Evaluation of Yield and Yield Components of Oilseed Rape in the Wheat-Oilseed Rape Strip Intercropping Influenced by Chemical and Biological Fertilizers

Subject Areas : Journal of Crop Ecophysiology

راشین Amirmardfar ¹ , A. Dabbagh Mohammadi Nassab ² , Y. Raei ³ , S. Khaghaninia ⁴ , R. Amini ⁵ , S.H. Tabataba Vakili ⁶

1 - Former Ph.D. Student of Plant Ecophysiology Department, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
2 - Professor of Plant Ecophysiology Department, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
3 - Associate Professor of Plant Ecophysiology Department, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
4 - Associate Professor of Plant Protection Department, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
5 - Associate Professor of Plant Ecophysiology Department, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
6 - M.Sc. of Plant Ecophysiology Department, Faculty of Agriculture, University of Tabriz, Tabriz, Iran

Received: 2014-07-28 Accepted : 2014-12-17 Published : 2015-01-21

Keywords: Seed yield, Biological fertilizer, Chemical Fertilizer, Strip intercropping, Oilseed rape,

Abstract :

To evaluate the effects of wheat (Triticum aestivum) and oilseed rape (Brassica napus) strip intercropping on yield components, seed and biological yields of oilseed rape, field experiments were carried out as factorial based on randomized complete block design with three replications at Research Farm of Tabriz University, Tabriz, Iran during 2010-2012 cropping seasons. The first factor consisted of four types of wheat and oilseed rape cropping system, sole crop of oilseed rape (A1),: strip intercropping with 8:3 (A2), 12:4 (A3) and 16:5 (A4) of wheat and oilseed rape rows, respectively and the other factor consisted of two fertilizer levels, B1: 100% chemical fertilizers (urea and triple superphosphate) and B2: 50% chemical fertilizers + biofertilizers (Nitrazhin and Barvar2). The results showed that strip intercropping of wheat- oilseed rape resulted in significant increase in yield components, seed yield per occupied unit area and biological yield per occupied unit area of oilseed rape as compared with mono-cropping. The number of silique per plant in intercropping systems was significantly higher than that of mono-cropping. The highest seed yield was obtained in the 16:5 rows of wheat-oilseed rape with 343.76 g.m-2 and the lowest mean was observed in mono-cropping of oilseed rape with 260.21 g.m-2. Biological yield per occupied unit area and seed yield per intercropped unit area in B1 were significantly greater than that of B2, but this treatment had no significant effect on the other traits. Because, B1 and B2 had no significant difference in seed yield per occupied unit area and due to the importance of reduction in chemical fertilizers consumption and food and environmental health care, strip intercropping of wheat-oilseed rape under 50% chemical fertilizers + biofertilizers can be recommended as a suitable cultural method.