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Physiological basis of yield variation in response to row spacing and plant density of mungbean grown in subtropical environments

Rachaputi, Rao C. N. and Chauhan, Yashvir and Douglas, Col and Martin, William and Krosch, Stephen and Agius, Peter and King, Kristopher (2015) Physiological basis of yield variation in response to row spacing and plant density of mungbean grown in subtropical environments. Field Crops Research, 183 . pp. 14-22.

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Article Link(s): http://dx.doi.org/10.1016/j.fcr.2015.07.013

Publisher URL: http://www.sciencedirect.com/science/article/pii/S0378429015300162

Abstract

In this study, we investigated the extent and physiological bases of yield variation due to row spacing and plant density configuration in the mungbean Vigna radiata (L.) Wilczek variety “Crystal” grown in different subtropical environments. Field trials were conducted in six production environments; one rain-fed and one irrigated trial each at Biloela and Emerald, and one rain-fed trial each at Hermitage and Kingaroy sites in Queensland, Australia. In each trial, six combinations of spatial arrangement of plants, achieved through two inter-row spacings of 1 m or 0.9 m (wide row), 0.5 m or 0.3 m (narrow row), with three plant densities, 20, 30 and 40 plants/m2, were compared. The narrow row spacing resulted in 22% higher shoot dry matter and 14% more yield compared to the wide rows. The yield advantage of narrow rows ranged from 10% to 36% in the two irrigated and three rain-fed trials. However, yield loss of up to 10% was also recorded from narrow rows at Emerald where the crop suffered severe drought. Neither the effects of plant density, nor the interaction between plant density and row spacing, however, were significant in any trial. The yield advantage of narrow rows was related to 22% more intercepted radiation. In addition, simulations by the Agricultural Production Systems Simulator model, using site-specific agronomy, soil and weather information, suggested that narrow rows had proportionately greater use of soil water through transpiration, compared to evaporation resulting in higher yield per mm of soil water. The long-term simulation of yield probabilities over 123 years for the two row configurations showed that the mungbean crop planted in narrow rows could produce up to 30% higher grain yield compared to wide rows in 95% of the seasons.

Item Type:Article
Business groups:Crop and Food Science
Keywords:Mungbean Row configurations Water-use efficiency Radiation-use efficiency Harvest index
Subjects:Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Plant culture > Food crops
Deposited On:13 Aug 2015 05:53
Last Modified:13 Aug 2015 05:54

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