Document Type : Research Paper

Authors

1 M.Sc. Student, Department of Agronomy, Faculty of Crop Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran

2 Associate Professor, Department of Agronomy, Faculty of Crop Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran

3 Assistant Professor, Department of Horticulture, Faculty of Crop Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran

4 Assistant Professor, Department of Soil Sciences, Faculty of Crop Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran

Abstract

In order to determine the rosemary (Rosmarinus officinalis L.) dry matter and weeds under different fertilizer sources, an experiment was conducted as a split plot in a randomized complete block design with three replications at Sari Agricultural Sciences and Natural Resources University in 2016. The treatments consisted of: competition between plants and weeds (weedy check and weed free) as the main factor, and sub factor was fertilizer sources included sheep manure, vermicompost, sheep manure + vermicompost, NPK chemical fertilizer (N 46%, P2O5 46%, K2O 50%), NPK nano fertilizer and control (no fertilizer). The results showed that interference with weeds caused rosemary shift the maximum dry matter to the upper layers of canopy (20-40 cm). While in weed free treatment, rosemary had higher ability and uniformity in dry matter distribution in the two primary canopy layers compared to competition with weeds. In this regard, vermicompost treatment was successful with a mean of 49.51 g plant-1. Studies on density and weed biomass showed that the use of vermicompost (treatment 2) reduced density and biomass of weeds, while the chemical fertilizer caused the highest weed density and biomass. The results showed that the use of organic fertilizers such as vermicompost, not only reduce the use of chemical fertilizers and do not have environmental consequences, but also have the high ability to suppress weeds growth and decrease weed density and biomass.

Keywords

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