草业学报2017，Vol.26Issue(12)：56-66,11.DOI:10.11686/cyxb2017088
低温层积处理对干旱和深埋胁迫下黑果枸杞出苗的影响研究
Effects of low temperature stratification on emergence of Lycium ruthenicum under drought at different sowing depths
摘要
Abstract
The emergence of fruits and seeds of Lycium ruthenicurn after low temperature stratification and storage at room temperature in dry conditions was investigated.Emergence rate,emergence potential,seedling index and recovery rate of germination under different intensities of drought stress and different planting depth in sand were simulated using PEG-6000 solution.The germination rate of seeds and fruits treated with PEG solution was increased by 60.00％ and 16.66％ respectively compared with the control.The time to emerge was reduced by 7 and 9 days respectively,indicating that low temperature stratification could effectively eliminate the dormancy of seeds and fruits of L.ruthenicum.High osmotic potentials (-0.03 to-0.10 MPa) did not influence emergence indicating that under mild drought stress,fruit germination was not affected by low temperature stratification.Both the seed and fruit were able to germinate after drought stress was relieved.It was concluded that the optimum sowing depth of seeds and fruits of L.ruthenicum is 1 and 3 cm respectively.It is also possible to successfully plant the fruit of L.ruthenicum rather than plant seedlings,saving time and labour.关键词
黑果枸杞/低温层积/干旱胁迫/出苗率Key words
Lycium ruthenicum/cold stratification/drought resistance/emergence rate引用本文复制引用
赵晶忠,孔东升,王立,郭有燕..低温层积处理对干旱和深埋胁迫下黑果枸杞出苗的影响研究[J].草业学报,2017,26(12):56-66,11.基金项目
国家自然科学基金项目(31460113,31460189)资助. （31460113,31460189）
