农业科学与食品研究杂志
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Estimating the Energy Gap in Greenhouse Cucumber Production

Bardia Bayat, Mohammad Hossein Ansari*, Marjan Diyanat, Ali Mohammadi Torkashvand

The energy gap of greenhouse cucumbers in this research was investigated due to Iran's large greenhouse cultivation area and the high input energy entrance into these agro-ecosystems. Accordingly, single flower, double flower, middle flower, and multi flower cucumber varieties were cultivated at distances of 37 cm, 42 cm, and 47 cm. The important achievement of this research is making it possible to calculate the energy gap by the yield gap. The turning point is breaking the yield gap into its constituent units, which are caused by management and arrangement. The results showed that up to 104 tons/ha of yield gap was created in the worst case by choosing the wrong variety and inappropriate planting distance, which is equivalent to 82,000 MJ/ha of lost energy in multi-flower varieties. While this amount reduced up to 59 tons/ha in middle flower varieties, which is equivalent to 47,000 MJ/ha of lost energy. Indeed, agro-ecosystems achieved higher output energy by spending specific input energy, which is the basis for sustainable agriculture and reducing the resources lost on a large scale.