摘要
2008年在山东农业大学药用植物栽培基地,采用盆栽技术研究控释复合肥(N∶P2O5∶K2O=14∶14∶14)对桔梗生长的影响.结果表明:与普通复合肥(N∶P2O5∶K2O=15∶15∶15)处理相比,等养分用量控释复合肥处理能够提高桔梗生育后期叶绿素含量、根体积和根系活力,增加根粗,但降低了根长度;氮素施用量在0.24和0.32 g.kg-1时,控释复合肥的桔梗根产量分别提高了26.78%和22.50%;可溶性糖、蛋白质和总皂苷含量分别提高了9.77%和6.99%、11.38%和2.20%、8.85%和5.47%.施氮量增加使桔梗可溶性糖含量下降,总皂苷含量上升.在本试验条件下,施氮量0.24 g.kg-1的控释复合肥效果最佳.
A pot experiment was conducted in 2008 to study the effects of applying controlled-release compound fertilizer（N：P2O5：K2O = 14：14：14） on the growth of Platycodon grandiflorum in the medicinal herbal farm of Shandong Agricultural University.Comparing with the application of common compound fertilizer（N：P2O5：K2O=15：15：15）,applying equivalent amount of the controlled-release fertilizer increased the leaf chlorophyll content,root volume,root activity,and root diameter of P.grandiflorum at the late growth stage,but decreased the root length.When the N application rate was 0.24 and 0.32 g·kg-1 soil, applying the controlled-release compound fertilizer increased the root yield by 26.78% and 22.50%,and the root soluble sugar,protein,and total saponin contents by 9.77% and 6.99%,11.38% and 2.20%,and 8.85% and 5.47%,respectively,compared with applying the common compound fertilizer.More nitrogen application made the root soluble sugar content decreased but the total saponin content increased.Under our experimental condition,applying the controlled-release compound fertilizer with an application rate of 0.24 g N·kg-1 soil could obtain the best effect for P.grandiflorum.
出处
《应用生态学报》
CAS
CSCD
北大核心
2010年第9期2304-2308,共5页
Chinese Journal of Applied Ecology
基金
国家"十一五"科技支撑计划项目(2006BAD10B07)资助
关键词
桔梗
控释复合肥
普通复合肥
产量
品质
Platycodon grandiflorum
controlled-released fertilizer
common compound fertilizer
yield
quality.
