اﺛﺮ زﻣﺎن و ﺷﯿﻮه ﮐﺎﺷﺖ ﺑﺮ رﺷﺪ و ﻋﻤﻠﮑﺮد ﺳﻪ رﻗﻢ ذرت ﻋﻠﻮﻓﻪاي Zea mays L در ﮐﺸﺖ دوم

Effect of planting time and planting method on growth and yield of three forage corn cultivars at second crop

ﺑﻪ ﻣﻨﻈﻮر ﺑﺮرﺳﯽ اﺛﺮ زﻣﺎن و ﺷﯿﻮه ﮐﺎﺷﺖ ﺑﺮ رﺷﺪ و ﻋﻤﻠﮑﺮد ﺳﻪ رﻗﻢ ذرت ﻋﻠﻮﻓﻪاي در ﮐﺸﺖ دوم در ﺳﺎل زراﻋﯽ 1397 آزﻣﺎﯾﺸﯽ ﺑﻪ ﺻﻮرت ﻓﺎﮐﺘﻮرﯾﻞ در ﻗﺎﻟﺐ ﻃﺮح ﺑﻠﻮكﻫﺎي ﮐﺎﻣﻞ ﺗﺼﺎدﻓﯽ در ﺳﻪ ﺗﮑﺮار ﺑﻪ ﻣﺮﺣﻠﻪ اﺟﺮا ﮔﺬارده ﺷ.ﺪ ﻋﻮاﻣﻞ ﻣﻮرد ﻣﻄﺎﻟﻌﻪ ﺷﺎﻣﻞ ﭼﻬﺎر زﻣﺎن ﮐﺎﺷﺖ ﺷﺎﻣﻞ 15و 27 ﻣﺮدادﻣﺎه، 8و 20 ﺷﻬﺮﯾﻮرﻣﺎه، دو روش ﮐﺸﺖ 1- ﻣﺴﺘﻘﯿﻢ و 2- ﻧﺸﺎﯾﯽ و ﺳﻪ رﻗﻢ ذرت ﺷﺎﻣﻞ ﻓﺠﺮ 260، ﮐﺮج 201 )ﮐﻮﺷﺎ( و ﮐﺮج 410 )ﻃﺎﻫﺎ( در ﻧﻈﺮ ﮔﺮﻓﺘﻪ ﺷﺪﻧ.ﺪ ﺻﻔﺎت ﮔﯿﺎﻫﯽ ﻣﻮرد ارزﯾﺎﺑﯽ ﺷﺎﻣﻞ وزن ﺗﺮ ﺑﺮگ، وزن ﺗﺮ ﺳﺎﻗﻪ، وزن ﺗﺮ ﺑﻼل و ﻫﻤﭽﻨﯿﻦ وزن ﺧﺸﮏ ﺑﻼل و ﻋﻤﻠﮑﺮد داﻧﻪ ﺑﻮدﻧﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ اﺧﺘﻼف ﻋﻤﻠﮑﺮد ﻋﻠﻮﻓﻪ در ﻣﺮﺣﻠﻪ ﺑﺮداﺷﺖ در ﻣﯿﺎن ﺗﺎرﯾﺦﻫﺎي ﮐﺎﺷﺖ ﻣﻌﻨﯽدار ﺑﻮده اﺳﺖ و ﺗﺎرﯾﺦ ﮐﺎﺷﺖ 15 ﻣﺮدادﻣﺎه ﻧﺴﺒﺖ ﺑﻪ ﺳﺎﯾﺮ ﺗﺎرﯾﺦﻫﺎي ﮐﺎﺷﺖ ﺑﺮﺗﺮ ﺑﻮد. در اﯾﻦ آزﻣﺎﯾﺶ ﻣﺸﺨﺺ ﺷﺪ ﮐﻪ ﻫﻨﮕﺎﻣﯽ ﮐﻪ رﻗﻢ 410 در ﺗﺎرﯾﺦ ﻣﻄﻠﻮب ﮐﺎﺷﺖ ﺷﻮد، ﻣﺎده ﺧﺸﮏ ﺑﯿﺸﺘﺮي ﻧﺴﺒﺖ ﺑﻪ ﺳﺎﯾﺮ رﻗﻢﻫﺎي ﻣﻮرد آزﻣﺎﯾﺶ ﺗﻮﻟﯿﺪ ﺧﻮاﻫﺪ ﮐﺮد. ﻫﻤﭽﻨﯿﻦ ﺷﯿﻮه ﮐﺸﺖ ﻧﺸﺎﯾﯽ در ﮐﻠﯿﻪ ﺻﻔﺎت ﻧﺴﺒﺖ ﺑﻪ ﮐﺸﺖ ﻣﺴﺘﻘﯿﻢ ﺑﺮﺗﺮ ﺑﻮد.

In order to investigate the effect of planting time and planting method on growth and yield of three forage corn cultivars at second crop experiments was conducted in 2018. The experiment was conducted as a factorial experiment in a randomized complete block design with three replications. Treatment consisted of four levels of planting time (6, 18 and 30 August and 11 September) and two planting methods (direct seeding and transplanting) and three maize cultivars (201, 260 and 410). Plant characteristics measured were leaf fresh weight, stem fresh weight, ear fresh weight, ear dry weight and seed yield. The results showed that forage yield of different planting dates were significantly different and 6 August was superior to in regions out yielded other dates of planting. In this experiment, it was found that by planting 410 at the optimum date, more dry matter would be produced than other cultivars. Also, transplanting method was superior to direct seeding in all traits.