华北农学报2017，Vol.32Issue(5)：171-176,6.DOI:10.7668/hbnxb.2017.05.026
缺磷胁迫对甘薯前期根系发育及养分吸收的影响
Impact of Phosphorus Deficiency Stress on Root Development and Nutrient Absorption of Sweet Potato
摘要
Abstract
In order to clarify the effect of phosphorus deficiency on root development and nutrient uptake of sweet potato. The sweet potato named Yanshu 25 was used as the experimental material,two treatments of phosphor-us deficiency (P0) and normal phosphorus supply (P1) was set up,the growth characteristics and nutrient uptake of sweet potato roots under phosphorus deficiency were studied by gravel culture. The results showed that P deficien-cy could inhibit the growth of shoots and root parts of sweet potato and reduce the shoot and root biomass. Compared with normal phosphate, the total surface area, total root volume, the number of root tips and average diameter of sweet potato root increased with the prolongation of culture time,but its root activity decreased,total volume and to-tal biomass were significantly lower than those of normal supply phosphorus treatment;Phosphorus deficiency could significantly increased the absorption of N,K,Ca,Mn,Cu in sweet potato root system,decreased the absorption of Mg,Fe in root system,while the N,K,Mg,Mn,Cu content increased and the Ca,Fe content decreased in shoot. Based on the above test results,phosphorus deficiency caused the growth and development of sweet potato ground and underground,but the sweet potato adapt to the lack of phosphorus environment by adjusting the root system and other root developmental parameters,so as to alleviate the effect of phosphorus deficiency on root nutrient uptake.关键词
甘薯/缺磷胁迫/根系发育/根系活力/养分吸收Key words
Sweet potato/Phosphorus deficiency stress/Root development/Root activity/Nutrient absorption分类
农业科技引用本文复制引用
马若囡,刘庆,李欢,史衍玺,李娟..缺磷胁迫对甘薯前期根系发育及养分吸收的影响[J].华北农学报,2017,32(5):171-176,6.基金项目
现代农业产业技术体系建设专项资金(CARS-10-B10) （CARS-10-B10）
