اثر غلظت‌هاي مختلف نيتروژن و تركيب بستر كشت بر برخي شاخص‌هاي رشدي گياه بنت‌‌‌ قنسول رقم نوئل رد

The Effect of Different Concentrations of Nitrogen and Potting Media Composition on Some Growth Characteristics of Poinsettia (Euphorbia pulcherrima) cv. Noel Red

ﻣﺪﯾﺮﯾﺖ ﻣﺎدهﻫﺎي ﻏﺬاﯾﯽ و ﻣﺤﯿﻂ ﮐﺸﺖ رﯾﺸﻪ از ﻣﻬﻤﺘﺮﯾﻦ ﻋﻮاﻣﻞ ﻣﺤﯿﻄﯽ ﻣﻮﺛﺮ در رﺷﺪ ﮔﯿﺎﻫﺎن ﻣﯽﺑﺎﺷﺪ. ﭘﮋوﻫﺶ ﺣﺎﺿﺮ ﺑﺎ ﻫﺪف ﺑﺮرﺳﯽ اﺛﺮ ﻏﻠﻈﺖﻫﺎي ﻣﺨﺘﻠﻒ ﻧﯿﺘﺮوژن )280 ،230 ،180 و330 ﻣﯿﻠﯽﮔﺮم در ﻟﯿﺘﺮ( و ﺗﺮﮐﯿﺐ ﺑﺴﺘﺮﻫﺎي ﮐﺸﺖ ﺷﺎﻣﻞ ﻧﺴﺒﺖﻫﺎي ﺣﺠﻤﯽ ﻣﺸﺨﺺ از ﭘﯿﺖ ﻣﺎس )2( + ﭘﺮﻻﯾﺖ )1( و ﮐﻮﮐﻮﭘﯿﺖ )2( + ﭘﺮﻻﯾﺖ )1( ﺑﺮ ﺑﺮﺧﯽ ﺷﺎﺧﺺﻫﺎي ﻣﻮرﻓﻮﻟﻮژﯾﮏ و ﻓﯿﺰﯾﻮﻟﻮژﯾﮏ ﮔﯿﺎه ﺑﻨﺖ ﻗﻨﺴﻮل رﻗﻢ ﻧﻮﺋﻞ رد ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮار ﮔﺮﻓﺖ. اﯾﻦ آزﻣﺎﯾﺶ ﺑﻪﺻﻮرت ﻓﺎﮐﺘﻮرﯾﻞ در ﻗﺎﻟﺐ ﻃﺮح ﺑﻪﻃﻮرﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ ﺑﺎ 3 ﺗﮑﺮار اﺟﺮا ﮔﺮدﯾﺪ. ﻧﺘﯿﺠﻪﻫﺎ ﻧﺸﺎن دادﻧﺪ ﮐﻪ ﻏﻠﻈﺖ 230 ﻣﯿﻠﯽﮔﺮم در ﻟﯿﺘﺮ ﻧﯿﺘﺮوژن و ﺑﺴﺘﺮ ﮐﻮﮐﻮﭘﯿﺖ + ﭘﺮﻻﯾﺖ ﺑﺎﻋﺚ اﻓﺰاﯾﺶ ﻣﯿﺰان ارﺗﻔﺎع، ﻗﻄﺮ ﺗﺎج ﺑﻮﺗﻪ، ﭘﺮوﺗﺌﯿﻦ و ﻣﯿﺰان ﻧﯿﺘﺮوژن ﺑﺎﻓﺖ ﺑﺮﮔﯽ ﺷﺪ. ﻏﻠﻈﺖ 230 ﻣﯿﻠﯽﮔﺮم در ﻟﯿﺘﺮ ﻧﯿﺘﺮوژن ﻫﻤﭽﻨﯿﻦ ﺳﺒﺐ اﻓﺰاﯾﺶ ﺳﻄﺢ ﺑﺮگ )ﺑﻪ ﻣﯿﺰان 1237/1 ﺳﺎﻧﺘﯽﻣﺘﺮ ﻣﺮﺑﻊ( و ﺑﺮﮔﮏ )ﺑﻪ ﻣﯿﺰان 2226/3 ﺳﺎﻧﺘﯽﻣﺘﺮ ﻣﺮﺑﻊ( ﻧﺴﺒﺖ ﺑﻪ ﺳﺎﯾﺮ ﺗﯿﻤﺎرﻫﺎ ﺷﺪ. ﻏﻠﻈﺖ 280 ﻣﯿﻠﯽﮔﺮم در ﻟﯿﺘﺮ ﻧﯿﺘﺮوژن و ﮐﻮﮐﻮﭘﯿﺖ + ﭘﺮﻻﯾﺖ ﺑﺎﻋﺚ ﺑﯿﺸﺘﺮﯾﻦ ﻣﯿﺰان ﻣﻨﯿﺰﯾﻢ )0/88 درﺻﺪ( ﺑﺎﻓﺖ ﮔﯿﺎﻫﯽ ﺷﺪ. ﺑﻪﻃﻮر ﮐﻠﯽ ﻧﺘﯿﺠﻪﻫﺎي ﭘﮋوﻫﺶ ﺣﺎﺿﺮ ﻧﺸﺎن داد ﮐﻪ ﻏﻠﻈﺖ 230 و 280 ﻣﯿﻠﯽﮔﺮم ﺑﺮ ﻟﯿﺘﺮ ﻧﯿﺘﺮوژن و ﺑﺴﺘﺮ ﺗﺮﮐﯿﺒﯽ ﮐﻮﮐﻮﭘﯿﺖ و ﭘﺮﻻﯾﺖ ﻣﻮﺟﺐ ﺑﻬﺒﻮد ﺷﺎﺧﺺﻫﺎي رﺷﺪي و وﯾﮋﮔﯽﻫﺎي ﮐﯿﻔﯽ ﺑﻨﺖ ﻗﻨﺴﻮل ﺷﺪ.ت.

To investigating the effects of various concentrations of nitrogen (180, 230, 280 and 330 mg L-1) and potting media composition (peat moss:perlite or cocopeat:perlite as 2:1 V/V) on some growth traits of Euphorbia pulcherrima, a factorial experiment was conducted based on a completely randomized design with 8 treatments and 3 replications. The results showed that the highest height, plant canopy diameter and protein content eamed by using of were observed in plants grown at the concentration of 230 mg L-1 N in cocopeat and perlite media. The concentration of 230 mg L-1 N increased the bract and leaf area in comparison with the other treatments. The concentration of 280 mg L-1 of nitrogen with cocopeat and perlite media caused the maximum amount of the Mg content in plant leaves tissue. Using of peat mass and perlite and 330 mg L-1 of nitrogen resulted in the highest bract anthocyanin and potassium content. Generally, the results of the study showed that the concentrations of 230 and 280 mg L-1 nitrogen and the combination of cocopeat and perlite as a media improved the growth indices and qualitative characteristics of Poinsettia