摘要
【目的】研究土壤水分含量对三七（Panax notoginseng）单株根干质量、有效成分含量及根腐病发病率的影响,探讨提高三七产量与质量的适宜土壤水分含量。【方法】以3年生三七植株为材料,人工控制土壤水分含量分别为田间最大持水量（w）的45%,60%,70%和85%,在盆栽条件下,利用称量、高效液相色谱（HPLC）和调查的方法,分析不同土壤水分含量对三七单株根干质量、有效成分积累及根腐病发病率的影响;通过对三七单株根干质量、有效成分积累及根腐病发病率与土壤水分含量的关系进行回归拟合,估算适宜三七生长的土壤水分含量。【结果】随着土壤水分含量的升高,三七单株根干质量呈现出先升高后降低的趋势,三七皂苷R1和人参皂苷Rg1含量没有明显的变化趋势,人参皂苷Rb1和人参皂苷Rd含量呈现出递减的趋势,根腐病发病率呈现出迅速升高的趋势。通过估算可知,100株三七根干质量最大时的土壤水分含量为田间最大持水量的59.0%,三七根中4种皂苷含量之和最大时的土壤水分含量为田间最大持水量的56.4%。【结论】在三七田间水分管理中,当土壤水分含量为田间最大持水量的56.4%~59.0%时,在提高三七产量的同时可以兼顾提升质量。
[Objectivel Effects of soil moisture content on root dry weight,active components contents and incidence of root rot of Panax notoginseng were investigated to select suitable water content for higher With the increase of soil moisture content, the root dry weight firstly increased and then decreased, the con- tents of notoginsenoside R1 and ginsenoside Rgl remained stable, while the contents of ginsenoside Rbl and ginsenoside Rd decreased gradually. The root rot incidence increased rapidly with the increase of soil moisture content. The best soil moistures for yield and the contents of four saponins were 59. 0% and 56.4%, respectively. [Conclusion] When soil moisture content was 56.4%--59.0%, both yield and quality were improved.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2014年第2期173-178,共6页
Journal of Northwest A&F University(Natural Science Edition)
基金
陕西省科技统筹创新工程计划项目(2012KTCL02-07)
关键词
三七
根生长
有效成分积累
土壤水分
根腐病
Panax notoginseng
root growth
the content of active ingredient
soil moisture content
root rot
