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Koffi Djaman Valere C. Mel Alpha B. Balde Boubie V. Bado Baboucarr Manneh Lamine Diop Denis Mutiibwa Daran R. Rudnick Suat Irmak Koichi Futakuchi 《Paddy and Water Environment》2017,15(3):469-482
Rice is the main crop produced in the Senegal River Valley under the semiarid Sahelian climate where water resource management is critical for the resource use sustainability. However, very limited data exit on rice water use and irrigation water requirement in this water scarcity environment under climate change conditions. Understanding crop water requirements is essential for better irrigation practices, scheduling and efficient use of water. The objectives of this study were to estimate crop water use and irrigation water requirement of rice in the Senegal River Valley at Fanaye. Field experiments were conducted during the 2013 hot and dry season and wet season, and 2014 hot and dry season and wet seasons. Three nitrogen fertilizer treatments were applied to rice variety Sahel 108: 60, 120, and 180 kg N ha?1. Rice water use was estimated by the two-step approach. Results indicated that crop actual evapotranspiration (ETa) varied from 632 to 929 mm with the highest ETa obtained during the hot and dry seasons. Irrigation water requirement varied from 863 to 1198 mm per season. Rice grain yield was function of the growing season and varied from 4.1 to 10.7 tons ha?1 and increased with nitrogen fertilizer rate. Rice water use efficiency relative to ETa and irrigation requirements increased with nitrogen fertilizer rate while rice nitrogen use efficiency decreased with the nitrogen fertilizer rates. The results of this study can be used as a guideline for rice water use and irrigation water requirement for the irrigation design projects, consultants, universities, producers, and other operators within rice value chain in the Senegal River Valley. 相似文献
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Rice genotype and fertilizer management for improving rice productivity under saline soil conditions
Djaman Koffi Mel Valere Boye Amith Diop Lamine Manneh Baboucarr El-Namaky Raafat Koudahe Komlan Futakuchi Koichi 《Paddy and Water Environment》2020,18(1):43-57
Paddy and Water Environment - Soil salinity is a threat to crop production in the Senegal River Delta where salt intrusion increases soil electrical conductivity and most of farmers had abandoned... 相似文献
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Brahima Kone Oikeh Sylvester Sitapha Diatta Eklou Somado Kotchi Valere Kanwar Lal Sahrawat 《Archives of Agronomy and Soil Science》2013,59(4):421-434
In West Africa, two-thirds of upland rice is grown on acidic phosphorus (P)-deficient soils. Phosphorus is one of the most limiting-nutrients affecting crop productivity. A three-year field experiment was conducted on a Ferralsol in Côte d'Ivoire to study the response of four interspecific rice cultivars and a sativa (control cultivar) to Tilemsi phosphate rock (PR) and soluble triple superphosphate (TSP) fertilizer. PR was applied at 0, 150, 300, and 450 kg ha?1 P once in the first year and residual effects were measured in the following years. TSP (0, 50, 100 and 150 kg ha?1 P) was applied yearly. More significant yield increasing (38%) was observed in the second year. Annual application of 50 kg P ha?1 as TSP or a one-time application of 150 kg P ha?1 as PR was the optimum rate for the production of all cultivars. Higher rates of P from TSP (100 and 150 kg P ha?1) gave 2–3 times greater residual P in soil than the optimum rate, inducing no further response of rice. Two interspecific cultivars were identified as the most acid- and low P-tolerant cultivars for improving rice production in West Africa humid forest zone. 相似文献
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