تأثیر تراکم بوته و فصل کشت بهاره و تابستانه بر ویژگی‌های کمی و عملکرد ذرت

نوع مقاله : مقاله پژوهشی

نویسنده

دانشجوی دکتری زراعت دانشگاه آزاد اسلامی واحد خرم‌آباد

چکیده

 به‌منظور بررسی تأثیر تراکم بوته و دو فصل کشت بر ویژگی‌های کمی و عملکرد ذرت (دورگ سینگل کراس 704)، تحقیقی در سال زراعی 1394 به‌صورت کرت‌های خردشده در قالب طرح بلوک‌های کامل تصادفی با سه تکرار در منطقۀ اندیمشک اجرا شد. تراکم‌های مختلف ذرت (65، 75، 85 و 95 هزار بوته در هکتار) در کرت‌های اصلی و فصل کشت در دو سطح بهاره (5 فروردین) و تابستانه (30 تیر) در کرت‌های فرعی قرار گرفتند. نتایج نشان داد که تأثیر تراکم بوته بر همۀ ویژگی‌های مورد بررسی به‌جز شمار برگ‌های فعال و برگ‌ پرچم معنی‌دار بود. اثر فصل کشت بر ویژگی‌هایی مانند شمار برگ‌های فعال، برگ‌ پرچم و وزن هزاردانه معنی‌دار نبود. با افزایش تراکم از 65 به 75 هزار بوته در هکتار عملکرد علوفۀ تر افزایش، ولی در تراکم‌های بالاتر کاهش یافت. بیشترین عملکرد دانه در تراکم 65000 بوته در هکتار و متعلق به کشت پاییزه بود. بر پایۀ یافته‌های این آزمایش و به‌منظور برتری چشمگیر عملکرد علوفۀ ‌تر (5/72 تن در هکتار) در کشت بهاره و اعمال تراکم 85000 بوته در هکتار، تکرار آزمایش در چند منطقۀ دیگر از استان خوزستان قابل توصیه است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effects of plant density and sowing season spring and summer on quantitative characteristics and yield of corn

نویسنده [English]

  • Ali keyhani
Ph. D. Student of Agronomy, Agricultural College, Islamic Azad University, Khoram-abad, Iran
چکیده [English]

This experiment was conducted to study the effect of plant density and sowing season spring and Summer on quantitative characteristics and yield of corn (704 maize hybrids), Split-plot arrangement in randomized block design with three replications was used and during 2015 in Andimeshk. The different densities of 65, 75, 85 and 95 thousand plant per hectare was considered as main plots and sowing season in two levels sowing Spring (25 March) and sowing Summer (21 July) were randomized in sub-plots. Results showed that The effect of plant density on was significant in all the tested characters exception The number of active leaves and leaf fag. The effect season sowing on traits such as number of active leaves, leaf fag and 1000 grain weight were not significant. with of plant density increasing from 65 to 75 thousand plant per hectare increased fresh forage yield, but in densities Above was decreased. The highest grain yield in density of 65 thousand plant per hectare and Related was to sowing Summer. based on the findings of this experiment and in order to achieve the highest fresh forage yield in sowing spring and the plant density of 85 thousand plant per hectare in the Khuzestan and other regions with similar ecological conditions are recommended.

کلیدواژه‌ها [English]

  • fresh forage yield
  • Grain yield
  • leaf fag
  • Sowing date

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سابقه مقاله

  • تاریخ دریافت: 05 دی 1394
  • تاریخ بازنگری: 26 بهمن 1394
  • تاریخ پذیرش: 27 بهمن 1394
  • تاریخ انتشار: 01 اسفند 1395

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