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Modello di distribuzione delle specie infestanti nelle coltivazioni di mais a Mardan, Pakistan
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ISBN10: 6208971926
ISBN13: 9786208971922
Publisher: Edizioni Sapienza
Published: Jun 18 2025
Pages: 68
Weight: 0.23
Height: 0.16 Width: 6.00 Depth: 9.00
Language: Italian
ISBN13: 9786208971922
Publisher: Edizioni Sapienza
Published: Jun 18 2025
Pages: 68
Weight: 0.23
Height: 0.16 Width: 6.00 Depth: 9.00
Language: Italian
Le infestanti sono specie vegetali indesiderate che crescono nelle colture domestiche. Come altre colture, anche il mais deve affrontare il problema della competizione con le infestanti. A causa delle infestanti, nelle piccole aziende agricole sono state segnalate perdite di resa fino al 70% del mais. La composizione e l'abbondanza delle infestanti sono influenzate da una serie di variabili ambientali e dalle pratiche agricole in un ecosistema. Il presente studio è stato formulato per misurare l'effetto delle variabili ambientali sulla composizione delle specie di erbacce, l'abbondanza, il modello di distribuzione e la formazione di varie comunità di erbacce nel distretto di Mardan, in Pakistan. Per ogni campo sono stati misurati attributi fitosociologici quali densità , frequenza, densità relativa, frequenza relativa e valori di importanza. I dati di presenza/assenza di 29 specie e 65 campi sono stati analizzati utilizzando analisi cluster e cluster a due vie tramite PC-ORD versione 5, che ha portato all'identificazione di quattro principali comunità di erbacce. Il software CANOCO versione 4.5 è stato utilizzato per valutare i gradienti ambientali delle infestanti attraverso analisi di corrispondenza canonica (CCA). I risultati hanno mostrato che tra tutte le variabili ambientali le più significative erano CaCO3, alta concentrazione di fosforo e maggiore conduttività elettrica.
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