Effects of organic amendments and zinc application on yield, nitrogen and zinc uptake in a rapeseed-wheat rotation

Subject Areas : Journal of Plant Ecophysiology

Ruhollah Naderi ¹ ( Assistant prof. )
Somayeh Moradnia ² ( دانشکده کشاورزی و منابع طبیعی داراب، داراب، ایران )
E. Bijanzadeh ³ ( دانشکده کشاورزی و منابع طبیعی داراب، داراب، ایران )

Received: 2015-03-05 Accepted : 2015-05-20 Published : 2016-06-01

Keywords: Vermicompost, Municipal waste compost, Cattle manure, Sheep manure, Rapeseed- Wheat Rotation,

Abstract :

To investigate the effect of organic amendments and zinc on grain yield of rapeseed and wheat, nitrogen and zinc uptake of wheat in a rapeseed-wheat rotation, a two-year study was conducted at the Agricultural college of Darab, Shiraz University in 2012-2014.In the first year of the study, treatments consisted of nitrogen fertilizer, municipal waste compost, vermicompost, sheep manure, cattle manure, and control (no fertilizer) and zinc sulphate rates of 0, 10 and 20 mg kg-1 and two rapeseed cultivars (Sarigol and RGS). In the second year of the study, in the same pots as the last year two durum wheat cultivars (Behrang and Yavarus) were sown. Results showed that sheep manure increased rapeseed yield more than the other fertilizers. Also, grain yield of Yavarus was higher than that of Behrang. The greatest grain yield observed in sheep manure treatment (5.71 g pot-1). The residual effect of sheep manure on wheat yield was more than the other organic amendments. All organic amendments except vermicompost increased nitrogen content in wheat grain significantly compared to control and the highest amount of zinc in wheat grain obtained in sheep manure treatment (39 mg kg -1). Results showed that the different rapeseed and wheat cultivars showed various responses to organic amendments and chemical N fertilizers and the type of cultivars should be taken into account while recommending these fertilizers.