THE EFFECT OF VERMICOMPOST, SHEEP MANURE, AND COW MANURE ON NUTRITION CONTENT OF CURLY LETTUCE (Lactuca Sativa var.)

Abstract

The main purpose of this study is to assess the effect of different concentrations of vermicompost, sheep manure, and cow manure on curly lettuce crop nutritional content and yield. This study was conducted using random experimental design in greenhouse conditions. The three amendments were incorporated into 2500 gr of topsoil from a wheat field in the following concentrations: 1% (25 gr), 3% (75 gr), 5% (125 gr) and 7% (175 gr). It was observed that the vermicompost had a significant effect on the germination rate. In general, application of sheep manure resulted in higher nutrition content of the plant. However, applications of cow manure resulted in higher levels of N uptake. The N content of curly lettuce increases in a linear manner reaching a high of 3.608% with an application rate of 7% cow manure.