Document Type : Research Paper
Associate Professor of Moghan College of Agriculture and Natural resources - University of Mohaghegh Ardabili - Ardabil – Iran.
The irrigated cultivation of agricultural production is believed to be the country's largest consumer of freshwater resources, and the fact that Iran is located in arid and semiarid regions on Earth, the need for water for agricultural production is high. For this reason, more than 90 % of water resources are dedicated to the agricultural sector. However, in recent years, with the irregular and unsystematic spread of farming in the country, to meet the food demand of the growing population of the country, and the consecutive and severe droughts, leading to reduced rainfall, have caused loss of irrigation water and followed by drought stress for agricultural products. More than 45% of the farmlands are prone to dryness, and 38% of the world's population lives in these places. Therefore, in the future, most efforts will be made to produce more products in drought conditions. In other words, more crops should be produced per drop of water. Lack of water (usually called drought) could be defined as the lack of necessary and sufficient moisture for plants to grow normal with a complete life cycle (Fotoohie Ghazvini et al. 2011). Cucumber is one of the important greenhouse vegetables in Iran and the world. This product, in Iran, has the largest area under cultivation in comparison with other greenhouse vegetables; moreover, according to the 2009 statistics of the office of herbs, vegetables, and ornamental plants of the Ministry of Agriculture, the greenhouse cucumbers area under cultivation in Iran is 4701 ha. Cucumber is the product of warm and temperate seasons (with mild winters) and is very sensitive to adverse environmental conditions, and even rare changes in soil moisture content will have a significant adverse effect on its growth and yield (An and Liang 2013). Therefore, to study the effect of sawdust and water stress on the yield of greenhouse cucumber (Cucumis sativus L). The experiment was conducted in a complete randomized design with three replications.