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Tạp chí quốc tế 2022
Số tạp chí 2022(2022) Trang:
Tạp chí: Applied and Environmental Soil Science

­e aim of this study was to determine the proper combination of nitrogen (N) fertilizer level and nitrogen ‡xing endophytic bacteria (NFEB) supplementation for the maximum grain yield of sesame cultivated in alluvial soil in dykes. ­e experiment followed a completely randomized block design with two factors. ­e ‡rst one was the levels of N fertilizer used, including 0, 50, 75, and 100% N of recommended fertilizer formula (RFF), and the other consisted of no bacteria applied, an individual strain of Enterobacter cloacae ASD-48 or E. cloacae ASD-21 applied, and their mixture, with 5 replicates. ­e results revealed that fertilizing with 100% N of RFF led to an enhancement of the plant height (16.8 cm), the chlorophyll a and b and their total content (6.45, 1.86, and 8.30 μg mL−1 ), the number of capsules per plant (7.22 capsules plant−1 ), the total N uptake (126.5 mg N pot−1 ), and the grain yield (9.08 g pot−1 ), in comparison to no N fertilizer applied. Supplementation of two NFRB strains enhanced the soilconcentrations of NH4 + and NO3 − , the total N uptake, and the grain yield. ­e treatment fertilized with 75% N of RFF plus an individual NFEB strain or their bacterial mixture had equivalent total N uptake to that the treatment fertilized with 100% N of RFF had, 120.8–125.5 mg N pot−1 compared to 124.4 mg N pot−1 . Regarding the sesame yield, with a reduction by 25–50% N of RFF plus ASD-48 and ASD-21, either individually or in mixture, it increased by 2.39–8.56%, compared to that in the treatment fertilized with 100% N of RFF.

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