Bell, M. J. and Muchow, R. C. and Wilson, G. L. (1987) The effect of plant population on peanuts (Arachis hypogaea) in a monsoonal tropical environment. Field Crops Research, 17 (2). pp. 91-107.
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Abstract
The responses in the growth of groundnuts cv. Florunner to plant density and spatial ratio (ratio of interrow:intrarow spacing) in a tropical monsoonal environment were investigated. Biological yield (aboveground biomass + pods) was unresponsive to spatial ratio over the range 1:1-1:7.19, but increased markedly (12 600-16 900 kg/ha), with increasing density up to 588 000 plants/ha. Economic yield (commercially recoverable pods and seeds) was relatively unresponsive to plant density in the range of 88 000-394 000 plants/ha, after which a marked decline was recorded. Economic yields were max. at square plant-arrangements (6900 kg pods or 5200 kg/ha seeds), but were unaffected by increasing plant rectangularity from spatial ratios of 1:2.15-1:7.19 (6100 kg pods or 4600 kg seeds/ha). The increase in yield with increasing plant density was primarily attributed to differences in the amount of photosynthetically active radiation intercepted (I), which was evident during both vegetative growth and seed development. In contrast, I was unresponsive to spatial ratio. Neither density nor spatial ratio affected the av. efficiency of conversion (Ec) of I to yield during vegetative growth (2.6-3.0 g/MJ) nor during the entire life-cycle (2.1-2.3 g/MJ). Av. Ec during seed development was 55-60% of that during vegetative growth. Thus the higher economic yield of the square plant-arrangement was not associated with changes in I and Ec, but was associated with greater partitioning of DM to reproductive yield and a greater proportion of total pods recovered at harvest
| Item Type: | Article |
|---|---|
| Author Affiliation: | Western Australia Dep. Agric., Kununurra, WA 6743, Australia |
| Subjects: | Atmosperic Science > Climatology Plant Production |
| Divisions: | Groundnut |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 24 Sep 2012 09:03 |
| Last Modified: | 24 Sep 2012 09:03 |
| Official URL: | http://dx.doi.org/10.1016/0378-4290(87)90085-2 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/7450 |
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