Graphical Determination of Leaf Area Index and its Relationship with Growth and Yield Parameters of Sorghum (Sorghum bicolor L. Moench) as Affected by Fertilizer Application

Addai, Isaac Kwahene; Alimiyawo, M.

doi:10.3923/ja.2015.272.278

Cited by 13 publications

(11 citation statements)

References 11 publications

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“…Several approaches; mainly indirect and direct methods of LA measurement have been developed (Blanco & Folegatti, 2003). Although the former method; indirect estimation, has been recommended for monitoring LAI through time and across large spatial areas (Jonckheere et al, 2004), there is however the disadvantage of it being expensive and mostly non-existence in most developing countries (Addai & Alimiyawo, 2015). Consequently, direct methods of estimating LAI have been widely adopted because of the unaffordability and difficulty in assessing leaf area instruments (Dugje & Odo, 2006).…”

Section: Introductionmentioning

confidence: 99%

Direct Estimation of Maize Leaf Area Index as Influenced by Organic and Inorganic Fertilizer Rates in Guinea Savanna

Berdjour¹,

Rahman²,

Odoom³

et al. 2020

JAS

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Leaf area index (LAI) plays an important role in radiation capture, crop growth and yield formation. However, there is limited quantitative data on the influence of poultry manure (PM) and NPK fertilizer rate (NPK) on LAI, as estimated directly. Using a split-plot design with three replications, a field experiment was conducted to determine the effects of three PM rate (0, 2 and 4 t/ha) as main plot and three NPK rate (0:0:0, 60:30:30 and 120:60:60 kg N P2O5 K2O/ha) as sub plot, on LAI and maize grain yield. The maize was planted at a density of 106,666 plants/ha; two rows on a ridge, one plant per stand at 75 × 25 cm. Linear regression was used to establish predictive equations among correlated variables and to describe the degree of associations. The application of PM in maize increased (p < 0.05) number of leaves/plant (NL) at 8 and 10 weeks after sowing maize (WASM). NL, leaf area constant at 6 and 10 WASM, leaf area (LA) and LAI were significantly affected by NPK. LAI correlated positively with NL, LA and grain yield. The coefficient of determination between actual and estimated LA was in the range of 0.85-0.97. The PM × NPK interaction was significant on maize grain yield. The results suggest that small-scale maize farmers faced with challenges in obtaining and transporting large quantities of poultry manure can use 2 t PM/ha with either 60:30:30 kg N P2O5 K2O/ha or 120:60:60 kg N P2O5 K2O/ha to increase grain yield of maize.

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Section: Introductionmentioning

confidence: 99%

Direct Estimation of Maize Leaf Area Index as Influenced by Organic and Inorganic Fertilizer Rates in Guinea Savanna

Berdjour¹,

Rahman²,

Odoom³

et al. 2020

JAS

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“…These were corroborated by earlier work of Bavec et al (2007), who reported that variety had influence on leaf area index (LAI) of winter wheat. Addai and Alimiyawo (2015) also reported the influence of variety on LAI in Sorghum (Sorghum bicolor L. Moench). The control (unmulch) had the lowest plant height followed by groundnut (live mulch).…”

Section: Discussionmentioning

confidence: 99%

Effect of varieties and mulch types on foliar insect pests of okra [<i>Abelmoschus esculentus</i> L. (Moench)] in a humid tropical environment

Ojiako¹,

Ibe²,

Ogu³

et al. 2019

Agrosearch

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The effect of varieties and mulch types were evaluated on some vegetative insect pests of okra (Abelmoschus esculentus) at the Federal University of Technology, Owerri, Nigeria. A 3 x 5 factorial in randomized complete block design (RCBD) was used to lay out the trial. Three varieties of okra (NHAe47-4, V35 and Lady's finger) and five mulch types [dry palm fronds, dry grass, black polyethylene, groundnut (live mulch) and unmulch (as control)] were used as treatments. Ten tonnes per hectare (10 t ha -1 ) of dry grass and dry palm fronds, respectively, were applied before planting. The black polyethylene mulch was applied to fit the 1 m x 3 m plot size. Groundnut seeds were planted between the okra plants, at a spacing of 60 cm x 25 cm, as live mulch. A 60 cm x 45 cm spacing was used to sow the okra seeds. Data collected were plant height, number of leaves, leaf area and number of damaged leaves. At different developmental phases of the crop, insect pests were sampled. Results indicated mulch application had significant effect on insect pest leaf damage whereas no significant differences existed between the varieties used. Black polyethylene mulch treated plants had the least insect pests attack and consequently, the lowest number of damaged leaves. The flea beetle Podagrica spp., cotton leaf roller Notarcha derogata, cotton strainer Dysdercus spp., whitefly Bemisia tabaci and Nigerian grasshopper Oedaleus nigeriensis were identified as the major vegetative insect pests of okra. It may be concluded that okra cultivated with plastic mulch reduced insect pests and produced healthier plants.

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“…LAI is a dimensionless quantity that characterizes an ecosystem canopy [54]. According to Addai and Alimiyawo [55], a higher LAI value would indicate greater photosynthetic activity that results in increased development and yield of the crop. Chakraborty et al [56] also concluded that LAI tended to increase with PAR interception due to the increment in canopy volume.…”

Section: Leaf Area Index (Lai)mentioning

confidence: 99%

Radiation Dynamics on Crop Productivity in Different Cropping Systems

Arina

Martini

Surdiana

et al. 2021

International Journal of Agronomy

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Global demand for food has always been on the increase due to the increase of the population in this world. Intercropping is one of the alternatives of agronomic practices that is widely practiced in ensuring food security and enhancing yield stability. Strip, mixed, and relay intercropping can be practiced to increase crop production. In addition to achieving a successful intercropping system, factors such as suitable crops, time of sowing, maturity of the crop, and plant density need to be considered before and during planting. Besides, practiced intercropping becomes a useful cropping system to increase efficient resource utilization, enhance biodiversity, promote soil health, enhance soil fertility, erosion control, yield advantage, weed, pest, and disease control, insurance against crop failure, ecosystem and modification of microclimate, market instability, and increase farmers income. Crop productivity in any types of cropping system implemented relies primarily on the interception of photosynthetically active radiation (PAR) of crop canopy and conversion of intercepted radiation into biomass or known as radiation use efficiency (RUE). Both PAR and RUE are important measurements that have significant roles in crop growth and development in which the accessibility of these radiation dynamics is connected with the leaf area index and crop canopy characteristics in maximizing yield as well as total productivity of the crop component in intercropping systems.

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Graphical Determination of Leaf Area Index and its Relationship with Growth and Yield Parameters of Sorghum (Sorghum bicolor L. Moench) as Affected by Fertilizer Application

Cited by 13 publications

References 11 publications

Direct Estimation of Maize Leaf Area Index as Influenced by Organic and Inorganic Fertilizer Rates in Guinea Savanna

Direct Estimation of Maize Leaf Area Index as Influenced by Organic and Inorganic Fertilizer Rates in Guinea Savanna

Effect of varieties and mulch types on foliar insect pests of okra [<i>Abelmoschus esculentus</i> L. (Moench)] in a humid tropical environment

Radiation Dynamics on Crop Productivity in Different Cropping Systems

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