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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Growth, light interception and radiation use efficiency response of pigeon pea (cajanus cajari) to planting density in Southern Ethiopia
Journal of Agronomy, Volume 11, No. 4, Year 2012
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Description
Planting density is a vital management tool that could be used to enhance productivity. A field experiment was conducted to examine the response of two pigeon pea varieties (ICPL 87091 and ICP 15027) to five planting densities (166666, 200000, 250000, 333333 and 500000 plants ha1). A split plot design with variety as main plot factor and planting density as sub plot factor was used. Samples were taken every two weeks until physiological maturity starting from 30 Days after Sowing (DAS). The upper two densities, 333333 and 500000 plants ha-1, had greater Leaf Area Index (LAI) and fractional interception (f) during most of the growth period and attained full interception at 105 DAS. The remaining three densities had lower LAI and f and did not attain full interception. Cumulative Intercepted Photosynthetically Active Radiation (CIPAR), extinction coefficient (k) and Radiation Use Efficiency (RUE) increased with rising planting density though moderately for the later. There was a positive linear relationship between dry matter production per area and planting density. Dry matter was significantly correlated with LAI (r = 0.90), CTPAR (r = 0.98) andRUE (r = 0.88). The two varieties had similar productivity potential with similar leaf are indices, CIPAR, k and RUE values. The RUE values obtained were 1.81 g MJ1 PAR for variety ICPL 87091 and 1.86 g MJ1 PAR for variety ICP 15027. Because of pigeon pea's adaptation to drought, it will be useful to study its response to planting density under contrasting moisture levels. © 2012 Asian Network for Scientific Information.
Authors & Co-Authors
Worku, Walelign Girmay
Ethiopia, Awassa
Hawassa University
Demisie, Walelign
China, Hangzhou
Zhejiang University
Statistics
Citations: 19
Authors: 2
Affiliations: 2
Identifiers
Doi:
10.3923/ja.2012.85.93
ISSN:
18125379
e-ISSN:
18125417
Research Areas
Cancer
Study Approach
Quantitative
Study Locations
Ethiopia