عنوان مقاله [English]
A large part of Iran is affected by arid and semi-arid climate and drought has caused many problems in the agricultural sector. The present study aimed to investigate the characteristics of melon under drought stress conditions using animal manure and bentonite. This experiment was conducted as a split-factorial based on a randomized complete block design with three replications in Hirmand city, Iran, during the two cropping years of 2019-2020. Experimental treatments include irrigation after 25, 50, and 75% soil moisture discharge as the main plot and application of bentonite at levels of 2, 3, and 4 ton.ha-1 and application of animal manure at the rate of 20, 30, and 40 ton.ha-1 were considered as subplots. According to the results, in the first year of the experiment, fruit yield increased by 2.02 times compared to the control under 50% soil moisture discharge with the application of 4 ton.ha-1 of bentonite with 20 ton.ha-1 of animal manure. In addition, the highest total chlorophyll concentration of 2.21 mg.g-1 fresh weight was obtained in 2020 crop years under 25% soil moisture discharge using 4 ton.ha-1 of bentonite and 40 ton.ha-1 of animal manure. Also, the highest amount of proline was 0.422 μmol.g-1 fresh leaf weight and the highest activity of catalase and peroxidase enzymes were 32.60 and 4.15 OD.g-1.FW.min-1, respectively, To achieve the desired results, irrigation after 50% soil moisture discharge, application of 4 ton.ha-1 of bentonite, and 20 ton.ha-1 of animal manure for cultivation in the region is recommended.