نوع مقاله : مقاله پژوهشی
نویسندگان
1 استادیار گروه زراعت و اصلاح نباتات
2 دانشجوی دکتری فیزیولوژی گیاهان زراعی گروه زراعت، دانشکده کشاورزی، دانشگاه ارومیه
3 استاد گروه اکوفیزیولوژی گیاهی، دانشکده کشاورزی، دانشگاه تبریز
4 دانشجوی سابق کارشناسی ارشد زراعت، دانشکده کشاورزی، دانشگاه مراغه
چکیده
کلیدواژه‌ها
عنوان مقاله [English]
نویسندگان [English]
Abdollah Javanmard1*, Jalal Arzheh2, Adel Dabbagh Mohammadi Nasab3, Taha Ezan4
1- Assistant Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Maragheh, Iran.
2- Ph.D Student of Crop Physiology, Department of Agronomy, Faculty of Agriculture, University of Urmia, Iran.
3- Professor, Department of Plant Ecophysiology, University of Tabriz, Iran.
4- Former M.Sc. Student of Agronomy, Faculty of Agriculture, University of Maragheh, Iran.
*Corresponding author: A.javanmard@maragheh.ac.ir
Received: 2014.03.06 Accepted: 2014.10.04
Abstract
In order to evaluation of intercropping of forage sorghum (Sorghum bicolor) and vetch (Vicia villosa) in different nitrogen fertilizer levels and different planting patterns, a field experiment was conducted at the Agricultural Research Station, University of Maragheh in 2013 growing season. Experimental design was factorial based on randomized complete block design (RCBD) with three replications. The treatments were nitrogen fertilizer levels (0, 30 and 60 kg N. ha-1) and three planting patterns [(Planting sorghum on the furrow bank and planting vetch in the both side of furrow bank (P1), Planting sorghum in one side of furrow bank and planting vetch in other side (P2) and Planting sorghum on the furrow bank and planting vetch on the furrow bank and both side of furrow bank (P3)]. Results indicated that nitrogen fertilizer application increased sorghum dry matter yield and first planting pattern (P1) had highest sorghum yield among intercropping treatments. The highest forage yield (371.7 kg. ha-1) of vetch produced in the third nitrogen fertilizer level (N60) and third planting pattern (P3). In all intercropping treatments, land equivalent ratios (LER) were well above 1 indicating yield advantages for intercropping. The greater LER of the intercrops was mainly due to a greater resource use and resource complementarities that when the species were grown alone. The highest LER (1.94) and RVT (1.14) were obtained in first planting pattern with no nitrogen application. Also the greatest LERs (1.92) were obtained under interaction of second planting pattern and third nitrogen fertilizer level (N60). In general, it can be stated that for the production of forage, the combination of first planting pattern with no nitrogen application is superior on other planting patterns.
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