Three-lobe morning glory (Ipomoea triloba L.) is an annual weed, which presents vigorous growth, long cycle, and tolerance to glyphosate. Thus, knowledge of aspects related to germination and behavior in the seed bank of this species are essential for the adoption of appropriate management practices to reduce the population in agricultural fields. Therefore, the objective of this work was to characterize the requirements for three-lobe morning glory germination, perform field emergence modeling using thermal and hydrothermal time models, and determine the longevity of the seed bank. Eight temperatures and 10 water potentials were tested in the laboratory to determine the base temperature and water potential for seed germination. For the modeling of the emergence, field experiments were conducted between the years 2014 and 2018 considering three sampling times (10/20, 11/10, and 12/01), which coincide with the sowing times of summer annual crops. To evaluate the longevity and persistence of the seed bank, a factorial experiment was conducted in which factor A consisted of three burial depths and factor B consisted of five harvesting times. Base values for three-lobe morning glory emergence are base, optimum, and maximum temperatures of 12.32, 29.82, and 43.31°C, respectively, and base water potential of −0.80 MPa. Both models are adequate to predict the emergence of three-lobe morning glory in the three sampling times. The species has a persistent seed bank, in which the greater the depth of seed burial, the greater the longevity of the seed bank, and can remain viable for up to 16 months.

中文翻译：

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三叶牵牛花 (Ipomoea triloba L.) 的出苗模型以及种子寿命和土壤持久性的人口统计参数

三叶牵牛花( Ipomoea triloba L.)是一种一年生杂草，生长旺盛，生长周期长，对草甘膦具有耐受性。因此，了解该物种种子库中与发芽和行为相关的方面对于采取适当的管理措施来减少农田中的种群至关重要。因此，这项工作的目的是确定三叶牵牛花发芽的要求，使用热和水热时间模型进行田间出苗建模，并确定种子库的寿命。在实验室测试了8个温度和10个水势，以确定种子发芽的基础温度和水势。为了对出苗进行建模，在 2014 年至 2018 年之间进行了田间实验，考虑了三个采样时间（10/20、11/10 和 12/01），这与夏季一年生作物的播种时间一致。为了评估种子库的寿命和持久性，进行了因子实验，其中因子 A 由三个埋藏深度组成，因子 B 由五个收获时间组成。三瓣牵牛花出苗的底温为12.32℃、29.82℃、43.31℃，底水势为-0.80MPa。两种模型都足以预测三个采样时间内三叶牵牛花的出现情况。该物种拥有持久的种子库，种子埋藏深度越深，种子库的寿命就越长，可保持长达 16 个月的活力。