摘要：The biological spectrum of weed phytocoenoses of row crops and small grains in north-western Serbia are analysed.Weed associations in row crops are represented by ass.Cyndono-Sorghetum halepensae (Laban,1974) Kojić 1979,ass.Consolido-Polygonetum aviculare Kojić et al.1973 (Consolida regalis-Polygonum aviculare) and ass.Galeoposi-Calystegietum sepii (Stepić,1984).In all examined associations therophytes have a dominant role.T4 therophytes predominate (63.33%) among the therophytes of the weed association Cyndono-Sorghetum halepensae (Laban,1974) Kojić 1979,while geophyte presence is 27% and hemicryptophyte 15%.In the association Panico-Ambrosietum artemisifoliae ass.nova T4 therophytes are also dominant (35%),and geophytes account for 30% and hemiocryptophytes for 17%.T4 therophytes (25%) and T2 therophytes (20%) predominate among the therophytes of the ass.Consolido-Polygonetum aviculare,while geophyte presence is 29% and hemiocryptophyte 15%.In the ass.Galeopsi-Calystegietum sepii,therophytes are dominant again with T4 therophytes (20%) and T3 therophytes (11%) predominating among them.Geophytes (32%) and hemiocryptophytes (20%) are also present in significant percentages.The analysis of the biological spectrum of weed phytocoenoses of the examined habitats can indicate the appropriate time and method of weed control.
其他摘要：U radu se analiziraju biološki spektri korovskih fitocenoza okopavina i strnih žita severozapadne Srbije.Korovske zajednice okopavina predstavljene su sastojinama ass.Panico-Portulacetum oleraceae Loz.62,ass.Cynodono-Sorghetum halepensae (Laban,1974),Kojić,1979 i sastojinama ass.Panico-Ambrosietum artemisiifoliae ass.nova,a strnih žita sastojinama ass.Consolido-Polygonetum aviculare Kojić et al.1973 (Consolida regalis-Polygonum aviculare) i sastojinama ass.Galeopsi-Calystegietum sepii Stepić,1984.U svim ispitivanim asocijacijama dominantnu ulogu imaju terofite.Među terofitama,u zajednici Cynodono-Sorghetum halepensae (Laban,1974) Kojić 1979,dominiraju T4 sa 63,33%.Geofite su prisutne sa 26%,a hemikriptofite sa 16%.U ass.Panico-Ambrosietum artemisiifoliae ass.nova,takođe dominiraju T4 terofite (35%).Geofite su zastupljene sa 30%,a hemikriptofite sa 17%.Među terofitama u ass.Consolido-Polygonetum aviculare najzastupljenije su T4 (25%) i T2 (20%).Geofite su prisutne sa 29%,a hemikriptofite sa 15%.Takođe,i u ass.Galeopsi-Calystegietum sepii najzastupljenije su terofite,od kojih dominiraju T4 (20%) i T3 (11%).Značajno je i učešće geofita koje su prisutne sa 32% i hemikriptofita sa 20%.Analiza biološkog spektra korovskih fitocenoza ispitivanih staništa može poslužiti kao pokazatelj za izbor vremena i način suzbijanja korova.
关键词：Life forms;Weed phytocoenosis;Row crops;Small grain crops;North-western Serbia
其他关键词：Životni oblici;korovska fitocenoza;okopavine;strna žita;severozapadna Srbija
