Mehrdad Jafarpour - Department of Environmental Sciences, Islamic Azad University, Isfahan (Khorasgan) Branch, Isfahan, Iran
Shadi Rahimzadeh - Department of Environmental Sciences, Islamic Azad University, Isfahan (Khorasgan) Branch, Isfahan, Iran

Spinach is one of the important vegetables of Chenopodiacea family. It is from Center Aisa and the most likely Iran and it is considerable for high nutritional value. The present study investigated the influences exerted by such organic fertilizers as mushroom compost, mushroom vermicompost, sheep manure compost, sheep manure vermicompost, cow compost, cow manure vermicompost, municipal compost, chemical compost, and fertilizer-free soil upon spinach growth attributes at 8% and 12% levels. The results revealed the highest length of the plant in 12% mushroom compost and vermicompost and the heaviest fresh weight in cow and 12% mushroom vermicompost. In addition, solid soluble substances and the maximum amount of chlorophyll were reported to be attributed to 12% mushroom compost and mushroom vermicompost and compost at the 8% level, respectively. Therefore, the use of compost and vermicompost organic compounds, that had the high amount of nutrients, is suggested as a good organic manure in agriculture; it causes to increase yields, keep the soil organic matter, amend soil, and provide elements to plants

Cow manure, municipal compost, mushroom compost, spinach, vermicompost