摘要
在海南海涂沙滩(非耕地资源)对药用植物库拉索芦荟进行海水灌溉试验,设6种处理,淡、海水配比分别为A1(CK):100∶0;A2:90∶10;A3:75∶25;A4:50∶50;A5:25∶75;A6:0∶100。结果表明:①用一定浓度范围的海水灌溉时,库拉索芦荟苗期返青系数、根的综合生长量等植物生态指标为处理A3>A2>A1,超过一定海水浓度后则递减;连续3年的田间试验表明,芦荟叶片鲜重、干重A1、A2、A3三种处理间没有显著差异,而根干重A3显著高于A1,A4比A1处理叶片鲜重、干重减产均在20%以内,表明海水灌溉库拉索芦荟是可行的。②海水灌溉明显推迟芦荟从营养生长向生殖生长的转化时期,随着海水比例的增加,抽苔期明显推迟。③各种处理海水灌溉的沙滩深度在0～10cm范围内,盐分含量随深度迅速下降,10cm以下下降幅度变缓;经3年的海水灌溉试验,海涂沙滩在未作任何人为调控措施下,0～50cm沙滩含盐量仍在0.3%范围内。
In the non-cultivated land resources of sea-beach of Hainan Province,some experi-ments were conducted to study the effect of growth and yields of Aloe vera L.irrigated under different ratios between seawater and fresh water treatments A1(CK):100∶0;A2:90∶10;A3:75∶25;A4:50∶50;A5:25∶75and A6:0∶100.The results showed that:(1)The coefficients of the seedlings and the general growth of Aloe vera L.were treated as A3>A2>A1irrigated with certain concentration of seawater,but the result was descended when the concentration of seawater exceeded certain extent.Field experiments were carried out for3consecutive years,and results indicated that there are no significant distinctions between the dry and net weights of Aloe under A1,A2and A3,but root weight on A3is higher than the one on A1,the leaves weight on A4is higher than the A1too,and dry weight decreased within the scope of20%.These results showed that it is feasible to irrigate Aloe vera L.with seawater.(2)The time of nutrition period shifting towards the procreation is delayed on the condition of enhancing seawater irrigation.And it is propitious to enduring leanness of Aloe vera L.as a result.(3)The content of salt descended ra-pidly at the range of0～10cm of soil depth under these kinds of seawater irrigation practices.But the change is slow below10cm.And the content of salt of0～50cm of soil is around0.3%when irrigated with seawater without artificial controls.
出处
《自然资源学报》
CSSCI
CSCD
北大核心
2003年第5期589-594,共6页
Journal of Natural Resources
基金
国家海洋863计划(2001AA627040)
国家948(20030)项目资助。
