3种生物炭及其用量对土壤化学性质及青钱柳苗生长的影响

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中图分类号：S723 文献标志码：A 文章编号：1000-2006（2025）04-0137-08

Abstract：【Objective】Cyclocaryapaliurus isamultifunctional treespecies.Thisstudy investigated theimpactsof biochar types and their adition doses on soil chemical properties，leaf photosynthetic pigment content，and growth of c paliurus seedlings，aiming to provide a scientific basis for biochar application in future C . paliurus plantations.【Method】 A two-factor randomized block experimental design was employed to investigatethe effectsof three biochar types（ C paliurus biochar，straw biochar，and bamboo biochar）and three application rates （ 5% ， 15% and 25% V/V， equivalent to 1.0% ， 3.5% ，and 6.5% m/m）on soil chemical properties，seedling growth，and leaf photosynthetic pigment content through apot experiment.【Result】After2OO daysof treatment，biochar applicationsignificantlyincreased soil pH ammoniumnitrogen，nitratenitrogen，availablephosphorus，andavailablepotassium levels，whilealsoenhancing chlorophyll a，chlorophyllb，and carotenoid contents in C .paliurus leaves.Application rate had a more pronounced effect on soil chemical indices than biochar type （ P<0.05 ）. Notably，adding 25% C. paliurus biochar increased soil pH by 32.1% ，and 25% strawbiocharsignificantlyelevated availablephosphorusand potassiumlevelsby 145.3% and 250.0% ，respectively，compared to thecontrol.Biochar application also significantly influenced seedling growth and biomass production（ P<0.05 ），withthe 5% C ·paliurus biochar treatment showing the most notable promotionin biomass production.Compared to the control，biomass in leaves，stems，roots，and total increased by 55.6% ， 47.6% ， 43.0% ，and 47.0% ，respectively，in the 5% c .paliurus biochar treatment.Correlation analysis revealed that seedling heightanddiametergrowth weresignificantlypositively corelatedwithleaf photosyntheticpigmentcontents. Additionally，all photosyntheticpigmentsweresignificantlyandpositivelycorrelatedwithsoil nitratenitrogen（ P< 0.01），while only soil available potassium showed a significant correlation with carotenoid content （ P<0.05 ） 【Conclusion】Appropriate biochar application effectively enhances soil fertility and promotes C . paliurus seedling growth. Among treatments，the 5% C . paliurus biochar application proved optimal for maximizing biomass production.

Keywords：Cyclocarya paliurus；biochar； soil pH ； soil nutrient；photosynthetic pigment；biomass production

青钱柳（Cyclocaryapaliurus）系胡桃科青钱柳属，为我国特有的单种属植物。（剩余12871字）