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Carlos Eduardo da Silva Oliveira,Tiago Zoz,Eduardo Pradi Vendruscolo,Agner de Freitas Andrade,Cássio de Castro Seron,Travis Wilson Witt 한국작물학회 2020 Journal of crop science and biotechnology Vol.23 No.5
The sowing operation is crucial for the proper initial establishment of seedlings and their development. However, there is a lack of studies about the eff ects of sowing depth of rice, as well as technologies that aid to mitigate the prejudicial eff ects caused by depth. In this way, the present work aimed to evaluate the initial growth of rice plants inoculated with Azospirillum brasiliense and treated with biostimulant sowed at diff erent depths. Randomized complete block design with four replica�tions was used, in a 4 × 4 factorial scheme. The fi rst factor was composed of diff erent seed treatments (a, control—with�out treatment; b, inoculation with A. brasilense ; c, seed treatment with Stimulate® and d, inoculation with A. brasilense associated with seed treatment with Stimulate ® ). The second factor was composed of four sowing depths (1.0, 3.0, 5.0 and 7.0 cm). Treatment of rice seeds with A. brasilense and Stimulate® decreases the rate of emergence. The sowing at 7 cm depth decreases in 41.44% of the emergence, when compared to sowing at 1 cm. Inoculation with A. brasilense and sowing at increasing depths are prejudicial to the growth of rice crop.
Nutrition and yield of hydroponic arugula under inoculation of beneficial microorganisms
Gato Isabela Martins Bueno,da Silva Oliveira Carlos Eduardo,Oliveira Thaissa Julyanne Soares Sena,Jalal Arshad,de Almeida Moreira Vitória,Giolo Victoria Moraes,Vitória Letícia Schenaide,de Lima Bruno 한국원예학회 2023 Horticulture, Environment, and Biotechnology Vol.64 No.2
The use of benefi cial fungi and bacteria can improve growth, yield and food quality of plants. The electrical conductivity (EC) of a nutrient solution is closely linked to better nutrition of arugula plants in a hydroponic system. Therefore, objectives of current study were to evaluate isolated and combined eff ect of inoculation with Azospirillum brasilense and Trichoderma hazianum under two ECs on root-shoot biomass, nutrition and yield of arugula in hydroponic cultivation system. The experi- ment was designed in a strip-plot block with fi ve replications in a 4 × 2 factorial scheme. The treatments were consisted of four microbial inoculations (without, A. brasilense, T. harzianum and co-inoculation of both) and two ECs (1.4 and 1.6 dS m −1). The higher EC with A. brasilense inoculation provided greater growth of arugula plants in a hydroponic system. Inoculation with A. brasilense has increased leaf area, shoot–root length, leaf chlorophyll index (LCI) and shoot ammonium accumulation while reduced root-shoot nitrate accumulation. The leaf nutrition or biofortifi cation of arugula plants with K, S, Ca, Mg, Zn, Fe, and Mn was improved under both isolated and combined inoculations of A. brasilense and T. harzianum .
Thurow Liamara Bahr,da Silva Raíssa Martins,Venske Eduardo,Ceolin Guilherme Paim,de Oliveira Victoria Freitas,Stülp Cristiano,Figueiredo Ricardo Garcia,Tessmann Elisane Weber,da Maia Luciano Carlos,de 한국작물학회 2024 Journal of crop science and biotechnology Vol.27 No.2
Although genomic tools have proven to be very useful for plant breeding, most bread wheat breeding programs at developing countries still rely solely on phenotypic selection. Controversially, applied studies on this theme are gradually becoming scarce worldwide, especially the ones focusing on specifc traits, such as plant height and spike number. The present study aimed to depict the genetic efects of selecting for both decrease and increase of plant height and spike number on a set of Brazilian wheat populations at early segregating generations, bringing information for the development of efective breeding strategies. Five populations in F2 were subjected to fve selection criteria, including no selection. Eight agronomic traits were assayed. Plant height has shown the highest broad-sense heritability coefcients, selection diferentials, selection gain estimates, and real selection gains. On the other hand, the means for spike number for these parameters were low to moderate. Selection for these traits impacted on indirect selection gains for all other traits. Early selection for increasing both plant height and spike number per plant has positive efects on grain yield per plant and its components on the segregating populations assayed, according to selection gain estimates. The present germplasm does not allow for further plant shortening without losing yield potentia
Nitrogen supply associated with rhizobacteria in the first productive cycle of Marandu grass
Fernando Antônio Rebouças Sampaio,Marcelo Carvalho Minhoto Teixeira Filho,Carlos Eduardo da Silva Oliveira,Arshad Jalal,Eduardo Henrique Marcandalli Boleta,Bruno Horschut de Lima,Poliana Aparecida Leo 한국작물학회 2021 Journal of crop science and biotechnology Vol.24 No.4
The rhizobacteria of genus Azospirillum and Bacillus are efective at fxing atmospheric nitrogen, promote plant growth and can largely contribute to benefcial recovery from degraded pastures. This study aimed to evaluate the development and nutritional status of Urochloa brizantha cv. Marandu in response to nitrogen doses along with inoculation of Azospirillum brasilense and Bacillus subtilis. The experiment was carried in a completely randomized design in a greenhouse with four replications and in factorial scheme 4×5. The treatments were consisted of seeds inoculation (without inoculation, A. brasilense (strains Ab-V5, Ab-V6), B. subtilis (strain CCTB04) and co-inoculation with strains of A. brasilense+strain of B. subtilis, and nitrogen doses (0, 50, 100, 150 and 200 kg ha−1, equivalent to 0, 25, 50, 75 and 100 mg dm−3 N) from urea. The sole inoculation of A. brasilense and B. subitilis promoted plant height of Marandu grass along with nitrogen fertilization. The co-inoculation of these bacteria increased potassium accumulation in Marandu grass along with nitrogen doses. Regardless of bacterial inoculation, number of tillers, leaves, dry matter accumulation, crude protein and accumulations of N, P, Ca, S and Mg were increased with increasing nitrogen doses in the frst forage cycle.