通过盆栽实验探讨了不同热解温度和升温速率制备的杨树（Populus spp.）枝条炭对滨海盐碱土壤理化性质和海滨锦葵〔Kosteletzkya virginica （Linn.） C. Presl ex A. Gray〕生长的影响。结果显示：与对照相比，400~700 ℃制备的杨树枝条炭提高了滨海盐碱土壤有机质、铵态氮、有效磷和速效钾含量，降低了土壤电导率和硝态氮含量。同一升温速率（10 ℃·min^-1）下，与对照相比，500 ℃制备的杨树枝条炭显著（P＜0.05）促进了海滨锦葵的株高、地上部干质量、根干质量、总干质量、叶绿素相对含量、叶绿素a含量、叶绿素b含量，增幅分别为53.8%、102.8%、88.9%、98.1%、8.7%、27.4%、59.5%，对海滨锦葵生长的促进效果最佳；其次是600和700 ℃制备的杨树枝条炭，其中，700 ℃制备的杨树枝条炭更有利于根系生长；300 ℃制备的杨树枝条炭抑制了海滨锦葵的生长。慢速升温（10 ℃·min^-1）比快速升温（30~50 ℃·min^-1）制备的杨树枝条炭更有利于海滨锦葵干质量的积累。海滨锦葵的株高、地上部干质量、根干质量、总干质量与土壤的pH值、有机质含量、有效磷含量、速效钾含量总体呈显著或极显著（P<0.01）正相关，而与土壤电导率呈极显著负相关。杨树枝条炭的热解温度和升温速率均能影响滨海盐碱土壤的理化性质及海滨锦葵的生长，其中热解温度是主要影响因子。综合研究结果表明：杨树枝条炭主要通过改善根际生长环境、提高植物养分供应及对盐胁迫的耐受能力，促进海滨锦葵生长，其中，500 ℃、10 ℃·min^-1制备的杨树枝条炭对海滨锦葵生长的促进效果最好。

The effects of poplar （Populus spp.） branch biochar prepared at different pyrolysis temperatures and heating rates on physical and chemical properties of coastal saline-alkali soil and growth of Kosteletzkya virginica （Linn.） C. Presl ex A. Gray were investigated by using pot experiments. The results show that compared with the control, poplar branch biochar prepared at 400-700 ℃ increase the contents of organic matter, ammonium nitrogen, available phosphorus, and available potassium in coastal saline-alkali soil, while reducing soil electric conductivity and nitrate nitrogen content. Under the same heating rate （10 ℃·min^-1）, compared with the control, poplar branch biochar prepared at 500 ℃ significantly （P<0.05） promotes height, above-ground part dry mass, root dry mass, total dry mass, chlorophyll relative content, chlorophyll a content, and chlorophyll b content of K. virginica, and the increase amplitudes are 53.8%, 102.8%, 88.9%, 98.1%, 8.7%, 27.4%, and 59.5%, respectively, demonstrating the best growth-promoting effect on K. virginica; followed by poplar branch biochar prepared at 600 and 700 ℃, among which, poplar branch biochar prepared at 700 ℃ is more beneficial for root growth; poplar branch biochar prepared at 300 ℃ inhibits the growth of K. virginica. Poplar branch biochar prepared at slow heating rate （10 ℃·min^-1） is more beneficial for dry mass accumulation of K. virginica than those prepared at fast heating rate （30-50 ℃·min^-1）. Height, above-ground part dry mass, root dry mass, and total dry mass of K. virginica show significant or extremely significant （P<0.01） positive correlations with soil pH value, organic matter content, available phosphorus content, and available potassium content, but show extremely significant negative correlations with soil electric conductivity. Both pyrolysis temperature and heating rate of poplar branch biochar can influence the physical and chemical properties of coastal saline-alkali soil and growth of K. virginica, among which pyrolysis temperature is the dominant efffect factor. The comprehensive research results suggest that the poplar branch biochar primarily promotes K. virginica growth by improving the rhizosphere environment, enhancing plant nutrient supply, and increasing salt stress tolerance, among which, poplar branch biochar prepared at 500 ℃ and 10 ℃·min^-1 exhibits the best growthpromoting effects on K. virginica.