International journal of Agronomy and Plant Production. Vol., 4 (6), 1220-1225, 2013 Available online at http:// www.ijappjournal.com ISSN 2051-1914 ©2013 VictorQuest Publications Role of Organic Fertilizers on Morphological and Yield Parameters in Rice (Oryza sativa L.) Morteza Siavoshi 1 , Salman Dastan 2 , Esmail Yassari 3 , Shankar. L. Laware 4 1- Lecturer, Department of Agricultural Science, Payame Noor University, I. R. of Iran 2- Lecturer, Department of Agricultural Science, Payame Noor University, I. R. of Iran 3- Assistant Professor, Department of Agricultural Science, Payame Noor University, I. R. of Iran 4- Associate Professor, Department of Botany, Fergusson College, Pune, India. *Corresponding Author: Morteza Siavoshi Abstract In order to study the role of organic fertilizers on morphological and yield parameters in rice, an experiment was carried out in years 2008 and 2009, in randomized block design based on 4 replications. Cow manure, poultry manure, rice straw and rice husk were used for formulation of organic fertilizers. The treatments of organic fertilizers CM, PM, CMR, PMR, and CPMR were used alone at 4t/ha in five treatments. Half dose of CPMR was used with half dose of RDF (N-50, P-25, K-25 kg/ha) at one level and RDF (N=100, P=50, K=50 kg/ha) alone at one level. The plants without treatments considered as control. Grain yield and morphological parameters were significantly increased in all the treatments over control. An increase in the grain yield may be due to the increase Parameters like dry matter, total number of tiller, flag leaf length, number of fertile tillers per hill and 1000-seed weight. Keywords: Morphological and yield parameters, Organic fertilizers, Rice, Grain yield. Introduction In recent years, conventional chemical farming practices, which substantially increased crop yields, have created numerous problems for humankind. Ground water pollution is considered a result of chemical farming practices. Adverse human and animal health effects are caused by residual and cumulative agricultural chemicals used for crop protection. Excessive soil erosion caused by conventional farming systems has seriously reduced soil fertility and crop productivity. Rice is one of the most important spring-summer annual crops grown in Iran. The productivity of rice is decreasing year by year due to use of chemical fertilizers and lowering of micronutrients, organic matter and microbes in the soils. Also, higher cost of agricultural chemicals significantly lowered the net cash return to farmers (Yadana et al., 2009). The productivity of rice can be increased with proper soil management by amending the soils with essential nutrients and organic matter as well as increasing soil micro flora. It is well documented that various manures (Farm yard manure, cow manure and poultry manure etc,) and agricultural residues when added to soil, they improve physical and biological properties of soil and support plant growth. Organic matter improves the soil physicochemical condition and increases the biological activities within the soil. This property ultimately affects the production in a positive way. In addition, organic fertilizers save nitrogen fertilizer in rice fields and reduce inputs needed (Ebaid and El-Refaee, 2007). Hence, in present investigation it was planned to formulate organic fertilizers based on cow manure and poultry manure along with rice straw and husk. These organic fertilizers were formulated based on nutrients required for rice.