Quality of Stylosanthes Campo Grande seeds coated with different materials

ABSTRACT 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 post-germination 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.

摘要：种子包衣技术可提升种子附加值。该技术可改变种子尺寸与形状，便于播种，同时可为植物发芽后阶段的良好生长施加必需营养物质。为此，本研究旨在评估经不同材料包衣的柱花草（Stylosanthes capitata/macrocephala）的物理与生理特性。本试验采用N10 Newpack型台式种子包衣机完成包衣操作。实验设计为完全随机设计，设置4次重复，每个小区种植50粒种子，共设10个处理组。不同材料及其相应混合物可显著改变种子的物理特性、千粒重（WTS）、种子含水量（SWC）、最大直径（DMA）与最小直径（DMI）。在所有供试材料中，经沙子包衣的种子拥有最高的发芽率（%G）、发芽速度指数（GSI）与初次发芽计数（FGC）。经0.25 mm沙子包衣的种子可维持其生理属性。鉴于沙子的惰性特性，通过种子施加营养物质是一种可行途径。本研究中所使用的材料混合方案不建议采用。