Document Type : Research Paper

Authors

• E. Sharifi Ashorabadi ¹
• A. Ghalavand ²
• Gh. Noormohammadi ²
• A. Matin ²
• Gh. Amin ²
• P. Babakhanlou ²
• M.H. Lebaschi ¹
• F. Sefidkon ¹

¹ Research Institute of Forests and Rangelands

² -

Abstract

The effect of different amounts of fertilizers, N.P.K., manure, as well as mixture of them in an expriment was investigated at Alborz Research Center, karaj, IRAN in 1996-97. The effects of the fertilizers were studied on seed and shoot yield of Fenel (Foeniclum vulgare), system treatments include various levels of net chemical fertilizers, N.P.K., used in comercial or chemical agricultural systems as well as different levels of manure used in sustainable or organic systems, and a mixture of different ratios of fertilizers and manure used in mixture systems, and the control (with any fertilizer or manure). The expriment was condacted using completely Randomized Block Exprimental design with three replications.
The results of first and second years of the expriment showed that in chemical systems, seed and straw had a higher performace in treatments 5(N=160 P= 128 and K=160 Kgha') and No.4 (N=120, P=96 and K=120 Kgha), which equalled 901.33 and 4326.2 Kgha?, respectively while in organic systems related to treatment No.13(40 tonh' manure) that resulted 947.17 and 5147.2 Kgha'', While the highest yield of seed and straw in mixture agroecosystems belonged to treatment No.10 (a mixture of 25 tons of manure with N=60, P=48 and K=60 kgha! chemical fertilizers) with seed an straw yield 1182.67 and 6627 Kgha, respectively.
In comparison with the control treatment, seed and straw yield increase were: 69.37% and 31.49% for net chemical system; 122.23% and 101.43% for mixture system; and 77.98% and 56.44% for organic system respectively.
The combined analysis of data from two consecutive years of the expriment indicated that shoot biomass of plant, seed & straw yield in mixture systems in comparison to net chemical and organic systems, rised significantly, which is comparisonly more tangible in the second year. This results could be related to that mixture of chemical fertilizer and manure, which is a nutritive source for the plant and plays an important role in improvment of chemical and physical structure of soil.