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

Worku, Walelign; Demisie, Walelign

doi:10.3923/ja.2012.85.93

Cited by 19 publications

(9 citation statements)

References 19 publications

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“…Moreover, such increase in LAI and leaf area of the fourth leaf and whole plant could be due to high light interception and light use efficiency. Similar results have also been reported in other crops such as in pigeon pea (Worku and Demisie 2012) and in wheat (Wajid et al 2004). …”

Section: Discussionsupporting

confidence: 85%

Leaf gas exchange, source–sink relationship, and growth response of cotton to the interactive effects of nitrogen rate and planting density

et al. 2017

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Nitrogen (N) rate and plant density (PD) are important factors for sustainable cotton production. The objective of this study is to examine the effects of nitrogen rate and plant density on plant growth, source-sink relationship, and cotton yield. A split-plot arrangement was used in the field experiment with the main plots assigned to N rate (120 and 180 kg/ha), and the sub-plots assigned to plant density (8, 10, and 12 plants/m 2 ). Results showed significant N and PD interaction on plant growth, leaf gas exchange, and yield. Higher plant growth and cotton yield were noted under low nitrogen rate and high planting density than other treatment combinations. Leaf photosynthesis, stomatal conductance, intercellular CO 2 , transpiration rate, and water use efficiency were considerably influenced by planting density and nitrogen rate. Maximum values of these traits were obtained under low nitrogen rate with high planting density or high nitrogen rate with medium planting density, while the least values were under low nitrogen rate with low planting density. Correlation analysis revealed highly significant and positive relation between leaf gas exchange and cotton yield.

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Section: Discussionsupporting

confidence: 85%

Leaf gas exchange, source–sink relationship, and growth response of cotton to the interactive effects of nitrogen rate and planting density

et al. 2017

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“…For wheat, they range from 1.92 to 3.42 g C MJ −1 (García et al, 1988;Lobell et al, 2002;Muurinen and Peltonen-Sainio, 2006;O'Connell et al, 2004). Reported values for peas range from 1.52 to 2.11 g C MJ −1 (Giunta et al, 2009;Lecoeur and Ney, 2003;Worku and Demisie, 2012). For canola and rapeseed, the values are 2.16 and 2.05, g C MJ −1 , respectively (Justes et al, 2000;Soetedjo et al, 1998), and for rye they range from 2.04 to 3.60 g C MJ −1 (Akmal and Janssens, 2004).…”

Section: Maximum Light Use Efficiencymentioning

confidence: 99%

Analysis of air mass trajectories in the northern plateau of the Iberian Peninsula

Pérez

Sánchez

García

et al. 2015

Journal of Atmospheric and Solar-Terrestrial Physics

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This paper presents: (a) results of gross primary production (GPP) 8-d estimated values using a light use efficiency model (LUE) in a non-irrigated rotating rapeseed crop in the upper Spanish plateau, and (b) inter-comparison results of observed GPP with those concurrently retrieved by MODIS. The rotation scheme over the four-year study comprised rapeseed, wheat, peas and rye. Rapeseed, peas and, in part, rye grew under well-watered conditions whereas wheat was dominated by drought. Input data for the LUE model were the fraction of PAR absorbed (FPAR) 8-d products supplied by MODIS (FPAR MODIS), in situ photosynthetic active radiation (PAR) measurements and a scalar f varying between 0 and 1, to take into account the reduction of the maximum PAR conversion efficiency (ε 0LUE) under limiting environmental conditions. In this study, f values were assumed to be dependent on air temperature (T) and the evaporative fraction which was considered a proxy of water availability. ε 0LUE , a key parameter in LUE models, which varied according to land use, was derived through the results of a linear regression fit between observed GPP and concurrent G APAR estimates defined as the product of PAR, FPAR MODIS and f. Overall, the LUE model provided satisfactory results, R 2 = 86.3%, significantly improving GPP MODIS estimates (GPP MODIS), R 2 = 71.8%. GPP MODIS uncertainties have primarily been attributed to differences in the f stress factor involved in its formulation (f MODIS) depending on vapour pressure deficit and T which did not fully describe the environmental stress conditions at the measuring site. Overall, ε 0LUE yielded 3.33 ± 0.10 g C MJ −1 although this varied depending on crop architecture, phenology and prevailing meteorological conditions. Crop-to-crop ε 0LUE ranged from 2.74 ± 0.17 to 3.95 ± 0.19 g C MJ −1 for peas and rye, respectively, yielding intermediate values for rapeseed and wheat, 2.92 ± 0.18 and 2.86 ± 0.23 g C MJ −1 , respectively. ε 0MODIS , derived from the linear fit of GPP versus GPP MODIS estimates, yielded 2.13 ± 0.10 g C MJ −1 and crop-to-crop ranged from 1.28 ± 0.17 to 2.41 ± 0.12 g C MJ −1 for wheat and rapeseed, respectively. The best linear fits corresponded to crops growing under well-watered conditions, rapeseed and peas, and the worst fits were for wheat, affected by drought. GPP annuals were 1680, 710, 730 and 1410 g C m −2 for rapeseed, wheat, peas and rye, respectively.

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“…This condition proves that place contributes to the color of the stem. Planting density of pigeon pea can be used as an important management tool to improve leaf area index, light interception, radiation use efficiency and hence productivity (Worku and Demisie, 2012). Irawan and Kartika (2008) have revealed that light intensity affects the color of the stem surface, where pigment regulation is in the epidermal or parenchymal tissues.…”

Section: Stem Morpholgymentioning

confidence: 99%

The Characterization of Black Pigeon Pea (Cajanus cajan) in Gunungkidul, Yogyakarta

Yuniastuti

Sukaya

Dewi

et al. 2020

Caraka Tani J. Sustain. Agric.

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Pigeon pea (<em>Cajanus cajan</em>) is potential as an alternative source of protein other than soybeans and is tolerant to dry conditions, but the cultivation of this plant has not been intensively carried out in Indonesia. This research aims to explore the characteristics of black pigeon pea and investigate the producing areas of black pigeon peas in Gunungkidul. Based on the field survey, 30 types of black pigeon peas were found. They were located in Pringapus and Klopoloro 1 Hamlets. This research was conducted on March-June 2018 in Yogyakarta. The observation variables in this study include research environmental condition and plant morphology, for examples, stems, leaves, flowers, pods and seeds. Morphological data were analyzed using NTSYS program. The results show that the height of pigeon pea plants ranged from 63 to 176 cm, the number of branches ranged from 18 to 35, the colors of stem were green to purple and the stem thickness was >13 mm. The similiarity of the coefficient value of pigeon peas in Pringapus ranged between 84% and 95%, while the similarity in Klopoloro 1 varied between 80% and 97%.

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

Cited by 19 publications

References 19 publications

Leaf gas exchange, source–sink relationship, and growth response of cotton to the interactive effects of nitrogen rate and planting density

Leaf gas exchange, source–sink relationship, and growth response of cotton to the interactive effects of nitrogen rate and planting density

Analysis of air mass trajectories in the northern plateau of the Iberian Peninsula

The Characterization of Black Pigeon Pea (Cajanus cajan) in Gunungkidul, Yogyakarta

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