Optimizing N fertilizer use for sesame under rain fed and irrigation conditions in Northern Ethiopia  

作　　者：Zenawi Gebregergis Fiseha Baraki Goitom Teame 

机构地区：[1]Tigray Agricultural Research Institute(TARI),Humera Agricultural Research Center(HuARC),P.O.Box 62,Humera,Ethiopia

出　　处：《Oil Crop Science》2023年第4期252-258,共7页中国油料作物学报(英文版）

基　　金：supported financially by Tigray Agricultural Research Institute,Humera Agricultural Research Center.

摘　　要：Inappropriate use of fertilizers is one of the major production constraints in sesame. Studies on N fertilizer optimization on sesame were conducted at Humera Agricultural Research Center(Hu ARC) under rain fed and irrigation conditions. Thirteen(13) N doses were evaluated in a Randomized Complete Block Design(RCBD)during 2016–2018 for rainfed conditions and 2017 to 2019 for irrigation conditions. The study was conducted with objective to optimize N fertilizer use for sesame. In the rainfed condition, the results demonstrated a prolonged duration to reach 50% flowering with higher nitrogen(N) application rates. The application of 52.5–110kg N ha^(-1) resulted in significantly higher seed yield, while lower(18 kg N ha^(-1)) and higher(156 kg N ha^(-1)) doses of N led to reduced seed yield. Under irrigation conditions, superior seed weights and maximum seed yield were observed at 64 and 75 kg N ha^(-1), whereas lower N doses resulted in diminished seed yield. The agronomic efficiency of N fertilizer(N-AE) was found to be highest at the rate of 64 kg N ha^(-1) under both growing conditions.The partial budget analysis revealed that applying 64 kg N ha^(-1) for rainfed cultivation and between 64 and 75 kg N ha^(-1) for irrigated sesame production yielded greater net profit, MRR, and residual ranking. Therefore, it is recommended to apply a rate of 64 kg N ha^(-1) for rainfed sesame cultivation and between 64 up to 75 kg N ha^(-1) for the irrigated sesame inorder to increase the productivity of this crop.

关 键 词：SESAME N agronomic efficiency N fertilizer optimization Sesame productivity and seed yield 

分 类 号：S565.3[农业科学—作物学]