019 summer seasons to evaluate some soybean cultivars for interplanting with mandarin trees to achieve high productivity of both crops, land usage and profitability under sandy soil conditions. The treatments were the combinations of two cropping systems (interplanting and solid cultures) and five soybean cultivars (Giza 21, Giza 22, Giza 35, Giza 82 and Giza 111). A strip plot design with three replications was used. Interplanting soybean cultivar Giza 22 with mandarin trees gave a higher total count of rhizobia in rhizosphere of mandarin roots after 75 days from soybean sowing than the other treatments in both seasons. The highest fruit weight and volume, total soluble solids (T.S.S.), fruit yields per tree and per ha were obtained by growing soybean cultivar Giza 22 or Giza 111 with mandarin compared with the other treatments in both seasons. With respect to soybean crop, interplanting soybean with mandarin trees decreased percentages of light intensity at the middle and bottom of the plant, chlorophylls a and b, as well as, plant dry weight after 75 days from soybean sowing compared with those of solid culture in both seasons. Soybean cultivars Giza 22 and Giza 82 had higher light intensity at the middle and bottom of the plant, as well as chlorophyll a, meanwhile soybean cultivars Giza 22 and Giza 111 had higher plant dry weight than the other soybean cultivars after 75 days from soybean sowing in both seasons. Soybean cultivar Giza 22 and Giza 111 had higher plant dry weight than the other soybean cultivars under interplanting and solid plantings in both seasons. Interplanting soybean with mandarin trees decreased soybean seed yield and its attributes compared with soybean solid culture in both seasons. Soybean cultivars Giza 111 and Giza 22 How to cite this paper: Selim, M.A.Agricultural Sciences gave a higher number of pods per plant, seed yields per plant and per ha than the other cultivars in both seasons. Soybean cultivars Giza 111 and Giza 22 followed by Giza 82 recorded a higher number of pods per plant, seed yields per plant and per ha under interplanting and solid cultures than the other treatments in both seasons. Interplanting soybean cultivar Giza 22 and Giza 111 with mandarin trees achieved higher LER, LEC, total return and MAI than solid culture of mandarin. Growing four ridges of soybean cultivars Giza 22 or Giza 111 between mandarin trees cultivar Fremont had higher productivity, land usage and profitability than mandarin solid culture under sandy soil conditions.

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The effect of light intensity on the growth, development and yield of soybean in Southwest Nigeria

Cited by 9 publications

References 0 publications

Optimum leaf excision increases the biomass accumulation and seed yield of maize plants under different planting patterns

Optimum leaf excision increases the biomass accumulation and seed yield of maize plants under different planting patterns

Growth and development of soybean under changing light environments in relay intercropping system

Interplanting Some Soybean Cultivars with Mandarin Trees in Sandy Soil

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