اﺛﺮ ﺗﺎرﯾﺦ ﮐﺎﺷﺖ و ﺳﻄﻮح ﻧﯿﺘﺮوژن ﺑﺮ ﺑﺮﺧﯽ ﺻﻔﺎت ﮐﯿﻨﻮا

The Effect of Sowing Date and Nitrogen Levels on Some Traits of Quinoa

ﺑﻪ ﻣﻨﻈﻮر ﻣﻄﺎﻟﻌﻪ اﺛﺮ ﺗﺎرﯾﺦ ﮐﺎﺷﺖ و ﺳﻄﻮح ﻧﯿﺘﺮوژن ﺑﺮ ﺑﺮﺧﯽ ﺻﻔﺎت ﮐﯿﻨﻮا، آزﻣﺎﯾﺸﯽ ﺑﻪ ﺻﻮرت ﮐﺮت ﻫﺎي ﺧﺮد ﺷﺪه در ﻗﺎﻟﺐ ﻃﺮح ﭘﺎﯾﻪ ﺑﻠﻮك ﻫﺎي ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ ﺑﺎ ﭼﻬﺎر ﺗﮑﺮار در داﻧﺸﮕﺎه ﻋﻠﻮم ﮐﺸﺎورزي و ﻣﻨﺎﺑﻊ ﻃﺒﯿﻌﯽ ﺧﻮزﺳﺘﺎن در ﺳﺎل 1396 اﺟﺮا ﺷﺪ. ﻋﻮاﻣﻞ آزﻣﺎﯾﺸﯽ ﺷﺎﻣﻞ ﭼﻬﺎر ﺗﺎرﯾﺦ ﮐﺎﺷﺖ )1 و 20 ﻣﻬﺮ و 10 و 30 آﺑﺎن( در ﮐﺮت ﻫﺎي اﺻﻠﯽ و ﭘﻨﺞ ﺳﻄﺢ ﻧﯿﺘﺮوژن ﺻﻔﺮ، 80، 160، 240 و 320 ﮐﯿﻠﻮﮔﺮم در ﻫﮑﺘﺎر( از ﻣﻨﺒﻊ اوره در ﮐﺮت ﻫﺎي ﻓﺮﻋﯽ ﺑﻮدﻧﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ اﺛﺮ ﺗﺎرﯾﺦ ﮐﺸﺖ و ﻧﯿﺘﺮوژن ﺑﺮ ﮐﻠﯿﻪ ﺻﻔﺎت ﻣﻮرد ﺑﺮرﺳﯽ ﺷﺎﻣﻞ ﺗﻌﺪاد ﺑﺮگ، ﺷﺎﺧﺺ ﺳﻄﺢ ﺑﺮگ، ﻋﻤﻠﮑﺮد داﻧﻪ و ﺑﺮداﺷﺖ ﻧﯿﺘﺮوژن ﮐﻞ در ﺳﻄﺢ اﺣﺘﻤﺎل ﯾﮏ درﺻﺪ ﻣﻌﻨﯽ دار ﺑﻮد. ﺑﯿﺸﺘﺮﯾﻦ ﺗﻌﺪاد ﺑﺮگ، ﺷﺎﺧﺺ ﺳﻄﺢ ﺑﺮگ و ﺑﺮداﺷﺖ ﻧﯿﺘﺮوژن ﮐﻞ در ﺗﺎرﯾﺦ ﮐﺎﺷﺖ ﯾﮏ ﻣﻬﺮ و ﻣﺼﺮف 320 ﮐﯿﻠﻮﮔﺮم در ﻫﮑﺘﺎر ﻧﯿﺘﺮوژن و ﺑﯿﺸﺘﺮﯾﻦ ﻋﻤﻠﮑﺮد داﻧﻪ در ﺗﺎرﯾﺦ 20 ﻣﻬﺮ ﺑﺎ ﻣﺼﺮف 320 ﮐﯿﻠﻮﮔﺮم در ﻫﮑﺘﺎر ﻧﯿﺘﺮوژن، ﺑﺪﺳﺖ آﻣﺪ و ﮐﻤﺘﺮﯾﻦ ﻣﯿﺰان ﺻﻔﺎت ﻣﺬﮐﻮر ﻫﻢ در ﺗﺎرﯾﺦ ﮐﺎﺷﺖ 30 آﺑﺎن و ﺑﺪون ﮐﺎرﺑﺮد ﻧﯿﺘﺮوژن ﻣﺸﺎﻫﺪ ﺷﺪ.

To evaluate the effect of sowing date and nitrogen levels on some morphological traits of quinoa, a field experiment was conducted at research farm of Agricultural Sciences and Natural Resources University of Khuzestan, Iran in 2017-2018 growing season. The experiment was conducted in split plot arrangement based on completely randomized block design with four replicates. Experimental factors were four sowing dates (23 Sep., 12 Oct., 1 Nov. and 21 Nov.) in main plots and five nitrogen rates (0, 80, 160, 240 and 320 kg/ha) in sub plots. Results showed that the effect of planting date and nitrogen on all studied traits including leaf number, leaf area index, seed yield and biological yield were significant at 1% probability level. The highest leaf number, leaf area index, seed yield and Total Nitrogen Harvest were obtained at one seal date and 320 kg ha-1 nitrogen application