Effect of nitrogen fertilizer source on yield and essential oil content of sweet basil (Ocimum basilicum L.) and forage maize (Zea mays L.) yield in intercropping
Message:
Abstract:

To evaluate the effect of nitrogen sources on yield and quality of sweet basil and forage maize under intercropping (additive series), a field experiment was carried out at the experimental field of faculty of agriculture, Lorestan University, Khorramabad, Iran, in 2013-2014 and 2014-2015 growing seasons. Experimental treatments were arranged as factorial in randomized complete block design with three replications. Experimental treatments included: without fertilizer (Control), 100% chemical fertilizer (N), bio-fertilizer (Nitroxin), integration of bio-fertilizer + 50% chemical fertilizer, and cropping patterns consisted of; sole cropping sweet basil and forage maize and the additive intercropping of maize + 25% sweet basil, maize + 50% sweet basil, maize + 75% sweet basil and maize + 100% sweet basil. Mean comparisons showed that in the second year sole cropping of sweet basil with 100% chemical fertilizer in second harvest had the highest total dry weight (3921.9 kg.ha-1). Among cropping systems the highest total dry weight (19220 kg.ha-1) was obtained from sole cropping of forage maize. Application of the integration of Nitroxin + 50% nitrogen chemical fertilizer in intercropping produced reasonable biological yield and essential oil yield, and did not show a remarkable difference with nitrogen chemical fertilizer. The highest LER (1.566) belonged to maize + 100% sweet basil with bio-fertilizer. The results showed that using the integration of bio-fertilizer + 50% chemical fertilizer can be considered as an enviromnet-friendly approach to reduce the consumption of chemical fertilizers in support of sustainable agriculture.

Article Type:
Research/Original Article
Language:
Persian
Published:
Iranian Journal of Crop Sciences, Volume:21 Issue:3, 2019
Pages:
287 - 310
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