Impact of eco-physiological factors on the weed seed germination and emergence: A review on its role in weed management Feng Jing1, Yakob Bahran Knfe1,3, Okbagabir Shimendi Gde1,6,*, Dekin Ghebriel Okbatinsae1,5, Mam Erickson Tchuda Lopes1,4, Zargar Meisam1 1Department of Agrobiotechnology, Agrarian Institute Technological, RUDN University, Moscow, Russia 2Shaanxi Normal University, International Joint Research Centre of Shaanxi Province for Food and Health Sciences, Xi'an, People's Republic of China 3Department of Horticulture, Hamelmalo Agricultural College (HAC), Keren, Eritrea 4National Center for Agricultural Research of Guinea-Bissau, Contubel, Guinea-Bissau 5Department of Biology, Mai Nefhi College of Science, Eritrea 6Department of Agronomy, Hamelmalo Agricultural College (HAC), Keren, Eritrea *(e-mail: shimendigde20@gmail.com, pr@rudn.ru)
Online published on 25 December, 2023. Abstract Dormancy is a typical feature of many weed seed populations, which makes forecasting the time and magnitude of weed emergence difficult. The mean minimum temperatures required for undergoing germination of different weed seeds varies considerably depending on the place of their origin as well as the season on which the plants grow. For instance, the temperature requirement for the germination of summer weeds was observed to be 40% higher than for the winter weeds. Decreasing the water potential from 0 Mpa (mega pascal) to -1.0 Mpa tends to reduce the germination capacity of many weed seeds with some seeds totally failing to germinate at -1.0 Mpa (Chloris truncate, Retama raetam). The effects of planting depth on seed germination and seedling growth of Aframomum citratum on varied soil types indicated that sowing depth greatly influenced the plant's cumulative germination percentage and early growth. The seeds of Sysimbrium officinale (L.), a summer annual species, displayed greater sensitivity to nitrates and lost dormancy throughout the winter. The germination of Thlaspi arvense was also discovered to be stimulated by nitrate only in the presence of light. Tilling the surface of soil has a positive impact in the weed seed germination, however if the tillage depth increases more than 9cm, it tends to lower down the germination of several weed species. However, weed seeds of Bernard grass are among the exceptions in which they germinate better at a shallow depth (2cm). The nature and the thickness of the mulching component influence the germination of weed seeds. Thicker mulches and mulching materials like pearl millet resulted in a greater suppression of the weed seed germination due to an increased allelopathic effects. Top Keywords Conservation tillage, Dormancy, Ecological factors, Emergence, Germination, Weed. Top |