Integrated Use of Herbicide and Crop Mulch in Suppressing Weed Growth in a Dry-Seeded Rice SystemReportar como inadecuado




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Dry-seededrice production systems are increasing in many Asian countries because of laborand water scarcities. However, weeds are the main biological constraints inthese systems. Herbicides are widely used to manage weeds but they do notprovide effective weed control. The use of crop residue as mulch can suppressweed emergence and weed biomass but mulch alone does not provide effective weedcontrol. The integrated use of herbicide and mulch, however, could provide moreeffective and sustainable weed control in dry-seeded rice systems. A study wasconducted in two consecutive rice growing seasons to evaluate the combined effectof herbicide treated and nontreated and rice straw mulch 0, 2, and 4 t.ha-1 on weed growth and rice yield ina dry-seeded rice system. In the nontreated plots, weed biomass decreased withincreases in mulch amounts, whereas weed biomass in the herbicide-treated plotswas similar at different mulch amounts. Overall, herbicide treatments providedbetter weed control than the mulch treatments. In the nontreated plots, grainyield was similar at different mulch amounts, whereas grain yield in theherbicide-treated plots was greater when the field was mulched with 4 t.ha-1 of rice straw than with no mulch or mulched with only 2 t.ha-1 ofrice straw. The results suggest that integrated use of mulch andherbicides can help weed control and increase crop yield in dry-seededrice.

KEYWORDS

Grain Yield; Integrated Weed Management; Rice Residue; Weed Biomass

Cite this paper

B. Chauhan and S. Abugho -Integrated Use of Herbicide and Crop Mulch in Suppressing Weed Growth in a Dry-Seeded Rice System,- American Journal of Plant Sciences, Vol. 4 No. 8, 2013, pp. 1611-1616. doi: 10.4236-ajps.2013.48195.





Autor: Bhagirath Singh Chauhan, Seth Bernard Abugho

Fuente: http://www.scirp.org/



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