Physiological Basis for Yield Advantage in a Sorghum/Groundnut Intercrop Exposed to Drought.* 2. Plant Temperature, Water Status, and Components of Yield

Harris, D and Natarajan, M (1987) Physiological Basis for Yield Advantage in a Sorghum/Groundnut Intercrop Exposed to Drought.* 2. Plant Temperature, Water Status, and Components of Yield. Field Crops Research, 17 (3-4). pp. 273-288. ISSN 0378-4290

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Abstract

In a replacement series intercrop of two rows of groundnuts cv. Kadiri 3 alternating with one row of sorghum hybrid CSH-8, increases in grain and filled-pod wt/plant due to intercropping were large, especially in droughted stands. For sorghum, grain yields were 38% and 93% higher per unit row in the irrigated and drought treatments, resp., while intercropped groundnuts produced 81% more filled-pod wt per unit row than did sole stands during drought. Harvest index was larger for both species in the intercrops, by 8% and 33% in sorghum, and by 12% and 68% in groundnuts in irrigated and drought treatments, resp. In groundnuts, harvest index was increased in the irrigated intercrop because individual pods were heavier, whereas the intercrop subjected to drought produced twice as many pods per plant in comparison with the sole crop. There were large differences in plant temp. and water status between irrigated and drought stands throughout the post-rainy season, but mean differences between sole crops and intercrops within each water regime were small. Shading of groundnuts by sorghum in the intercrop ameliorated to some extent the effects of high temp. and water stress, especially in the droughted stands. This was particularly important during peg production. It is suggested that less damage to flowers in the drought intercrop resulted in more pegs forming pods than in the sole crop, leading to the observed advantage in harvest index in groundnuts

Item Type: Article
Divisions: UNSPECIFIED
CRP: UNSPECIFIED
Subjects: Mandate crops > Groundnut
Mandate crops > Sorghum
Others > Climate Change
Depositing User: Mr B K Murthy
Date Deposited: 09 Jun 2014 04:02
Last Modified: 09 Jun 2014 04:02
URI: http://oar.icrisat.org/id/eprint/8087
Official URL: http://dx.doi.org/10.1016/0378-4290(87)90040-2
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: UNSPECIFIED
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