Flood-tolerant rice reduces yield variability and raises expected yield, differentially benefitting socially disadvantaged groups

Approximately 30% of the cultivated rice area in India is prone to crop damage from prolonged flooding. We use a randomized field experiment in 128 villages of Orissa India to show that Swarna-Sub1, a recently released submergence-tolerant rice variety, has significant positive impacts on rice yield...

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Vydáno v:	Scientific reports Ročník 3; číslo 1; s. 3315
Hlavní autoři:	Dar, Manzoor H., de Janvry, Alain, Emerick, Kyle, Raitzer, David, Sadoulet, Elisabeth
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	London Nature Publishing Group UK 22.11.2013 Nature Publishing Group
Témata:	631/208/8 631/61/447/2312 Adaptation, Physiological - genetics At risk populations Crop damage Crop yield Crops, Agricultural - growth & development Cultivation Flood damage Flooding Floods Gene Expression Regulation, Plant Grain cultivation Humanities and Social Sciences multidisciplinary Oryza - growth & development Poverty Areas Random Allocation Rice Satellite Imagery Science Submergence Vulnerable Populations Orissa India India
ISSN:	2045-2322, 2045-2322
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Shrnutí:	Approximately 30% of the cultivated rice area in India is prone to crop damage from prolonged flooding. We use a randomized field experiment in 128 villages of Orissa India to show that Swarna-Sub1, a recently released submergence-tolerant rice variety, has significant positive impacts on rice yield when fields are submerged for 7 to 14 days with no yield penalty without flooding. We estimate that Swarna-Sub1 offers an approximate 45% increase in yields over the current popular variety when fields are submerged for 10 days. We show additionally that low-lying areas prone to flooding tend to be more heavily occupied by people belonging to lower caste social groups. Thus, a policy relevant implication of our findings is that flood-tolerant rice can deliver both efficiency gains, through reduced yield variability and higher expected yield and equity gains in disproportionately benefiting the most marginal group of farmers.
Bibliografie:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23
ISSN:	2045-2322 2045-2322
DOI:	10.1038/srep03315