Effect of Biochar Application on Lettuce Yield and Water Productivity in Deficit Irrigation Conditions
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Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
This study was done as a pot experiment to investigate the effect of biochar applying in drought stress ‎conditions on yield and water productivity of French lettuce. It was carried out from November 2019 to ‎February 2020 in the greenhouse of Zanjan University Research Farm as a factorial experiment based on ‎randomized complete blocks design with three replications. The experimental treatments included biochar ‎at three levels (zero (B0), one (B1) and two (B2) percent w/w) and irrigation at two levels (70 (I70) and ‎‎100 (I100) percent of crop water requirement). The water requirements of the control treatment crops were ‎determined by weight method. Based on the results, application of deficit irrigation significantly reduced ‎means of plant canopy diameter, shoot dimeter, plant hight, chlorophyll content, relative water content and ‎plant wet mass (yield) compared to the control treatment (8.0, 19.8, 26.1, 13.6, 6.20 and 21.1 percent, ‎respectively). Application of one and two percent biochar significantly increased means of plant canopy ‎diameter (13.1 and 7.8 percent, respectively), shoot dimeter (31.9 and 15.5 percent, respectively), plant ‎hight (26.1 and 12.5 percent, respectively), chlorophyll content (25.5 and 13.7 percent, respectively), ‎relative water content (11.61 and 5.30 percent, respectively), plant wet mass (yield) (23.6 and 12.1 ‎percent, respectively) and water productivily (24.6 and 12.3 percent, respectively) compared to the control ‎treatment (B0). Based on the results of the treatments interaction effects, maximum and minimum mean of ‎water productivity were in I70B2 and I70B0 (27.30 and 20.02 kg.m-3, respectively) as well as in the yield ‎they were in I100B2 and I70B0 (15.54 and 10.39 t.ha-1, respectively).‎
Language:
Persian
Published:
Journal of Water and Irrigation Management, Volume:12 Issue: 4, 2023
Pages:
859 to 871
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