不同基质对香港四照花幼苗生长及光合特性的影响  

Effects of Different Substrates on Growth and Photosynthetic Characteristics of Dendrobenthamia hongkongensis Seedling

作　　者：唐健民 朱成豪 邹蓉[1] 韩愈 李吉涛[1] 陈宗游[1] 唐辉[1] TANG Jianmin;ZHU Chenghao;ZOU Rong;HAN Yu;LI ditao;CHEN Zongyou;TANG Hui(Guangxi Institute of Botany, Chinese Academy of Sciences, Guilin 541006, China;Guilin Medical College, Guilin 541000, China;College of Life Sciences, Guangxi Normal University, Guilin 541006, China)

机构地区：[1]广西壮族自治区中国科学院广西植物研究所,广西桂林541006 [2]桂林医学院,广西桂林541000 [3]广西师范大学,生命科学学院,广西桂林541006

出　　处：《林业调查规划》2018年第5期179-183,187,共6页Forest Inventory and Planning

基　　金：广西创新驱动发展专项资金项目(桂科AA17204045-4);广西植物研究所基本业务费项目(桂植业16004);广西科技基地和人才专项(桂科AD17129022);桂林市科技成果转化与推广(20140115-1);柳州市科技攻关项目(2016B050202)项目资助

摘　　要：以香港四照花为试验材料,研究比较了6种不同栽培基质对其幼苗生长特性和光合特性的影响。结果表明,M6(即黄土∶沙土∶泥炭土的比例为1∶1∶1)混合基质最适合香港四照花生长。M6基质处理的植株地径、株高、冠幅3项生长指标均显著高于其他基质(P <0.05),该混合基质促进了香港四照花对养分的吸收利用和植株的生长发育,捕获光的能力得到增强,净光合速率(Pn)、水分利用效率(WUE)和气体交换等相关参数亦均优于其他基质;而单一基质M5 (珍珠岩)处理的植株生长发育和光合特性的相关指标最差,不利于幼苗的生长发育;其他单一或混合基质对植株生长的影响介于二者之间。认为黄土∶沙土∶泥炭土的比例为1∶1∶1的混合基质可作为香港四照花栽培基质推广。The effects of six different substrates on the growth and photosynthetic characteristics of D. hongkongensis were studied. The results showed that the M6 mixed substrate (loess : sandy soil : peat soil in 1 : 1:1 ) created better conditions for the growth of D. hongkongensis. The growth indexes of diam- eter, height and crown with the M6 mixed substrates were all significant (P < 0.05). I'n addition, the mixed substrate promoted the absorption and utilization of nutrients by D. hongkongensis and enhanced the ability to capture light. The parameters of net photosynthetic rate, water use efficiency and gas ex-change were better than other five substrates. The parameters of growth and photosynthetic characteristics with the single substrate M5 (perlite-based) were the worst and not conducive to the seeding growth.Effects of other single or mixed substrates on plant growth were in between. The M6 mixed substrate of lo- ess: sandy soil : peat soil in 1: 1:1 was considered as the popularized one to cultivate D. hongkongensis.

关 键 词：香港四照花 幼苗生长 光合特性 栽培基质 混合基质 净光合速率 

分 类 号：S723.13[农业科学—林木遗传育种] Q25[农业科学—林学]