Physiological attributes of Enlist E3™ soybean seed submitted to herbicides application

Abstract Background: Enlist E3™ soybean is tolerant to 2,4-D, glyphosate and ammonium-glufosinate and were developed for effective management of herbicide resistant weeds such as glyphosate Herbicides, even being selective, can cause damage to crop metabolism, affect growth and development and interfere with seed physiological quality. Objective: The aim of this research was to evaluate the physiological quality of Enlist E3™ soybean seeds submitted to herbicide application. Methods: The field trial was carried out in a randomized block design with four replications. The treatments tested were 2,4-D choline + glyphosate, 2,4-D choline, glyphosate + 2,4-D amine and ammonium-glufosinate; and control without application, sprayed at V6 soybean growth stage. After harvest, the seeds were submitted to first germination count, accelerated aging, germination speed index, shoot and root length, shoot and root dry mass and electrical conductivity tests. Results: The management of Enlist E3 soybeans with Enlist herbicides (2,4-D choline + glyphosate and 2,4-D choline) as well as glyphosate + 2,4-D amine and glufosinate did not negatively impact soybean parameters such as: vigor, germination count, accelerated aging, germination speed, aerial part and primary root length, aerial part and root dry mass and electrical conductivity. Conclusions: Those herbicides can be recommended to be used on post emergence (V6) of Enlist E3 soybean.

摘要 背景：Enlist E3™大豆（Enlist E3™ Soybean）对2,4-D、草甘膦（glyphosate）及草铵膦铵盐（ammonium-glufosinate）具有耐受性，其研发初衷为高效防控抗除草剂杂草（如抗草甘膦杂草）。尽管除草剂具备选择性，但仍可能对作物代谢造成损伤，影响其生长发育，并干扰种子的生理品质。
研究目的：本研究旨在评估经除草剂喷施处理后的Enlist E3™大豆种子的生理品质。
试验方法：本田间试验采用随机区组设计，设置4次重复。供试处理包括：2,4-滴胆碱+草甘膦、2,4-滴胆碱、草甘膦+2,4-滴胺盐以及草铵膦铵盐，另设不施药的空白对照组；施药时期为大豆V6生育期。种子收获后，依次开展首次发芽计数、加速老化试验、发芽速率指数测定、地上部与根长测定、地上部及根部干质量测定，以及电导率测定。
试验结果：使用Enlist系列除草剂（2,4-滴胆碱+草甘膦、2,4-滴胆碱）、草甘膦+2,4-滴胺盐及草铵膦处理Enlist E3™大豆，未对以下大豆相关参数产生负面影响：种子活力、首次发芽计数、加速老化试验结果、发芽速率、地上部与根长、地上部及根部干质量，以及电导率指标。
研究结论：综上，上述除草剂可推荐用于Enlist E3™大豆的苗后（V6生育期）喷施作业。