辽宁农业科学Issue(5)：1-7,7.DOI:10.3969/j.issn.1002-1728.2024.05.001
紫穗槐叶水势对生物炭基肥和干旱胁迫的响应特征研究
Study on Responses Characteristics of Leaf Water Potential in Amorpha fruticosa Seedlings to Biochar-based Fertilizer and Drought Stress
摘要
Abstract
To investigate the response characteristics of leaf water potential in Amorpha fruticosa seedlings un-der drought stress and rewatering,various amounts of biochar-based fertilizer were applied.Pot experiments were conducted in a greenhouse to evaluate the effects of different application rates of biochar-based fertilizer(750 kg/hm2,1 500 kg/hm2 and 2 250 kg/hm2),different levels of water stress(100.00%,87.84%,70.00%,52.16%,and 40.00%soil relative water content),and rewatering conditions on leaf water poten-tial in A.fruticosa seedlings.The results revealed that severe drought conditions led to a decrease in leaf water potential and an increase in the water stress index of A.fruticosa seedlings when biochar-based fertilizer was applied at rates of 750 kg/hm2,1 500 kg/hm2 and 2 250 kg/hm2.Among the treatments,the lowest leaf wa-ter potential in seedlings was observed under the 40.00%SRWC treatment.Notably,the application of 2 250 kg/hm2 of biochar-based fertilizer resulted in a decrease of 0.67 MPa in leaf water potential after 15 days of drought stress.However,the leaf water potential of A.fruticosa seedlings exhibited recovery over time upon rewatering.A strong correlation was found between the severity of drought stress and the duration of the drought.Conversely,after 6 days of rewatering,the leaf water potential of A.fruticosa seedlings subjected to 30 days of drought stress did not fully recover to the control level in the 52.16%and 40.00%SRWC treat-ments.However,in the case of 15 days of drought stress,the leaf water potential of A.fruticosa seedlings re-covered to the control level and even exhibited compensation and super-compensation effects.关键词
干旱胁迫/生物炭基肥/叶水势/复水/恢复Key words
Drought stress/Biochar-based fertilizer/Leaf water potential/Rewater/Recovery分类
农业科技引用本文复制引用
冯树林,周婷,王军利..紫穗槐叶水势对生物炭基肥和干旱胁迫的响应特征研究[J].辽宁农业科学,2024,(5):1-7,7.基金项目
陕西省教育厅一般专项科研计划项目(22JK0609) （22JK0609）
咸阳职业技术学院博士科研基金项目(2021BK05) （2021BK05）
咸阳职业技术学院"双高计划"专项(2021SGC07) （2021SGC07）
