TY - JOUR ID - 89150 TI - Effect of Biochar Application on Lettuce Yield and Water Productivity in Deficit Irrigation Conditions JO - Water and Irrigation Management JA - JWIM LA - en SN - 2251-6298 AU - Nikbakht, Jaefar AU - Parvizi, Arezoo AU - Barzegar, Taher AD - Department of Water Engineering, Agricultural Faculty, University of Zanjan, Zanjan, Iran. AD - Department of Horticultural Sciences, Agricultural Faculty, University of Zanjan, Zanjan, Iran. Y1 - 2023 PY - 2023 VL - 12 IS - 4 SP - 859 EP - 871 KW - Drought stress KW - Irrigation water managment KW - Plant wet mass KW - Soil moiture content DO - 10.22059/jwim.2022.342723.997 N2 - 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).‎ UR - https://jwim.ut.ac.ir/article_89150.html L1 - https://jwim.ut.ac.ir/article_89150_ad14c421a8e60bac28cce96e6b56c8e5.pdf ER -