Perennial soybean seeds coated with high doses of boron and zinc

Pires

et al. 2021

Semina: Ciênc. Agrár.

Boron (B) deficiency is commonly found in tropical crops, among which sorghum stands out for its limited yield under B shortage. However, as a micronutrient, the range between its adequate and toxic levels is narrow, thus fertilization should be cautiously applied. Our goal was to evaluate the physiological and physical quality, as well as early performance, of grain sorghum seedlings under different B doses applied via seeds. Treatments consisted of six doses of boric acid (0.0, 2.5, 5.0, 7.5, 10.0, and 12.5 g Kg-1 seeds) plus a control (uncoated seeds). Boron doses were applied to seeds by coating, in which dolomitic limestone and glue were used for pellet formation. Coated seeds were assessed for physical, physiological, and nutritional characteristics in the laboratory, and early seedling performance was evaluated in a greenhouse. Seed tests were carried out in a fully randomized design, while seedling evaluations were carried out in a randomized block design. Boron application to seeds had no significant effect on seed physical characteristics, despite increases in coated seed sizes. Boron doses had a negative effect on the length and dry mass accumulation of both plant shoot and root. Seed-applied B accumulated mainly in roots and significantly interfered with Ca and Mg accumulations in sorghum seeds, shoots, and roots.

Section: Resultssupporting

confidence: 92%

Physical-physiological quality and early performance of sorghum plants under different boron doses via seed

Batista

Pires

et al. 2021

Semina: Ciênc. Agrár.

“…GroundEye ® was efficient in determining the maximum and minimum diameters of coated Stylosanthes sp. and perennial-soybean seeds in the studies of Acha et al (2016), Silva et al (2017), Acha et al (2018) and Xavier and Vieira (2018). These authors obtained significant increases for those variables with the different coating methodologies Table 3.…”

Section: Resultsmentioning

confidence: 84%

“…In the greenhouse, the seeds achieved an ESI of 1.7% and an emergence percentage 26.5% (intact seeds); and an ESI of 4.1% and 51.5% emergence (scarified seeds). In both environmental conditions, chemical scarification showed to be efficient, breaking the integument dormancy specific to seeds of Neonotonia wightii (Acha et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

“…In terms of seeding uniformity, the increase in seed weight is a positive factor, as it favors precision seeding, allowing the seeds to be used by most mechanical seeders. However, even though the increase in seed weight is an important criterion in the evaluation of coating quality, this criterion should not be evaluated individually, since an increase in seed weight is directly linked to the final cost of the product and to the physiological quality of the seed (Acha et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

“…In coated seeds, the increase in seed size leads to reduced germination and emergence speed because the material deposited on the seed becomes a physical barrier that needs to be overcome (Acha et al, 2016). Thus, in the present study, GroundEye® was efficient in evaluating the quality of the cover through physical evaluations related to the characteristics of the contour and seed size.…”

mentioning

confidence: 86%

See 2 more Smart Citations

Digital image processing of coated perennial-soybean seeds and correlation with physiological atributes

Justino

2020

J. Seed Sci.

Perennial soybean (Neonotonia wightii) is a Fabaceae with potential to be used in consortium with Poaceae plants to improve pasture quality. In order to add value to perennial soybean seeds and improve their seed distribution, seeds coated with different materials in coating machine were characterized by digital image analysis and physical attributes related to physiological attributes in order to define the ideal amount and material to be used in the coating. Different material quantities were tested, 150 g, 200 g and 250 g, divided into layers, namely: sand, calcium silicate + sand and limestone + sand. Coating promoted maximum increments of approximately 350% in seed mass and significant increases of up to 230% in area, 154% in maximum diameter, 162% in minimum diameter, 167% in contained diameter and 152% in perimeter. The coating was also efficient in reducing the moisture of the pellets by increasing the layers that cover the seeds. The sand + limestone combination resulted in the largest pellets. The combination of sand + silicate did not interfere with plant speed and formation. Thus, it was considered the appropriate material for the coating of perennial soybean seeds.

Quality of Stylosanthes Campo Grande seeds coated with different materials

Silva

2021

Rev. Ceres

The seed coating technique adds value to the seeds. This technique allows changing the seed size and shape, facilitating sowing, and also the application of essential nutrients to the good development of the plant in the postgermination phases. Therefore, the objective of this work was to evaluate the physical and physiological characteristics of Stylosanthes capitata/macrocephala coated with different materials. For the coating procedure, a N10 Newpack bench seed coating machine was used. The experimental design was completely randomized, with four replications and 50 seeds per plot distributed in 10 treatments. The different materials and their respective mixtures significantly altered the physical characteristics, the weight of a thousand seeds (WTS), water content (SWC), maximum diameter (DMA), and minimum diameter (DMI) of the seeds. Among the different materials, the sand coated seeds had the highest germination percentage (%G), germination velocity index (GSI), and first germination count (FGC). The maintenance of physiological attributes was observed in sand coated seeds (0.25 mm). Therefore, it is an alternative application of nutrients via seeds, due to the inert character of the sand. The mixing of the materials used in this work is not recommended.