بررسی پاسخ های فیزیولوژیکی ذرت شیرین شامل میزان و زنده مانی دانه گرده ، میزان فتوسنتز و هدایت روزنه ای نسبت به تنش آبیاری و میزان ازت مصرفی
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عنوان دوره: سیزدهمین کنگره زراعت و اصلاح نباتات ایران
نویسندگان
1دﻛﺘﺮی و ﻋﻀﻮﻫﻴﺎت ﻋﻠﻤﻲ ﻣﺮﻛﺰﺗﺤﻘﻴﻘﺎت ﻛﺸﺎورزی وﻣﻨﺎﺑﻊ ﻃﺒﻴﻌﻲ ﻫﺮﻣﺰﮔﺎن
2داﻧﺸﺠﻮی دﻛﺘﺮی زراﻋﺖ داﻧﺸﻜﺪه ﻛﺸﺎورزی داﻧﺸﮕﺎه UPM ﻣﺎﻟﺰی
3ﻛﺎرﺷﻨﺎس ارﺷﺪ ﺑﺎﻏﺒﺎﻧﻲ
4ﻓﻮق ﻟﻴﺴﺎﻧﺲ و ﻋﻀﻮ ﻫﻴﺎت ﻋﻠﻤﻲ ﻣﺰﻛﺰ ﺗﺤﻘﻴﻘﺎت ﻛﺸﺎورزی و ﻣﻨﺎﺑﻊ ﻃﺒﻴﻌﻲ ﻫﺮﻣﺰﮔﺎن
چکیده
ﻛﻤﺒﻮد آب ﻳﻜﻲ از ﻋﻮاﻣﻞ ﻣﻬﻢ ﻣﺤﺪود ﻛﻨﻨﺪه ﺗﻮﻟﻴﺪ ﻣﺤﺼﻮﻻت در ﻣﻨﺎﻃﻖ ﺧﺸﻚ و ﻧﻴﻤﻪ ﺧﺸﻚ ﻣﻲ ﺑﺎﺷﺪ. اﻳﻦ ﭘﮋوﻫﺶ ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﻲ اﺛﺮﻣﺘﻘﺎﺑﻞ ﺗﻨﺶ آﺑﻴﺎری و ﻣﻴﺰان ازت ﻣﺼﺮﻓﻲ ﺑﺮﻣﻴﺰان ﺗﻮﻟﻴﺪ داﻧﻪ ﮔﺮده و زﻧﺪه ﻣﺎﻧﻲ آن و ﻫﻤﭽﻨﻴﻦ ﻣﻴﺰان ﻓﺘﻮﺳﻨﺘﺰ و ﻫﺪاﻳﺖ روزﻧﻪ ای در دو ﻫﻴﺒﺮﻳﺪ ذرت ﺷﻴﺮﻳﻦ 968 و 926 در ﺷﺮاﻳﻂ ﮔﻠﺨﺎﻧﻪ ای ﺑﻪ ﺻﻮرت اﺳﭙﻠﻴﺖ ﭘﻼت ﻓﺎﻛﺘﻮرﻳﻞ در ﻗﺎﻟﺐ ﻃﺮح ﺑﻠﻮک ﻫﺎی ﻛﺎﻣﻞ ﺗﺼﺎدﻓﻲ ﺑﺎ ﺳﻪ ﺗﻜﺮار ، در ﺳﺎل 2010 و در ﻣﺰرﻋﻪ ﺗﺤﻘﻴﻘﺎﺗﻲ داﻧﺸﻜﺪه ﻛﺸﺎورزی داﻧﺸﮕﺎه ﭘﻮﺗﺮا (UPM) ﻣﺎﻟﺰی اﺟﺮا ﺷﺪ. دراﻳﻦ ﻃﺮح ﺗﻴﻤﺎرﻫﺎ ﺷﺎﻣﻞ ﭼﻬﺎر ﺳﻄﺢ آﺑﻴﺎری ) ﺷﺎﻣﻞ آﺑﻴﺎری ﻛﺎﻣﻞ در ﻃﻮل دوره رﺷﺪ )ﺷﺎﻫﺪ(، ﺗﻨﺶ رﻃﻮﺑﺘﻲ در ﻣﺮﺣﻠﻪ رﺷﺪ ﺳﺒﺰﻳﻨﻪ ای، ﺗﻨﺶ رﻃﻮﺑﺘﻲ در ﻣﺮﺣﻠﻪ رﺷﺪ زاﻳﺸﻲ و ﺗﻨﺶ رﻃﻮﺑﺘﻲ در ﻣﺮﺣﻠﻪ رﺷﺪ ﺳﺒﺰﻳﻨﻪ ای و زاﻳﺸﻲ(، ﺳﻪ ﺳﻄﺢ ﻛﻮد ﻧﻴﺘﺮوژن دار اوره )40، 120 و 200 ﻛﻴﻠﻮ ﮔﺮم در ﻫﻜﺘﺎر( و دو رﻗﻢ وارﻳﺘﻪ ﻫﻴﺒﺮﻳﺪ ﺷﺎﻣﻞ ﻫﻴﺒﺮﻳﺪ 968 و ﻫﻴﺒﺮﻳﺪ 926 ﺑﻮدﻧﺪ. ﺗﺠﺰﻳﻪ و ﺗﺤﻠﻴﻞ داده ﻫﺎ ﻧﺸﺎن داد ﻛﻪ اﺛﺮ ﻣﺘﻘﺎﺑﻞ ﺗﻨﺶ آﺑﻴﺎری و ﻛﻮد ﻧﻴﺘﺮوژن ﺑﺮ ﻣﻴﺰان ﻓﺘﻮﺳﻨﺘﺰ، ﻫﺪاﻳﺖ روزﻧﻪ ای ﻣﻌﻨﻲ دار ﺑﻮد و ﺑﺎ ﻛﺎﻫﺶ ﻣﻴﺰان ﻣﺼﺮف ازت و ﺗﻨﺶ آﺑﻴﺎری اﻳﻦ ﻣﻘﺎدﻳﺮ ﻛﺎﻫﺶ ﻳﺎﻓﺖ. ﻣﻴﺰان داﻧﻪ ﮔﺮده ﻧﻴﺰ ﺑﺎ ﻛﺎﻫﺶ ﻣﺼﺮف ازت و ﺗﻨﺶ آﺑﻴﺎری ﻛﺎﻫﺶ ﻳﺎﻓﺖ اﻣﺎ ﻛﺎﻫﺶ ازت در ﻣﻴﺰان زﻧﺪه ﻣﺎﻧﻲ داﻧﻪ ﮔﺮده ﺗﺎﺛﻴﺮی ﻧﺪاﺷﺖ و زﻧﺪه ﻣﺎﻧﻲ داﻧﻪ ﮔﺮده ﻓﻘﻂ ﺑﺎ ﺗﻨﺶ آﺑﻴﺎری ﻛﺎﻫﺶ ﻳﺎﻓﺖ.
کلیدواژه ها
Title
Physiological responses of sweet corn include Pollen number and viability, photosynthetic rate and stomata conductance under water deficit and nitrogen rates
Authors
Abstract
Abstract:
Water deficit is one of the main factors limiting production in arid and semiarid regions. This study investigated were carried out in the interaction of water deficit and N fertilizer rate on pollen number and pollen viability, photosynthesis rate and stomata conductance parameters in greenhouse condition. The experimental layout was split plot