1کارشناس ارشد زراعت دانشگاه آزاد اسلامی واحد چالوس.
2استادیار گروه زراعت دانشگاه آزاد اسلامی واحد قائم شهر.
3دانشجوی دکتری فیزیولوژی گیاهان زراعی دانشگاه آزاد اسلامی واحد علوم تحقیقات تهران.
4عضو هیأت علمی دانشگاه پیام نور استان بوشهر
5استادیار گروه کشاورزی دانشگاه آزاد اسلامی واحد جویبار
چکیده
به منظور بررسی تأثیر ارتفاع برداشت بر صفات راتونینگ ارقام مختلف برنج، آزمایشی به صورت کرت‌های خرد شده در قالب طرح بلوک‌های کامل تصادفی در چهار تکرار اجرا شد. ارقام سنگ طارم، لاین Irton، طارم هاشمیو طارم دیلمانی به عنوان عامل اصلی و ارتفاع برداشت کف‌بر، ایستاده (برداشت با ارتفاع 40 سانتی‌متر از سطح زمین) وخواباندن (برداشت با ارتفاع 40 سانتی‌متر از سطح زمین) به عنوان عامل فرعی بودند. نتایج نشان داد که رقم سنگ طارم دارای بیشترین ارتفاع، طول خوشه، تعداد کل پنجه در کپه و عملکرد دانه بود. دلیل بالاتر بودن عملکرد دانه در رقم سنگ طارم، بیشتر بودن طول خوشه و تعداد کل پنجه در کپه می‌باشد. بیشترین تعداد خوشه‌چه در هر خوشه در رقم طارم هاشمی مشاهده شد. ارتفاع گیاه و تعداد کل پنجه در کپه در روش ایستاده بیشترین بود. روش خواباندن بیشترین طول خوشه، درصد خوشه‌چه‌های پر شده و وزن هزار دانه را داشت. بیشترین طول برگ پرچم، تعداد خوشه در متر مربع، تعداد خوشه‌چه در هر خوشه و عملکرد دانه مربوط به روش کف‌بر بود. تعداد خوشه‌چه در هر خوشه با عملکرد دانه همبستگی مثبت و بین عملکرد دانه و تعداد کل پنجه در سطح احتمال یک درصد همبستگی منفی وجود داشت. نتایج تحقیق نشان داد که رقم سنگ طارم با روش برداشت خواباندن کلش بیشترین عملکرد دانه رتون را تولید نمود.
Effects of cutting height of main plant on the ratooning traits of different varieties in rice (Oryza sativa L.)
نویسندگان [English]
Hamed Firozpouri1؛ hamidreza mobasser2؛ salman dastan3؛ reza yadi4؛ abas ganbarimalidarreh5
1M.Sc. in Agronomy, Islamic Azad University, Chalus Branch, Chalus, Iran
2Assistant Professor in Agronomy, Islamic Azad University, Ghaemshar Branch, Ghaemshar, Iran
3Ph.D. Student of Crop Physiology, Islamic Azad University, Science and Research Branch, Tehran, Iran.
4Scientific Board of Departmant of Agriculture, Payam Nour University, Boshehr, Iran.
5Assistant Professor in Agriculture, Islamic Azad University, Jouybar Branch, Jouybar, Iran
چکیده [English]
In order to evaluate cutting height of the main plant on the ratooning traits of different varieties in rice, an experiment was carried out in 2006. The experimental design was a split plot based on a randomized complete block with four replications. Main plots were four varieties and lines including Sang Tarom, Tarom Hashemi, Tarom Dylamani cultivars and Irton line and sub-plots were three cutting height of ground cutting, standing (cutting at 40 cm height) and lodging stubble (cutting at 40 cm height). Results showed that the highest plant height, panicle length, number of tiller per hill and grain yield of ratoon were obtained for the Sang Tarom. The reason of highest grain yield in this variety was the increasing panicle length and increased number of tillers per hill. The greatest number of spikelets per panicle was obtained on Tarom Hashemi. The highest plant height and number of tiller per hill was observed at standing method. The lodging stubble method had the highest panicl length, percentage of filled spikelet and 1000 grains weight. The greatest flag leaf length, number of panicle per m2, number of spikelets per panicle and ratoon grain yield were observed in the ground cutting method. The number of spikelets per panicle had positive correlation with grain yield and the grain yield had negative correlation with tiller number at α=%1 level of probability. The results showed that the highest of ratoon grain yield was obtained in Sang Tarom varietiy through lodging stubble method.
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