اﺛﺮ ﺑﺮﻫﻤﮑﻨﺶ ﺧﺎكورزي، آﺑﯿﺎري و ﻣﺪﯾﺮﯾﺖ ﻧﯿﺘﺮوژن ﺑﺮ وزن ﺗﺮ ﻫﺰار داﻧﻪ و ﻋﻤﻠﮑﺮد ﮐﻨﺴﺮوي ﮔﯿﺎه ذرت ﺷﯿﺮﯾﻦ

Interaction Effect of Tillage, Irrigation, and Nitrogen Management on 1000-grain fresh weight and canned yield of Sweet Corn

ﺑﻪﻣﻨﻈﻮر ﺑﺮرﺳﯽ اﺛﺮ ﺑﺮﻫﻤﮑﻨﺶ ﺧﺎكورزي، آﺑﯿﺎري و ﻣﺪﯾﺮﯾﺖ ﻧﯿﺘﺮوژن ﺑﺮ ﻋﻤﻠﮑﺮد ﮐﻨﺴﺮوي و وزن ﺗﺮ ﻫﺰار داﻧﻪ، آزﻣﺎﯾﺸﯽ در دو ﺳﺎل زراﻋﯽ 1395 و 1396 در ﻣﺰرﻋﻪ ﺗﺤﻘﯿﻘﺎﺗﯽ داﻧﺸﮑﺪه ﮐﺸﺎورزي داﻧﺸﮕﺎه ﺷﯿﺮاز )ﻣﻨﻄﻘﻪ ﺑﺎﺟﮕﺎه( ﺑﻪ ﺻﻮرت اﺳﭙﻠﯿﺖ ﻓﺎﮐﺘﻮرﯾﻞ در ﻗﺎﻟﺐ ﻃﺮح ﺑﻠﻮكﻫﺎي ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ ﺑﺎ 3 ﺗﮑﺮار اﻧﺠﺎم ﺷﺪ. ﻋﺎﻣﻞ اﺻﻠﯽ ﺷﺎﻣﻞ ﺧﺎكورزي در دو ﺳﻄﺢ )ﺧﺎكورزي ﻣﺘﺪاول و ﮐﻢ ﺧﺎكورزي(، و ﻣﻨﺎﺑﻊ ﻧﯿﺘﺮوژن در 5 ﺳﻄﺢ )ﺷﺎﻫﺪ، ﻧﯿﺘﺮوﮐﺴﯿﻦ، 150 ﮐﯿﻠﻮﮔﺮم اوره ، 150 ﮐﯿﻠﻮﮔﺮم اوره+ﻧﯿﺘﺮوﮐﺴﯿﻦ و 300 ﮐﯿﻠﻮﮔﺮم اوره( ﺑﻪﻋﻨﻮان ﻓﺎﮐﺘﻮر ﯾﮏ، و ﺗﻨﺶ آﺑﯽ در دو ﺳﻄﺢ )75 و 100 درﺻﺪ ﻧﯿﺎز آﺑﯽ ﮔﯿﺎه( ﺑﻪ ﻋﻨﻮان ﻓﺎﮐﺘﻮر دو در ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﺪ. ﻧﺘﺎﯾﺞ دو ﺳﺎل ﻧﺸﺎن داد ﮐﻪ اﺛﺮ ﻣﺪﯾﺮﯾﺖ ﻧﯿﺘﺮوژن و آﺑﯿﺎري ﺑﺮ وزن ﺗﺮ ﻫﺰار داﻧﻪ ﻣﻌﻨﯽ دار ﺑﻮد. ﺑﯿﺸﺘﺮﯾﻦ ﻣﯿﺰان وزن ﺗﺮ ﻫﺰار داﻧﻪ در ﺑﺮﻫﻤﮑﻨﺶ 300 ﮐﯿﻠﻮﮔﺮم اوره و ﺧﺎكورزي ﻣﺘﺪاول ﺑﻪدﺳﺖ آﻣﺪ، ﮐﻪ ﺗﻔﺎوت ﻣﻌﻨﯽداري ﺑﺎ ﮐﻢ ﺧﺎكورزي ﻧﺪاﺷﺖ. اﺛﺮ ﺧﺎكورزي و ﻣﺪﯾﺮﯾﺖ ﻧﯿﺘﺮوژن ﺑﺮ ﻋﻤﻠﮑﺮد ﮐﻨﺴﺮوي ذرت ﺷﯿﺮﯾﻦ ﻣﻌﻨﯽدار ﺑﻮد. ﮐﺎﻫﺶ ﻣﯿﺰان آب آﺑﯿﺎري از 100 درﺻﺪ ﻧﯿﺎز آﺑﯽ ﺑﻪ 75 درﺻﺪ، ﺑﺎﻋﺚ ﮐﺎﻫﺶ ﻣﻌﻨﯽ داري در ﻋﻤﻠﮑﺮد ﮐﻨﺴﺮوي داﻧﻪ ﻧﺸﺪ، اﻣﺎ ﻣﯽﺗﻮاﻧﺪ ﻣﻮﺟﺐ ﺻﺮﻓﻪ ﺟﻮﯾﯽ ﻗﺎﺑﻞ ﻣﻼﺣﻈﻪاي در ﻣﺼﺮف آب ﻣﻮرد ﻧﯿﺎز آﺑﯿﺎري ﮔﺮدد.

In order to evaluate the interaction effect of tillage, irrigation, and nitrogen management on canned yield and 1000-grain fresh weight of sweet corn, a 2-Year field study was conducted in 2016-2017 at the School of Agriculture Farm, Shiraz University. The experimental design was split-factorial arranged in a randomized complete block design with three replications. The treatments were tillage (reduced and conventional tillage) as main factor, N rates [0 (control), nitroxin usage (4 lit ha-1), 150 kg N ha-1 (as urea), nitroxin usage + 150 kg N ha-1, and 300 kg N ha-1] and irrigation regimes, [fully irrigation (100%) and 75% plant water requirement (Kc)] as factors. 2-Year result indicated that the effect of irrigation and nitrogen management was significant on 1000-grain fresh weight. Maximum 1000-grain fresh weight was achieved by 300 kg N ha-1 and conventional tillage, but there was no significant different between conventional and reduced tillage. Effect of tillage and nitrogen management was significant on Sweet Corn canned yield. Reducing irrigation water amount from 100% to 75% water requirement did not significantly reduce the canned yield, but it can save significant amounts of water used for irrigation.