Determination of Leafy Vegetables Need in Water andNitrogen Use Efficiency by Using the Diviner 2000 andthe Isotopes Techniques: Case of Amaranth(Amaranthus cruentus)  

作　　者：NoupéDiakaria Coulibaly Lassina Fondio Thierry Lekadou Isaya Sijali Mako François De Paul N’Gbesso Catherine Kibunja 

机构地区：[1]Centre National de Recherche Agronomique(CNRA),01 BP 633,Bouaké01,Côte d’Ivoire [2]Kenya Agricultural and Livestock Research Organization(KALRO),P.O.Box 57811,Nairobi City,Kenya

出　　处：《Journal of Agricultural Science and Technology(B)》2020年第3期134-143,共10页农业科学与技术（B）

基　　金：The authors’ thanks go to the International AtomicEnergy Agency (IAEA) for funding the fellowshipand experiments. Their gratitude goes to the authorities of the National Centre for AgronomicResearch (CNRA) and the IAEA National LiaisonOfficers (NLO) of Côte d’Ivoire who made thisfellowship possible. Their thanks also go to theauthorities of Kenya Agricultural and LivestockResearch Organization (KALRO) and Irrigation andDrainage Management and Problem of Soil (IDMPS)Program for hosting the fellowship.

摘　　要：A study was conducted to determine how the nitrogen(N)in the fertilisers can be quantified and what amounts of fertilizers should be given to leafy vegetables to achieve their requirements.This study also aimed to determine the efficient use of water by the plant.The experiment was laid out in a randomized complete block with three replicates and three levels of urea(T0=0 kg/ha,T1=43.5 kg/ha,T2=65 kg/ha).Estimation of growth parameters and biomass yield revealed that the treatments produced statistically identical values.But numerically,T1(43.5 kg of urea/ha)gave the highest yields and T2(65 kg of urea/ha)produced the lowest.It was the same for the determination of the water use efficiency(WUE)by the plant where T1 produced the highest values compared to T2.The yield curve as a function of the applied urea dose allowed the identification of the urea dose that corresponds to optimal yield in amaranth.From the dose of 65 kg of urea/ha,any increase becomes harmful to the plant.This results in a decrease in yield in the amaranth plant.

关 键 词：AMARANTH leafy vegetable nitrogen biomass yield efficient use of water. 

分 类 号：O57[理学—粒子物理与原子核物理]