Effects of biochar and irrigation on soil water retention and physiological characteristics of tomato in greenhouse condition
LI Xinyu1, ZHANG Chuan1*, YAN Haofang2, AKHLAQ Muhammad1, LI Lanlan1,ZHANG Wencheng1, WANG Jizhang1
1. School of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Abstract：In order to investigate the effects of biochar application and irrigation on soil physical properties and crop growth physiological characteristics, a field comparative experiment was carried out. Taking greenhouse tomato as the experimental object, three biochar application treatments: B0(0 kg/m2), B1(2.5 kg/m2), B2(5.0 kg/m2)at three irrigation water level: T1(1.4Ep), T2(1.2Ep), T3(1.0Ep)were set. Under each biochar treatment, three different irrigation levels T1, T2 and T3(1.4Ep, 1.2Ep, 1.0Ep, respectively; Ep is the cumulative water surface evaporation). The response of soil physical properties, tomato growth, photosynthesis and other physiological indicators to the application of biochar with different irrigation amount was observed and analyzed. The results showed that the proper addition of biochar could effectively increase the soil. The maximum volume moisture content of soil water retention was 21.9% and 32.1% compared with B0. Treatment B1 was beneficial to the long-term water holding capacity of soil. The soil bulk density was reduced by 2.5%-16.6%, and the soil porosity was increased by 1.9%-10.5%. The application of biochar application(B1)could effectively improve the stomatal conductance and photosynthetic rate of tomato under full irrigation and mo-derate deficit treatment. Treatment B1 and B2 increased the photosynthetic rate at T3 under B1 and B2 is by 11.4% and 54.8%, respectively. It is observed that at T3 condition, the photosynthetic rate under B1 and B2 showed less than the photosynthetic rate under B0 by 16.7% and 50.6% respectively.
李欣雨,张川*,闫浩芳,AKHLAQ Muhammad,李岚兰,张文程,王纪章. 生物炭和灌水量对土壤保水性及温室番茄生理特性的影响[J]. 排灌机械工程学报, 2022, 40(3): 317-324.
LI Xinyu,ZHANG Chuan*,YAN Haofang,AKHLAQ Muhammad,LI Lanlan,ZHANG Wencheng,WANG Jizhang. Effects of biochar and irrigation on soil water retention and physiological characteristics of tomato in greenhouse condition. Journal of Drainage and Irrigation Machinery Engin, 2022, 40(3): 317-324.
