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草业学报 ›› 2017, Vol. 26 ›› Issue (12): 56-66.DOI: 10.11686/cyxb2017088

• 研究论文 • 上一篇    下一篇

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

赵晶忠1, 孔东升2, 3, *, 王立1, 郭有燕2   

  1. 1.甘肃农业大学林学院,甘肃 兰州 730070;
    2.河西学院,甘肃省黑果枸杞工程技术研究中心,甘肃 张掖 734000;
    3.甘肃省高校河西走廊特色资源利用省级重点实验室,甘肃 张掖 734000
  • 收稿日期:2017-03-02 修回日期:2017-05-27 出版日期:2017-12-20 发布日期:2017-12-20
  • 通讯作者: E-mail:Kongdsh@sohu.com
  • 作者简介:赵晶忠(1991-),男,甘肃永昌人,在读硕士。E-mail:545888390@qq.com
  • 基金资助:
    国家自然科学基金项目(31460113,31460189)资助

Effects of low temperature stratification on emergence of Lycium ruthenicum under drought at different sowing depths

ZHAO Jing-Zhong1, KONG Dong-Sheng2, 3, *, WANG Li1, GUO You-Yan2   

  1. 1.College of Forestry,Gansu Agricultural University, Lanzhou 730070, China;
    2.Hexi university, Lycium ruthenicum Engineering Technology Research Center of Gansu Province, Zhangye 734000, China;
    3.Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities, Zhangye 734000, China
  • Received:2017-03-02 Revised:2017-05-27 Online:2017-12-20 Published:2017-12-20
  • Contact: E-mail:Kongdsh@sohu.com

摘要: 以低温层积处理和室温干燥储藏下的黑果枸杞果实和种子为研究对象,以沙为基质,对PEG-6000溶液模拟不同强度干旱胁迫及不同沙埋深度下的出苗率、出苗势、出苗指数及恢复发芽率进行研究。结果表明:1)对比PEG 溶液胁迫下的CK组,低温层积处理种子和果实出苗率比室温干燥处理分别提高了60.00%和16.66%,起始出苗天数分别缩短了7、9 d,说明低温层积能有效破除黑果枸杞种子和果实的休眠,提高其出苗率和出苗速率。2)在-0.03、-0.10 MPa PEG 溶液高渗透势下,种子和低温层积果实的出苗指标与CK处理差异性不显著(P>0.05),表明轻度的干旱胁迫不影响种子和低温层积的果实出苗,未层积处理的果实随干旱胁迫的加剧出苗各项指标呈阶梯式显著降低;-0.10 MPa PEG溶液的干旱胁迫成为黑果枸杞出苗的阈值。而干旱胁迫解除后,种子和果实仍能恢复萌发。3)种子和果实的最适播种深度分别为1和3 cm。可直接利用黑果枸杞果实播种育苗,是一件省时、省工且出苗率较高的一项适用技术。

Abstract: The emergence of fruits and seeds of Lycium ruthenicum 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.