Using upland rice root traits to identify N use efficient genotypes for limited soil nutrient conditions
2013
v.b. bado | o. traore | k. traore
K. Traore, O. Traore, V.B. Bado, 'Using upland rice root traits to identify N use efficient genotypes for limited soil nutrient conditions', IAEA TECDOC SERIES no. 1721 Optimizing Productivity of Food Crop Genotypes in Low Nutrient Soils, pp.275-286, 2013
显示更多 [+] 显示较少 [-]Crop production in the Sahelian countries of Africa is limited by many factors. The most important are low potential yields of local varieties, low inherent soil fertility and low applications of external inputs (organic and mineral fertilizers). A field experiment was conducted from 2007 to 2008 with the objective to develop and validate screening protocols for plant traits that enhance N acquisition and utilization in upland rice grown in low N soils of two hundred (200) upland rice (Oryza sativa L.) genotypes from WAB, NERICA, CNA, CNAX, IRAT and IR lines. An experiment in small pots was carried out in a greenhouse of Farakoba research center. The pots were filled with a sandy soil and upland rice genotypes were grown during three weeks, harvested and studied for their root characteristics (seminal root length, adventitious root number, lateral root length and number and roots hair density). The small pot method was reliable for root trait characterisation at the seedling stage. A large variability among genotypes was exhibited for the root characteristics. The variability was larger within the NERICA and WAB lines compared to the other lines. The length of the seminal roots varied from 10 to 40 cm, the lateral root number ranged between 3 and 15 and the number of adventitious roots varied between 2 and 7. The selected root traits can be used to identify high nutrients and water use efficient genotypes.
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