江西农业学报2018，Vol.30Issue(5)：80-84,5.DOI:10.19386/j.cnki.jxnyxb.2018.05.16
收获前期水钾耦合施用对北沙参生长及活性成分含量的影响
Effects of Water-Potassium Coupling in Preharvest Period on Growth and Content of Active Components of Glehnia litteralis
摘要
Abstract
In order to increase the water and fertilizer utilization rate of Glehnia litteralis planted in coastal saline soil, we de?signed two-factor split-plot randomized-block experiment to study the effects of water-potassium coupling in preharvest period on the growth of plants, the activities of protective enzymes in leaves, the contents of osmotic adjustment substances in leaves, and the contents of active components in roots of G. litteralis. The results indicated that: under mild water stress ( the relative water content in soil was 60％～70％) , applying 150 kg/hm2 potassium could promote the growth of aboveground part and the elongation of underground roots and stems of G. litteralis plants, could enhance the activities of protective enzymes and the contents of osmot?ic adjustment substances in leaves to relieve the drought stress, and was also advantageous to the synthesis and accumulation of coumarin active components ( psoralen, imperatorin and isoimperatorin) in roots. Under moderate water stress, applying excessive potassium exacerbated the harm of water stress to G. litteralis plants, and led to its yield decrease of medicinal materials.关键词
北沙参/水钾耦合/生长/活性成分/收获前期Key words
Glehnia litteralis/Water-potassium coupling/Growth/Active component/Preharvest period分类
农业科技引用本文复制引用
房海灵,汤兴利,李莉,周义峰..收获前期水钾耦合施用对北沙参生长及活性成分含量的影响[J].江西农业学报,2018,30(5):80-84,5.基金项目
国家海洋公益性行业科研专项项目(201505023) （201505023）
江苏省农业种质资源保护与利用平台项目. （）
