Inoculation With Growth-Promoting Bacteria Azospirillum brasilense and Its Effects on Productivity and Nutritional Accumulation of Wheat Cultivars
Inoculation With Growth-Promoting Bacteria Azospirillum brasilense and Its Effects on Productivity and Nutritional Accumulation of Wheat Cultivars
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DOI：
10.3389/fsufs.2020.607262
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发表时间：
2020-12-23
影响因子：
4.7
通讯作者：
Teixeira Filho, Marcelo Carvalho Minhoto
中科院分区：
文献类型：
--
作者：
Boleta, Eduardo Henrique Marcandalli;Shintate Galindo, Fernando;Teixeira Filho, Marcelo Carvalho Minhoto
为了养活不断增长的全球人口，以可持续方式提高生产力的农业实践正变得越来越必要。接种巴西氮螺旋菌可以减少合成矿质肥料的使用，具有促进植物生长和增加营养的有效能力。因此，本研究旨在研究巴西塞拉多地区两个小麦品种（CD1104和CD150）在灌溉条件下，巴西螺在增加宏量和微量元素积累方面的潜在作用及其对籽粒产量、株高和穗数的影响。研究是在免耕制度下的罗迪克Hapludox中进行的。试验采用随机分组设计，每组6个重复，按2 × 2因子设计：2个品种（CD150和CD1104）和2个接种水平（对照和接种巴西螺杆虫）。接种巴西芽孢杆菌后，小麦地上部微量元素积累量较大。在CD1104中，B和Cu的积累量分别比无菌对照高27.7%和57.4%。在CD150中，偶氮螺旋菌对B、Fe和Mn的积累量分别比对照提高了43.8%、49.9%和22%，对Cu的积累量降低了21.9%。与CD1104相比，CD150具有更高的氮素积累效率（+35.5 kg N ha(-1)）。接种与品种间的互作导致CD150茎部S、K积累量增加，CD1104茎部Cu积累量增加。在生长评估中，接种或品种对小麦籽粒产量和穗群没有统计学影响。而在株高方面，CD1104基因型比CD150基因型平均株高13.1%。接种对小麦营养的贡献更具可持续性。
Agricultural practices that allow a productive increase in a sustainable manner are becoming increasingly necessary to feed an ever-growing global population. The inoculation with Azospirillum brasilense has the potential to reduce the use of synthetic mineral fertilizers with efficient capacity to promote plant growth and increase nutrition. Therefore, this research was developed to investigate the potential use of A. brasilense to increase the accumulation of macro- and micronutrients and its influence on grain yield, plant height, and spike population in two wheat cultivars (CD1104 and CD150), under irrigated conditions in the Brazilian Cerrado. The study was carried out in a Rhodic Hapludox under a no-tillage system. The experiment was designed in randomized blocks with six replications, arranged in a 2 x 2 factorial scheme: two cultivars (CD150 and CD1104) and two levels of inoculation (control and with A. brasilense). The inoculation with A. brasilense provided greater accumulation of micronutrients in the aerial part of the wheat. In the cultivar CD1104, B and Cu had an accumulation 27.7 and 57.4% higher compared with those of the control without bacteria. In the cultivar CD150, Azospirillum increased the accumulation of B, Fe, and Mn by 43.8, 49.9, and 22%, respectively, and reduced Cu by 21.9%, compared with those of the control. The cultivar CD150 has greater efficiency to accumulate N (+35.5 kg N ha(-1)) as compared with the cultivar CD1104. Interactions between inoculation and cultivars resulted in greater accumulation of S and K in the shoot of the wheat cultivar CD150, as well greater accumulation of Cu in CD1104. In growth assessments, inoculation or cultivars did not statistically influence wheat grain yield and spike population. Howevere, for plant height, the CD1104 genotype has 13.1% bigger plant height on average than that of the CD150 genotype. Inoculation can contribute more sustainably to wheat nutrition.