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Wzór rozmieszczenia gatunków chwastów w uprawie kukurydzy w Mardan w Pakistanie
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ISBN10: 6208971934
ISBN13: 9786208971939
Publisher: Wydawnictwo Nasza Wiedza
Published: Jun 18 2025
Pages: 68
Weight: 0.23
Height: 0.16 Width: 6.00 Depth: 9.00
Language: Polish
ISBN13: 9786208971939
Publisher: Wydawnictwo Nasza Wiedza
Published: Jun 18 2025
Pages: 68
Weight: 0.23
Height: 0.16 Width: 6.00 Depth: 9.00
Language: Polish
Chwasty to niepożądane gatunki roślin rosnące w uprawach domowych. Podobnie jak inne uprawy, kukurydza również boryka się z problemem konkurencji ze strony chwastów. W malych gospodarstwach rolnych odnotowano poważne straty w plonach kukurydzy sięgające nawet 70% z powodu chwastów. Na sklad i liczebnośc chwastów wplywa szereg zmiennych środowiskowych, a także praktyki rolnicze stosowane w ekosystemie. Niniejsze badanie mialo na celu zmierzenie wplywu zmiennych środowiskowych na sklad gatunkowy, liczebnośc, wzorce rozmieszczenia i tworzenie się różnych zbiorowisk chwastów w dystrykcie Mardan w Pakistanie. Dla każdego pola zmierzono atrybuty fitosocjologiczne, takie jak gęstośc, częstotliwośc, gęstośc względna, częstotliwośc względna i wartości ważności. Dane dotyczące obecności lub braku 29 gatunków i 65 pól zostaly przeanalizowane za pomocą analizy klastrów i analizy dwuklastrowej za pomocą programu PC-ORD w wersji 5, co pozwolilo wyodrębnic cztery glówne zbiorowiska chwastów. Do oceny gradientów środowiskowych chwastów za pomocą kanonicznej analizy korespondencji (CCA) wykorzystano oprogramowanie CANOCO w wersji 4.5. Wyniki wykazaly, że spośród wszystkich zmiennych środowiskowych najsilniejsze byly CaCO3, wysokie stężenie fosforu i wyższa przewodnośc elektryczna.
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