Investigating the Effects of Biochar on the Performance and Yield Components of Greenhouse Cucumber under Water Deficit Conditions

reenhouse conditions, the use of biochar on yield and yield components of cucumber and to determine the effect of water stress and biochar on cucumber yield components in Birjand region. Application of biochar in soil increases the yield of cucumber (Cucumis sativus) of Storm cultivar and the combined effect of water stress and biochar modulates the effect of water stress on reducing crop yield.

Due to the conditions in the greenhouse and the type of cultivation (stacks), this study was selected as a factorial in a randomized complete block design with three dehydration treatments and four biochar treatments. Drought stress has three levels of 100, 75, 50% water requirement. And biochar levels of zero, 2, 4, 6 grams per kilogram of soil are selected The type of cultivation is in the form of a stack or a stack in which a stack is selected and divided into equal plots. Based on the number of treatments and replications selected, 36 plots are required, each plot being 80 cm long and 40 cm wide. After preparing a suitable culture medium, two seeds were planted in each plot with a distance of 2 cm because if the seed did not germinate or was destroyed, another one could be used as an alternative. Then, all plots were irrigated automatically until the plants became four-leafed, and pest control operations were carried out equally and equally among all plots.

The results show that biochar had a significant effect on cucumber height, cucumber diameter, cucumber weight, plant height, number of leaves and stem diameter at 1% level. It can be seen that water stress at the level of 1% had a significant effect on cucumber height, cucumber weight, number of leaves and stem diameter. But its effect on cucumber diameter index and plant height was not significant. In this experiment, the interaction effect of biochar and water stress at 1% level had a significant effect on cucumber height and cucumber weight and at 5% level on cucumber diameter and stem diameter, but its effect on plant height and number of leaves was not significant.

Drought stress was significant on cucumber height, cucumber weight, number of leaves and stem diameter at 1% level and had no effect on cucumber diameter and plant height indices. • The best performance in plant height, cucumber weight, number of leaves and stem diameter at I100 level. Consumption of 6 grams of biochar per kilogram of soil at the level of water stress, 100% water requirement had the highest yield on growth indices (cucumber height, cucumber weight) and at the level of 5% on stem diameter and cucumber diameter indices. The use of biochar on the indices of stem diameter, cucumber diameter, cucumber weight, cucumber height, number of leaves and plant height was positive and significant and the use of 6 g of biochar per kg of soil in all indicators has the highest yield for cucumber plant. The interaction effect of water stress and biochar was significant on cucumber height and cucumber weight indices at 1% level and on cucumber diameter and stem diameter indices at 5% level, but the interaction effect of stress and biochar on plant height and leaf area indices was not significant.