水分和氮磷添加对水曲柳幼苗生长及光合作用的影响

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中图分类号：S725.5 文献标识码：A DOI：10.7525/j.issn.1006-8023.2025.06.004

Abstract：To investigate the efects nitrogen phosphorus aditions water treatments onthegrowth photosynthetic characteristics Fraxinus mshurica seedlings，this study used one-year-old seedlings F . mshurica as the research subject.Aromized block design was utilized with three water gradients：drought （DR，volumetric water content 13% ），control（CK，volumetric water content 26% ）， water addition（W，volumetric water content 39% ）， fourfertilizationgradients：NOPO（0g/plantN，0g/plantP），N1P1（O.5g/plantN，0.25g/plantP），N2P2（1g/plantN， 0.5g/plantP ）， N3P3（1.5 g/plant N，O.75 g/plantP）. The growth，biomass alocation， photosynthetic characteristics F .mshurica seedlings under different water fertilizer treatments were analyzed to elucidate their physiological responses to theseconditions.The results showed that water availabilityhada more significantimpactonthe growth F . mshurica seedlings compared to nitrogen phosphorus fertilization.When soil water content was 39 % fertilizationreached N2P，theseedling heightgrowth，basediameter growth，totalbiomass，ndnetphotosythetic rate achieved their maximum values. Specifically，these parameters were 82.59%，39.83 % ， 74.61% ， 64.03% （20 higher，respectively，compared to the control（soil water content 26%+ NOPO）.Compared with water addition treament，drought significantlyreduced indicatorssuchas seedling height growth，base diameter growth，total biomass， net photosynthetic rate F .mshurica seedlings. Therefore，appropriate fertilization can enhance the growth F mshurica seedlings under adequate water conditions.These findings provideatheoretical basis forthecultivation F. mshurica seedlings.

words：Fraxinus mshurica;nitrogen phosphorusaddition;water treatment;biomass;photosyntheticproperties

0 引言

随着全球变化诱发的降水格局改变（如干旱）和养分沉降（氮、磷）愈发严峻，精准选育适应水养环境变化珍贵造林树种的紧迫性日渐凸显。（剩余17612字）