Document Type : Research Paper

Authors

• E. Sharifi Ashoorabadi ¹
• A. Matin ²
• B. abbaszadeh ¹

¹ Research Institute of Forest and Rangland, P.O.Box: 13185-116, Tehran, Iran

² Organization in Research and Education of Agriculture

Abstract

To inverstigation of fertiltizers, manure and maxiture of them on amount and efficiency of nitrogen in agroecosystem, a field experiment was conducted on fennel (Foeniculum vulgare Mill.)in alborz Research complex in Karaj/Iran.The treatments included, various levels fertilizers (NPK),used in commercial agricultural system, different levels of manure, used in sustainable (organic) system, as well as a mixture of different ratio of fertilizers and manure, used in intermediate system, which were in comparison to the control treatment  (no fertilizers and manure applied). The  experiment design with three replication.
The results showed that, treatment ’’20 ton/ha of manure mixed with N=80, P=64 and K=80 kg/ha of chemical fertilizers’’ of the intermediate systems produced the highest amounts of protein (3.182 percent). The highest of nitrogen efficiency in agroecosystem was caught in treatment “25 ton/ha of manure mixed with N=60, p=48 and K=60 Kg/ha of chemical fertilizers’’ of the intermediate systems. In the chemical systems, The increase of fertilizers, the nitrogen efficiency reduced considerably.
Based on the results, the intermediate systems could be introduced for sustainable agriculature.

Keywords

• Agroecosystem
• Plant nutrition
• Fennel (Foeniculum vulgare Mill)