Effects of planting density on water use and productivity of pearl millet (Pennisetum typhoides) grown on stored water. II. Water use, light interception and dry matter production

Azam-Ali, S N and Gregory, P J and Monteith, J L (1984) Effects of planting density on water use and productivity of pearl millet (Pennisetum typhoides) grown on stored water. II. Water use, light interception and dry matter production. Experimental Agriculture, 20 (3). pp. 215-224. ISSN 0014-4797

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Abstract

Pearl millet [Pennisetum americanum] was grown on stored water at Niamey, Niger, at row spacings of 38, 75 or 150 cm. Water extraction based on neutron probe readings was compared with crop transpiration using a porometer and allied measurements. Between 23 and 52 days after sowing, plants at the narrow and medium spacings used c. 77 and 100 mm of water, resp., and those at the wide spacing used between 59 and 75 mm. Estimates of seasonal crop evaporation from leaf resistances and from the green LAI of the crops were 103, 130 and 123 mm for the narrow, medium and wide spacings, resp. The water use/g dry wt. produced was similar for both narrow and medium spacings but water was used more efficiently in the wide spacing. Dry wt. increased in proportion to intercepted radiation with the same efficiency (1.3 g/MJ) irrespective of spacing

Item Type: Article
Divisions: UNSPECIFIED
CRP: UNSPECIFIED
Subjects: Mandate crops > Millets
Depositing User: Mr B K Murthy
Date Deposited: 21 Jun 2012 09:33
Last Modified: 21 Jun 2012 09:33
URI: http://oar.icrisat.org/id/eprint/5961
Official URL: http://dx.doi.org/10.1017/S0014479700017786
Projects: UNSPECIFIED
Funders: Overseas Development Administration
Acknowledgement: We are grateful to the Overseas Development Administration for financing this work and to Drs D. Riyks and J. Denis and Mr P. Vossen for their considerable assistance in the management of this experiment.
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