National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China.
Microelement Research Center, Huazhong Agricultural University, Wuhan, China.
J Sci Food Agric. 2022 Jul;102(9):3563-3571. doi: 10.1002/jsfa.11700. Epub 2021 Dec 13.
Rapeseed (Brassica napus) is highly sensitive to nitrogen (N) and boron (B) deficiency; however, the synergistic effects of these elements on rapeseed production are poorly understood. The aim of this study was to investigate the effects of co-application of N and B on seed yield, N uptake and N use efficiency (NUE) of rapeseed. Three rapeseed cultivars (W10, ZS11 and HG) were treated with different N and B application rates, and the seed yield, N uptake and NUE were examined in 2-year field experiments.
The application of B fertilizer (4.5, 9 kg borax ha ) improved N uptake, NUE and seed yield. However, the magnitude of increase in seed yield by B fertilization was dependent upon the rate of N supply and genotype. The benefit of B was much greater at 180 kg N ha than at 0 or 60 kg N ha . The combination of N and B also improved N remobilization from sources (stems and husks) to sinks (seeds) and increased N recovery efficiency (NRE). Compared with the B-inefficient cultivar W10, the B-efficient cultivars ZS11 and HG were superior in growth, seed yield, N uptake and NUE on B deficient soils. Furthermore, B-efficient cultivars showed great potential in saving N input, and the yield increased by more than 40% under B deficiency conditions.
This study highlights a markedly synergistic effect of N and B nutrition on rapeseed NUE and yield production and shows that B-efficient genotypes can increase yield and reduce N inputs under B-deficient conditions. © 2021 Society of Chemical Industry.
油菜（甘蓝型油菜）对氮（N）和硼（B）缺乏非常敏感；然而，这些元素对油菜生产的协同作用还知之甚少。本研究旨在探讨 N 和 B 共施对油菜种子产量、N 吸收和 N 利用效率（NUE）的影响。在两年田间试验中，用不同的 N 和 B 施用量处理三种油菜品种（W10、ZS11 和 HG），并检测种子产量、N 吸收和 NUE。
硼肥（4.5、9 kg 硼砂/公顷）的施用提高了 N 吸收、NUE 和种子产量。然而，硼肥对种子产量的促进作用大小取决于 N 供应和基因型。在 180 kg N/ha 时，硼肥的效益远大于 0 或 60 kg N/ha 时。N 和 B 的组合还改善了从源（茎和壳）到汇（种子）的 N 再动员，并提高了 N 回收效率（NRE）。与 B 低效品种 W10 相比，B 高效品种 ZS11 和 HG 在缺 B 土壤上表现出更好的生长、种子产量、N 吸收和 NUE。此外，B 高效品种在节省 N 投入方面具有很大潜力，在 B 缺乏条件下产量增加超过 40%。
本研究强调了 N 和 B 营养对油菜 NUE 和产量的协同作用，并表明 B 高效基因型在缺 B 条件下可以提高产量并减少 N 投入。 © 2021 英国化学学会。
