Odziv listne površine in suhe snovi poljščin, vmesnih posevkov in plevelov na kompeticijo in izrabo gnojil

Fahimeh DADASHI, Faezeh ZAEFARIAN, Rahmat ABBASI, Mohammad Ali BAHMANYAR, Mohammad REZVANI

Povzetek


Sposobnost rastlin za premeščanje listne površine in suhe snovi v zgornje plasti krošnje ima pomebno vlogo v njihovi zgradbi in tekmovalnosti. Za preučevanje vertikalne razporeditve listne površine in suhe snovi v krošnji koruze (Zea mays L.), njenega vmesnega posevka in plevelov v različnih razmerah gnojenja in tekmovalnosti je bil v letu 2012 izveden naključni bločni poskus z osmimi obravnavanji in tremi ponovitvami na Sari Agricultural Sciences and Natural Resources University. Obravnavanja so obsegala koruzo in njen vmesni posevek sojo (Glycine max (L.) Merr.) brez uporabe mineralnih gnojil, koruzo s sojo kot vmesnim posevkom gnojeno s kompostom, koruzo s pšenico (Triticum aesitivum L.) kot vmesnim posevkom brez gnojenja, koruzo s pšenico kot vmesnim posevkom, gnojeno z mineralnimi gnojili, koruzo s pšenico kot vmesnim posevkom gnojeno s kompostom in monokulturo koruze v razmerah z in brez plevelov. Rezultati so pokazali, da so pleveli zmanjšali listno površino in vsebnost suhe snovi pri koruzi. Koruza je premestila več listne površine in suhe snovi v zgornje plasti krošnje v razmerah zapleveljenosti. V razmerah z vmesnimi posevki je koruza premestila več listne površine in suhe snovi v zgornje plasti z vmesnim posevkom sojo kot pa s pšenico. Podobno je soja bolj zmanjšala listno površino in suho snov plevelov kot pšenica. Soja je kot vmesni posevek ob uporabi komposta bolj učinkovito zmanjšala biomaso plevelov kot tudi pridelek koruze.

Ključne besede


koruza; kompost; alokacija suhe snovi; soja; biomasa plevelov; pšenica; vmesni posevek

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2014.103.1.03

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