نوع مقاله : مقاله پژوهشی
نویسندگان
1 مربی، گروه زراعت، دانشکدة کشاورزی، دانشگاه پیام نور، تهران - ایران
2 استاد، گروه زراعت، دانشکدة کشاورزی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران - ایران
3 دانشیار، گروه زراعت، دانشکدة کشاورزی، دانشگاه آزاد اسلامی واحد اراک، اراک - ایران
چکیده
این تحقیق با هدف ارزیابی ارقام برنج در نظامهای کاشت تغییریافته اجرا شد. آزمایش بهصورت کرتهای خردشده در قالب طرح پایة بلوکهای کامل تصادفی با چهار تکرار در مزرعة پژوهشی واقع در شهرستان نکا طی سالهای 1390 و 1391 اجرا شد. نظامهای کاشت رایج منطقه، بهبودیافته و تشدید (تقویت)شده[1]، عامل اصلی؛ و ارقام پابلند سنگ طارم و طارم هاشمی و پاکوتاه ندا و شیرودی، عامل فرعی بودند.نتایج نشان داد که بیشترین تعداد پنجة بارور در کپه، تعداد خوشه در متر مربع (8/374 عدد) و تعداد خوشهچة پر در خوشه در نظام کاشت تقویتشده بهدست آمد که به تولید حداکثر عملکرد شلتوک (6412 کیلوگرم در هکتار) منجر شد. بیشترین تعداد و درصد خوشهچة پر در خوشه برای رقم طارم هاشمی بهدست آمد، ولی تعداد خوشه در متر مربع برای رقم ندا (8/396 عدد) حداکثر بود. بیشترین عملکرد شلتوک برای دو رقم پاکوتاه و پرمحصول ندا و شیرودی بهترتیب 7272 و 7315 کیلوگرم در هکتار حاصل شد. بیشترین عملکرد شلتوک بهمقدار 7770 کیلوگرم در هکتار برای اثر متقابل نظام کاشت تقویتشده و رقم ندا تولید شد. عملکرد شلتوک در نظام کاشت تقویتشده بهترتیب معادل 44/5 و 65/12 درصد بیشتر از دو نظام کاشت بهبودیافته و رایج منطقه بود. بنابراین، نظام تولید تقویتشده با ایجاد تغییرات بهینه در محیط رشد گیاه به افزایش عملکرد شلتوک و اجزای عملکرد منجر شد.
[1]SRI: System of Rice Intensification
کلیدواژهها
عنوان مقاله [English]
Comparison of agronomical traits of four rice genotypes in cropping systems at Neka region
نویسندگان [English]
- Salman Dastan 1
- Ghorban Noormohamadi 2
- Hamid Madani 3
1 Lecturer, Department of Agronomy, College of Agriculture, Payame Noor University, Tehran, Iran
2 Professor, Department of Agronomy, College of Agriculture, Islamic Azad University (Science and Research Branch), Tehran, Iran
3 Associate Professor, Department of Agronomy, College of Agriculture, Islamic Azad University, Arak Branch, Arak, Iran
چکیده [English]
To evaluate of rice genotypes in various modified systems, an experiment was carried out as split plot in randomized complete blocks design with four replications at Neka region, Mazandaran province, Iran in 2011-2012. Cropping systems were chosen as main plots including conventional, improved and System of Rice Intensification (SRI) and genotypes as sub plots including: Sang Tarom, Hashemi Tarom, Neda and Shiroodi. The results indicated that the most number of fertile tiller per hill, number of spikelet per square meter (374.8 number) and number of filled spikelet percentage per panicle was produced in SRI that has led to the most paddy yield (6412 kg/ha). The most number of filled spikelet per panicle and filled spikelet percentage per panicle was obtained for cv. Tarom Hashemi. But, number of panicle per square meter (396.8) was the highest in cv. Neda. The maximum paddy yields were 7272 and 7315 kg/ha for cv. Neda and Shiroodi. The highest paddy yield was 7770 kg/ha that produced using SRI and cv. Neda. Paddy yield in SRI was 5.44 and 12.65 percentage more than improved and conventional systems, respectively. Therefore, SRI was a cropping system that with creating optimum management practices had led to increase of paddy yield and yield components of rice.
کلیدواژهها [English]
- Conventional system
- Cultivar
- Improved system
- Paddy yield
- SRI
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