ABSTRACT

Corn is a cereal of great economic and social importance worldwide. The objective of the present work was to evaluate the effects on the physiological quality and the performance in the field of corn seeds with different quality standards before and after hydropriming with ozone. To evaluate the effects on the physiological quality, two batches (one with high physiological quality and the other with low physiological quality) of corn seeds were used. Seeds from both batches were immersed in distilled water and bubbled with atmospheric air (control - 0 mg L^-1) or ozone. Three inlet concentrations of ozone (0, 10, and 20 mg L⁻¹) and five periods of preconditioning (0, 30, 60, 90, and 120 min) were used. To evaluate the physiological quality of the seeds, different tests were carried out both in the laboratory and in the field. The use of the corn seed hydropriming with atmospheric air or ozone favored the physiological quality of the corn seeds when considering laboratory and field variables. There was an increase of emergence in the field of seeds not submitted to aging (high physiological quality) only due to the preconditioning period. The use of ozone was positive in lowering the loss of cellular solutes in seeds submitted to aging. Ozonation also caused significant increases in the plant heights and in the first ear insertion height. The binomial 20 mg L⁻¹/60 min is the most suitable for preconditioning corn seeds in ozonated water.

摘要

玉米是一种在世界范围内具有重要经济和社会重要性的谷物。本工作的目的是评估不同质量标准的玉米种子在用臭氧水浸之前和之后对生理质量和田间性能的影响。为了评估对生理质量的影响，使用了两批玉米种子（一批具有高生理质量，另一批具有低生理质量）。将两批种子浸入蒸馏水中，并用大气（对照 - 0 mg L ^-1）或臭氧鼓泡。臭氧的三种入口浓度（0、10 和 20 mg L ^-1) 和五个预处理周期（0、30、60、90 和 120 分钟）。为了评估种子的生理质量，在实验室和田间进行了不同的测试。在考虑实验室和田间变量时，使用大气空气或臭氧对玉米种子进行水力引发有利于玉米种子的生理质量。仅由于预处理期，未经历老化（高生理质量）的种子田中的出苗率有所增加。臭氧的使用在降低老化种子中细胞溶质的损失方面是积极的。臭氧化还导致植物高度和第一个耳朵插入高度的显着增加。二项式 20 mg L ^-1/60 分钟最适合在臭氧水中预处理玉米种子。