20.500.12556/DiRROS-22709 Importance of environmental factors and crop type on weed diversity associated with cereals in Egypt The research on arable weeds in relation to crops is attributed to the influence of weeds as competitors on crop productivity. It is hypothesised that region, crop type, crop seasonality and soil characteristics are the main factors affecting the diversity and distribution of weeds. In this study, the analysis of weed structure associated with cereals in the different bioclimatic regions of Egypt (Nile Delta, Nile Valley and Western Desert oases) was investigated. Two winter cereals (wheat; barley) and two summer cereals (maize; rice) as main crops were included, and thirteen soil parameters for 261 relevés were used to assess the diversity of weed vegetation. The influence of the explanatory factors on the weed communities was analysed using RDA. A total of 250 species constituted the flora of the studied cereal fields, belonging to 166 genera and 47 families, with therophytes (64.7%) dominating among life forms. One third of the recorded species is of Mediterranean and Saharo-Arabian chorotypes. The variation partitioning of the RDA model between explanatory variables revealed that the effect of bioclimatic regions had the greatest effect on weed composition, followed by crop type, while soil properties had lower effect, and crop seasonality was not significant. V raziskavi plevelov v različnih poljščinah smo ugotavljali vpliv konkurenčnosti plevelov na produktivnost poljščin. Predvidevamo, da na raznolikost in pestrost plevelov najbolj vplivajo območje, tip poljščin, letni čas in značilnosti tal. V članku smo analizirali strukturo plevelnih združb v žitih v različnih bioklimatskih območjih Egipta (delta Nila, dolina Nila in oaze Zahodne puščave). V raziskavo smo v 261 popisih vključili dve ozimni (pšenica in ječmen) in jari žiti (koruza in riž) in trinajst značilnosti tal in preučili raznolikost plevelne vegetacije. Vpliv pojasnjevalnih spremenljivk na plevelne združbe smo analizirali z analizo RDA. V celotni flori preučevanih žitnih polj smo zabeležili 250 vrst iz 166 rodov in 47 družin. Prevladujoča življenska oblika so terofiti (64.7%). Ena tretjina vrst pripada Sredozemskemu in Saharo-Arabskem horotipu. Popolna razvrstitev variabilnosti v RDA modelu med pojasnjevalnimi spremenljivkami je pokazala, da ima na sestavo plevelnih združb največji vpliv bioklimatsko območje, sledi tip poljščine, medtem ko imajo talne značilnosti manjši učinek, letni čas pa ni bil pomemben. agro-ecosystem biogeography Egypt segetal flora vegetation analysis weed infestation kmetijski ekosistem biogeografija Egipt plevelna flora vegetacijska analiza zapleveljenost true false true Angleški jezik Slovenski jezik Imetniki avtorskih pravic na prispevkih so avtorji Neznano 2025-06-18 08:39:08 2025-06-18 08:39:08 2026-02-19 12:11:00 0000-00-00 00:00:00 2025 0 0 str. 41-55 št. 1 letn. 24 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-08-29 551.586:632.51:633(620) 1581-4661 10.3986/hacq-2025-0008 230230275 https://ojs.zrc-sazu.si/hacquetia/article/view/13350 0 ad051640-f90d-11f0-a15d-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=38778 HACQUETIA_24-1_2025_4_Hussein+et+al.pdf HACQUETIA_24-1_2025_4_Hussein+et+al.pdf 1 91793FEE8B7B690CFB3B90F2964DF58E a6e3ff20ab0eafe8801db5b078269eaed0195eb691a8fd30c78633e0e388cb7f b45565a6-f90d-11f0-a15d-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=38779 Znanstvenoraziskovalni center Slovenske akademije znanosti in umetnosti Hacquetia 0 0 0