摘要
对海水灌溉下Salicornia bigelovii的不同种植密度及其个体间的养分积累及土壤盐分的影响进行了调查。结果表明:单位面积地上部的干质量随种植密度增加呈平缓增高,符合最终产量恒定法则;个体间竞争株质量随种植密度增加而降低;随S.bigelovii种植密度的上升,土壤的含盐量和电导率(EC)值明显降低,56株/m2处理区钠的吸收量达261.22g,在336株/m2处理区钠的吸收量高达489.99g;随种植密度的增加,个体间的无机盐含量略有下降,但没有显著差异,相反茎、叶中碳和氮含量呈上升趋势。
The effect of planting density (PD) on the growth and nutrient absorption of Salicornia bigelovii was examined under salt (NaCl) treatments. The dry weight of shoot increased in response to PD. The increment in dry matter reached peak value at a certain PD. The dry weight per plant decreased in response to PD owing to individual competition. The electric conductivity (EC) value and the salt content of the soil decreased conspicuously in response to PD. The absorption of sodium (Na) by plant was 261. 22 g/m^2 under the PD of 56 plants/m^2. It increased to 489. 99 g/m^2 under 336 plants/m^2. The mineral contents in plants tended to decrease slightly in response to PD. Carbon (C) and nitrogen (N) content in shoot increased in response to PD.
出处
《草业科学》
CAS
CSCD
2008年第11期36-39,共4页
Pratacultural Science
基金
中央级公益性科研院所基本科研业务费专项(2007-8-01)
中日合作项目"中国内陆荒漠化防治及开发利用的研究"(2001-2010)
关键词
海水灌溉
盐角草属
种植密度
无机盐
电导率
seawater irrigation
Salicornia bigelovii
planting density
mineral
electric conductivity