Effect of different levels of nitrogen and planting density on rapeseed (Brassica napus L. ) and lepyrodiclis (Lepyrodiclis holosteoides Fenzl. ) competition

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Vahidpour Hossein; ZAEFARIAN FAEZEH; NAZARI SHAHRAM; MANSOORI IRANDOKHT

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Journal: Iranian Journal of Field Crop Science Year:2020 | Volume:50 | Issue:4 Page(s): 63-74

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Title

Effect of different levels of nitrogen and planting density on rapeseed (Brassica napus L. ) and lepyrodiclis (Lepyrodiclis holosteoides Fenzl. ) competition

Author(s)

Vahidpour Hossein | ZAEFARIAN FAEZEH | NAZARI SHAHRAM | MANSOORI IRANDOKHT | Issue Writer Certificate

Keywords

Grain yieldQ2

nitrogen agronomic efficiencyQ2

oil percentageQ1

rapeseedQ2

Abstract

To investigate the effect of different lepyrodiclis (Lepyrodiclis holosteoides Fenzl. ) densities on Grain yield reduction, as well as qualitative and nitrogen agronomic efficiency of rapeseed (Brassica napus L. ), a factorial experiment was conducted in a randomized complete block design with three replications in Karaj, 2016-2017. Factors included nitrogen content from urea fertilizer source at four levels (0, 50, 100 and 150 kg N/h, rapeseed densities (70 and 90 plants/m2) and weed density at four levels (0, 5, 10 and 15 plants/m2). The results showed that maximum yield loss at 70 and 90 plant densities of rapeseed/m2 was 26. 54 and 78. 45%, respectively, with 150 and 100 kg nitrogen. The highest percentage of oil and oil yield were 77. 40% and 1504 kg/ha, respectively that were obtained by 90 plants/m2of rapeseed and 150 kgN/ha and no weed. The highest N-agronomic efficiency (89. 19 kg/kg) was obtained by 90 rapeseed plants/m2 and without weed presence. The highest N-partial factor productivity was 36. 24 kg/kg that was observed in 90 plants/m2 rapeseed and 50 kgN/ha. The results of nitrogen interaction and lepyrodiclis density indicated that the highest N-partial factor productivity (87. 23 kg/kg) was observed in the treatment of 50 kg N/ha and absence of weed.

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APA: Copy

Vahidpour, Hossein, ZAEFARIAN, FAEZEH, NAZARI, SHAHRAM, & MANSOORI, IRANDOKHT. (2020). Effect of different levels of nitrogen and planting density on rapeseed (Brassica napus L. ) and lepyrodiclis (Lepyrodiclis holosteoides Fenzl. ) competition. IRANIAN JOURNAL OF FIELD CROP SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), 50(4 ), 63-74. SID. https://sid.ir/paper/374677/en

Vancouver: Copy

Vahidpour Hossein, ZAEFARIAN FAEZEH, NAZARI SHAHRAM, MANSOORI IRANDOKHT. Effect of different levels of nitrogen and planting density on rapeseed (Brassica napus L. ) and lepyrodiclis (Lepyrodiclis holosteoides Fenzl. ) competition. IRANIAN JOURNAL OF FIELD CROP SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)[Internet]. 2020;50(4 ):63-74. Available from: https://sid.ir/paper/374677/en

IEEE: Copy

Hossein Vahidpour, FAEZEH ZAEFARIAN, SHAHRAM NAZARI, and IRANDOKHT MANSOORI, “Effect of different levels of nitrogen and planting density on rapeseed (Brassica napus L. ) and lepyrodiclis (Lepyrodiclis holosteoides Fenzl. ) competition,” IRANIAN JOURNAL OF FIELD CROP SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), vol. 50, no. 4 , pp. 63–74, 2020, [Online]. Available: https://sid.ir/paper/374677/en

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