factorial design arranged in a randomized complete block design with three replications in 2010 in the Agriculture crop science, Putra University Malaysia (UPM).Treatments consisted of four levels of irrigation (including irrigation all of the growing season (control), vegetative drought, reproductive drought and vegetative and reproductive drought), three levels of nitrogen as urea (40, 120 and 200 kg ha-1) and two varieties of sweet corn varieties (including hybrids 968 and 926), respectively. Results showed that the interaction effects of water deficit and nitrogen fertilizer were significant and reduced photosynthetic rate and stomata conductance under water and Nitrogen rates deficit. Pollen number reduced with water and nitrogen deficit. Nitrogen rate deficit did not effect on Pollen viability and pollen viability reduced only under water deficit.
Water deficit is one of the main factors limiting production in arid and semiarid regions. This study investigated were carried out in the interaction of water deficit and N fertilizer rate on pollen number and pollen viability, photosynthesis rate and stomata conductance parameters in greenhouse condition. The experimental layout was split plot factorial design arranged in a randomized complete block design with three replications in 2010 in the Agriculture crop science, Putra University Malaysia (UPM).Treatments consisted of four levels of irrigation (including irrigation all of the growing season (control), vegetative drought, reproductive drought and vegetative and reproductive drought), three levels of nitrogen as urea (40, 120 and 200 kg ha-1) and two varieties of sweet corn varieties (including hybrids 968 and 926), respectively. Results showed that the interaction effects of water deficit and nitrogen fertilizer were significant and reduced photosynthetic rate and stomata conductance under water and Nitrogen rates deficit. Pollen number reduced with water and nitrogen deficit. Nitrogen rate deficit did not effect on Pollen viability and pollen viability reduced only under water deficit.
Keywords
Nitrogen deficit, Photosynthesis rate, Stomata conductance. Water stress