摘要
以半年生苹婆(Sterculia nobilis Smith)幼苗为研究对象,采用4种光照水平(100.0%、41.3%、14.3%、3.6%自然光)和4种施肥水平(0、2000、4000、6000 mg/株)的双因素盆栽试验,研究遮光、施肥及两者交互处理对苹婆幼苗生理特性及氮素积累的影响。结果表明,遮光、施肥与交互作用对苹婆各项指标的影响在6、9、12月均极显著,SOD、CAT、POD 3种保护酶活性及叶片N素浓度均在9月最高,3月最低。随着光照度逐渐降低,MDA含量、SOD活性、POD活性整体呈先降低后升高,在同一光照水平下,随着氮素增加,MDA含量在N0氮素水平下达到最大值,L1光照处理下3种酶活性相对于其他光照条件偏低。在同一氮素水平下,MDA含量在L0光照条件下达到最大值,N3氮素水平下3种酶活性相对于其他氮素水平偏低。不同光照和氮素水平之间存在显著的互作效应,通过对苹婆幼苗各指标进行隶属函数综合评价得出苹婆幼苗的隶属值最大的是L1N3处理。光照过强、光照不足、缺少氮肥均不利于苹婆生长,适度遮阴(41.3%自然光)和施加氮肥(6000 mg/株)能有效促进苹婆幼苗生长发育。
Taking half year old Sterculia nobilis Smith seedlings as the research object,the effects of shading,fertilization and their interaction on physiological characteristics and nitrogen accumulation of Sterculia nobilis Smith seedlings were studied by two factor pot experiment with four light levels(100.0%,41.3%,14.3%,3.6%natural light)and four fertilization levels(0,2000,4000,6000 mg/plant).The results showed that the effects of indicators reached extremely significant levels in June,September and December,the activities of SOD,CAT and POD and N concentration in leaves were the highest in September and the lowest in March.With the gradual decrease of light intensity,the content of MDA,the activity of SOD and POD showed the trend of decreasing first and then increasing.Under the same light level,with the increase of nitrogen,the content of MDA reached the maximum at N0 nitrogen level,and the three enzyme activities under L1 light treatment were lower than those under other light conditions.Under the same nitrogen level,the content of MDA reached the maximum under L0 light condition,and the three enzyme activities were lower under N3 nitrogen level compared with other nitrogen levels.There was significant interaction between different light and nitrogen levels,according to the comprehensive evaluation of the membership function of each index of Sterculia nobilis Smith seedlings,it is concluded that the largest subordinate value of Sterculia nobilis Smith seedlings is L1N3 treatment.The research indicated that strong light,insufficient light and lack of nitrogen fertilizer were not conducive to the growth of Sterculia nobilis Smith seedlings,and oderate shading(41.3%natural light)and increasing nitrogen application(6000 mg/plant)could effectively promote the growth and development of Sterculia nobilis Smith seedlings.
作者
潘陆荣
周袁慧子
王艺锦
苏远玉
王凌晖
PAN Lu-rong;ZHOU Yuan-huizi;WANG Yi-jin;SU Yuan-yu;WANG Ling-hui(Forestry College of Guangxi University,Nanning530004,China;Architectural Engineering College of Guangxi University for Nationalities,Nanning530004,China;Guangxi State-owned Qinlian Forest Farm,Qinzhou535000,Guangxi,China)
出处
《湖北农业科学》
2021年第14期79-85,共7页
Hubei Agricultural Sciences
基金
玉林市科学技术项目[玉市科〔2013〕68号]
广西国有钦廉林场星岛湖树种调整和改造模式研究(钦廉科字2017-1号)。
