不同引发方法对青绿苔草种子发芽的影响  

Effects of different priming methods on seed germination of Carex leucochlora

作　　者：李慧 滕珂 岳跃森 滕文军 温海峰 韩朝 张辉 范希峰 武菊英 LI Hui;TENG Ke;YUE Yuesen;TENG Wenjun;WEN Haifeng;HAN Chao;ZHANG Hui;FAN Xifeng;WU Juying(Beijing Academy of Agriculture and Forestry Sciences,Beijing 100097,China;School of Landscape Architecture,Beijing University of Agriculture,Beijing 102206,China)

机构地区：[1]北京市农林科学院,北京100097 [2]北京农学院园林学院,北京102206

出　　处：《草业科学》2021年第8期1537-1547,共11页Pratacultural Science

基　　金：北京市科技计划项目(D171100007217001);北京市农林科学院院科技创新能力建设专项(KJCX20180706、KJCX20200801)。

摘　　要：青绿苔草(Carex leucochlora)作为一种优良的草坪地被植物,在园林绿化建设中具有广泛的应用前景,但由于其种子发芽时间长,限制了其大规模开发利用。本文研究了不同引发剂和引发方法对青绿苔草种子发芽的影响。结果表明:单一引发中,5%KNO3以及480 mg·L^(-1)赤霉素(GA3)对青绿苔草种子的引发效果较佳,经处理后,与未经任何处理的青绿苔草种子(CK)相比,其发芽势分别提高11%和32%,发芽率均提高4%,发芽指数分别提高2.06和2.69,平均发芽时间分别缩短2.11和2.72 d;混合处理中,效果最佳的处理为先将种子用5%KNO3引发,后经10%NaOH溶液浸种20 min,再通过480 mg·L^(-1) GA3进行引发,与CK相比,其发芽势和发芽率分别提高92%和5%,发芽指数提高5.92,平均发芽时间由9.01 d缩短至4.46 d。本研究解决了青绿苔草种子发芽慢的问题,为青绿苔草在园林绿地中规模化应用提供了依据。As an excellent turf ground cover, Carex leucochlora has potential application in landscape construction.However, the large-scale development and utilization of seeds are limited due to the long germination time. The effects of different initiators and methods on seed germination of C. leucochlora were studied. The results showed that 5% KNO3 and 480 mg·L^(-1) GA3 had the best priming effect on C. leucochlora seeds. Compared with the untreated seeds(CK), their germination potential increased by 11% and 32% respectively, the germination rate of both increased by 4%, the germination index increased by 2.06 and 2.69, respectively, and the average germination time was shortened by 2.11 d and 2.72 d,respectively. In the mixed treatment experiment, the best treatment was found to be the protocol in which seeds were first initiated with 5% KNO3, then soaked in 10% NaOH solution for 20 min, and then initiated by addition of 480 mg·L^(-1) GA3.With this protocol, the germination potential and germination rate were increased by 92% and 5% compared with the untreated seeds. Similarly, the germination index was increased by 5.92, and the average germination time was shortened from 9.01 d to 4.46 d. This study solved the problems of slow germination of C. leucochlora seeds, and provided a basis for the large-scale application of C. leucochlora in the garden green space.

关 键 词：青绿苔草 种子 渗调引发 激素引发 水引发 混合处理 萌发特性 

分 类 号：S688.4[农业科学—观赏园艺]