摘要
采用盆栽试验,研究了安塞黄绵土不同容重、不同固化剂(路邦EN-1固化剂)掺量对黑麦草生长和根系活力的影响.结果表明:黄绵土容重在1.2～1.4g·cm-3范围内,随土壤容重的增加,黑麦草叶绿素含量、根系活力、根冠比、根生物量和植株生物量均降低;各土壤容重条件下,黑麦草叶绿素含量、根系活力、根冠比、根生物量和植株生物量均高于对照,且随着固化剂掺量的增加均呈先增加后降低的趋势.土壤容重和固化剂掺量交互作用对根生物量和总生物量的影响均显著(P<0.05).总体来看,土壤容重1.3g·cm-3、固化剂掺量0.15%处理下,各指标值均最高.
Taking the loess soils with bulk density 1.2 g·cm-3, 1.3 g·cm-3, and 1.4 g·cm-3 from Ansai, Shaanxi Province as test objects, a pot experiment was conducted to study the effects of different amendment amount of soil stabilizer （EN-1 stabilizer） on the growth and root activity of ryegrass （Lolium perenne L.）. Within the range of the bulk densities, the leaf chlorophyll content, root activity, root/shoot ratio, root biomass, and plant biomass of L. perenne all decreased with increasing soil bulk density, and were higher under the amendment of EN-1 stabilizer, as compared with the control. With increasing amendment amount of EN-1 stabilizer, the leaf chlorophyll content, root activity, root/shoot ratio, root biomass, and plant biomass had a trend of increased first and decreased then. Soil bulk density and stabilizer amendment amount had significant interactive effect on the root biomass and plant biomass. Overall, the values of the test indices were the highest under 1.3 g·cm-3 soil bulk density and 0.15% EN-1 stabilizer amendment amount.
出处
《应用生态学报》
CAS
CSCD
北大核心
2011年第10期2604-2608,共5页
Chinese Journal of Applied Ecology
基金
中国科学院知识创新工程重要方向项目(KZCX2-YW-441)资助
关键词
土壤固化剂
根系活力
叶绿素
根冠比
生物量
黑麦草
soil stabilizer
root activity
chlorophyll
root/shoot ratio
biomass
ryegrass （Lolium perenne L.）
