NITROGEN FERTILIZER AND PLANTING DENSITY EFFECTS ON OUT SEASON ONION YIELD CV. PRIMAVARA (ALLIUM CEPA L.) IN DEZFOUL REGION

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ANSARI N.A.; PIROOZ D.; SIADAT A.A.; HASHEMI DEZFOULI S.A.A.H.

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Journal: Year:2000 | Volume:6 | Issue:1 Page(s): 65-76

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Title

NITROGEN FERTILIZER AND PLANTING DENSITY EFFECTS ON OUT SEASON ONION YIELD CV. PRIMAVARA (ALLIUM CEPA L.) IN DEZFOUL REGION

Author(s)

ANSARI N.A. | PIROOZ D. | SIADAT A.A. | HASHEMI DEZFOULI S.A.A.H. | Issue Writer Certificate

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Abstract

Shortage of onion in market occurs during some winter months. Effects of N fertilizer and planting density in out season production of onion was studied in Dezfoul Agricultural College in 1998-1999. Design of the experiment was split plot and replicated 3 times. Main plots were consisted of 4 levels of N fertilizer (150, 175, 200, 225 kg N ha-1) and subplots were allocated to 4 levels of planting density (40, 55, 70 and 85 plants m-2). Results showed that nitrogen affected bulb diameter and bulbing index which highest values obtained when 200 kg N ha-1 applied. Planting density had a negative linear correlation with diameter and weight of bulbs and no real bulb was formed in highest density. The affect of N on total plant weight and number of bolted plants were not siginificant, howere, total bulb yield and average bulb yield weight were affected by N where highest values obtained when 225 kg N ha-1 applied. Total yield affected positively and increased linearly as planting density increased, but there was a negative relationhip between plant weight and bulb weight with plant density, as the maximum weight of them occurred in low plant density. both of nitrogen and plant density levels had no any effects on plants bolting.The resuls of this experiment indicated that out season production of both onion bulb and scallion in Dezfoul region is possible. Application of 200 kg N ha-1 with density of 40 plants m-2 for bulb production and 150 kg N ha-1 with 85 plants m-2 for scallion production is recommended.

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APA: Copy

ANSARI, N.A., PIROOZ, D., SIADAT, A.A., & HASHEMI DEZFOULI, S.A.A.H.. (2000). NITROGEN FERTILIZER AND PLANTING DENSITY EFFECTS ON OUT SEASON ONION YIELD CV. PRIMAVARA (ALLIUM CEPA L.) IN DEZFOUL REGION. JOURNAL OF AGRICULTURAL SCIENCES, 6(1), 65-76. SID. https://sid.ir/paper/7967/en

Vancouver: Copy

ANSARI N.A., PIROOZ D., SIADAT A.A., HASHEMI DEZFOULI S.A.A.H.. NITROGEN FERTILIZER AND PLANTING DENSITY EFFECTS ON OUT SEASON ONION YIELD CV. PRIMAVARA (ALLIUM CEPA L.) IN DEZFOUL REGION. JOURNAL OF AGRICULTURAL SCIENCES[Internet]. 2000;6(1):65-76. Available from: https://sid.ir/paper/7967/en

IEEE: Copy

N.A. ANSARI, D. PIROOZ, A.A. SIADAT, and S.A.A.H. HASHEMI DEZFOULI, “NITROGEN FERTILIZER AND PLANTING DENSITY EFFECTS ON OUT SEASON ONION YIELD CV. PRIMAVARA (ALLIUM CEPA L.) IN DEZFOUL REGION,” JOURNAL OF AGRICULTURAL SCIENCES, vol. 6, no. 1, pp. 65–76, 2000, [Online]. Available: https://sid.ir/paper/7967/en

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