بررسی عملکرد و شاخص‌های ارزیابی کشت مخلوط ذرت و عدس
محورهای موضوعی : یافته های نوین کشاورزیرضا صیامی 1 , بهرام میرشکاری 2
1 - باشگاه پژوهشگران جوان و نخبگان، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران
2 - گروه زراعت واصلاح نباتات، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران
کلید واژه: کشت مخلوط, نسبت برابری زمین, تراکم, مجموع ارزش نسبی,
چکیده مقاله :
به منظور بررسی عملکرد و شاخص‌های ارزیابی کشت مخلوط ذرت و عدس، یک آزمایش فاکتوریل در سال زراعی 1391 در دانشکده کشاورزی دانشگاه آزاد اسلامی واحد تبریز بر پایه طرح بلوک‌های کامل تصادفی در سه تکرار اجرا گردید. عامل اول تاریخ‌های کاشت عدس شامل 6، 16 و 26 اردیبهشت ماه و عامل دوم تراکم‌های کاشت آن و شامل 5/12%، 25%، 5/37%، 50 % و 100% تراکم مطلوب آن همراه با ذرت بود. نتایج نشان داد که عملکرد دانه ذرت و عدس در شرایط تک کشتی حداکثر بود و با حضور عدس در کشت مخلوط، از عملکرد دانه ذرت کاسته شد. نسبت برابری زمین فقط در تیمار کاشت عدس در 16 اردیبهشت ماه با حداقل تراکم آن کمتر از واحد بود و در بقیه تیمارهای کشت مخلوط نسبت به تک‌کشتی برتری داشت که از بین آن‌ها نیز تیمار اولین تاریخ کاشت عدس با حداقل تراکم آن به دلیل دارا بودن بیشترین مجموع ارزش نسبی معادل 4/1 به عنوان سودمند‌ترین حالت کشت مخلوط توصیه می‌شود.
In order to evaluate the intercropping indices of maize and lentil, a factorial experiment was conducted during 2012 in Agricultural Station of Islamic Azad University, Tabriz branch, Iran, based on randomized complete block design in 3 replicates. Studied factors were planting dates of lentil: 26th April, 6th May , and 16th May and density rates of lentil: 12.5%, 25%, 37.5%, 50% and 100% of optimum density. The results showed that Land Equivalent Ratio in all intercropped treatments except of planting date of 6th May with 12.5% optimum density was greater than 1. The maximum Relative Value Total (1.42) was obtained from first planting date with 12.5% of lentil density. Considering the importance of Relative Value Total of the product as a economic index in evaluating the intercrop, it is clear that first date of lentil planting (26th April) with 12.5% optimum density intercropped with maize was most advantageous over other mixed treatments.
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