羧甲基纤维素钠对红海榄幼苗生长和土壤养分的影响  

Effects of Sodium Carboxymethyl Cellulose on Growths of Rhizophora stylosa Seedlings and Soil Nutrients

作　　者：李婷 林梓 朱立安 李玫[2] 陈粤超 陈玉军[2] Li Ting;Lin Zi;Zhu Li'an;Li Mei;Chen Yuechao;Chen Yujun(Institute of Eco-environmental and Soil Sciences,Guangdong Academy of Sciences,National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China,Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management,Guangzhou,Guangdong 510650,China;Research Institute of Tropical Forestry,Chinese Academy of Forestry,Guangzhou,Guangdong 510520,China;Zhanjiang Mangrove National Nature Reserve Administration,Zhanjiang,Guangdong 524088,China)

机构地区：[1]广东省科学院生态环境与土壤研究所、华南土壤污染控制与修复国家地方联合工程研究中心、广东省农业环境综合治理重点实验室,广东广州510650 [2]中国林业科学研究院热带林业研究所,广东广州510520 [3]广东湛江红树林国家级自然保护区管理局,广东湛江524088

出　　处：《广西林业科学》2024年第1期42-48,共7页Guangxi Forestry Science

基　　金：广东省重点领域研发计划(2020B020214001);海南省自然科学基金项目(421RC658);国家自然科学基金项目(41771232)。

摘　　要：为明确羧甲基纤维素钠(Sodium Carboxymethyl Cellulose,CMC)对沿海困难立地砂砾质土壤的改良作用,以红海榄(Rhizophora stylosa)胚轴为材料,通过室内潮汐模拟试验,研究不同CMC施用量(质量比为1.6%、2.4%、3.2%、4.0%和4.8%)对红橄榄幼苗生长和土壤养分的影响。结果表明,随CMC施用量增加,红海榄幼苗生长量和生物量整体呈先增后减的趋势,均在4.0%CMC处理下最大。与CK相比,不同CMC处理下红海榄幼苗的株高、地径和叶片数分别增加9.78%~38.54%、13.83%~54.31%和20.00%~36.67%;根、茎和叶生物量分别增加10.58%~64.72%、7.97%~36.76%和37.62%~117.99%;土壤有机质、全钾和速效钾含量分别显著增加625.22%~671.96%、147.62%~161.52%和55.56%~77.78%。CMC可促进红海榄幼苗生长,提高土壤养分,可作为沿海困难立地砂砾质土壤的改良剂,推荐CMC施用量为4.0%。In order to clarify improvement effects of sodium carboxymethyl cellulose(CMC)on sandy gravel soils in coastal difficult sites,taking Rhizophora stylosa hypocotyls as materials,effects of different CMC application amounts(mass ratios were 1.6%,2.4%,3.2%,4.0%and 4.8%)on growths of R.stylosa seedlings and soil nutrients were analyzed through indoor tidal-simulation test.Results showed that growths and biomass of R.stylosa seedlings showed increasing and then decreasing trends with increase of CMC application amounts,which were maximal at 4.0%CMC treatment.Compared with CK,plant heights,ground diameters and number of leaves increased to 9.78%-38.54%,13.83%-54.31% and 20.00%-36.67% respectively,and biomass of roots,stems and leaves increased to 10.58%-64.72%,7.97%-36.76% and 37.62%-117.99% respectively,and contents of soil organic matter,total potassium and available potassium significantly increased to 625.22%-671.96%、147.62%-161.52% and 55.56%-77.78% respectively.CMC could promote growths of R.stylosa seedlings and improve soil nutrients,which could be used as soil amendments for sandy gravel soils in coastal difficult sites and recommended application amount was 4.0%.

关 键 词：羧甲基纤维素钠 红树林 红海榄 砂砾质土壤 土壤改良 

分 类 号：S156.2[农业科学—土壤学]