草业学报 ›› 2023, Vol. 32 ›› Issue (11): 179-187.DOI: 10.11686/cyxb2022493
• 研究论文 • 上一篇
曲文杰1,2,3,4(), 赵文智1, 王磊2,3, 屈建军1, 杨新国2,3(
)
收稿日期:
2022-12-15
修回日期:
2023-01-13
出版日期:
2023-11-20
发布日期:
2023-09-27
通讯作者:
杨新国
作者简介:
E-mail: xinguoyang1976@163.com基金资助:
Wen-jie QU1,2,3,4(), Wen-zhi ZHAO1, Lei WANG2,3, Jian-jun QU1, Xin-guo YANG2,3(
)
Received:
2022-12-15
Revised:
2023-01-13
Online:
2023-11-20
Published:
2023-09-27
Contact:
Xin-guo YANG
摘要:
降水稀少、不可预测及其所带来的干湿变化深刻影响着旱区植物种子萌发和幼苗定居过程。柠条和花棒是腾格里沙漠常见的并广泛用于沙漠化治理的两种典型旱生灌木,本研究采用室内模拟干湿处理的方法对比分析了两者种子萌发率和幼苗复活的响应。结果表明,与CK相比,湿润-干旱处理显著提高了柠条种子的萌发率(P<0.05),而对花棒种子的萌发率无显著影响,同时显著提高了柠条种子第1天的萌发率(27.99%, P<0.05)和花棒种子第2天的萌发率(46.88%, P<0.05)。干旱复水处理的花棒早期幼苗平均复活率高于柠条。根长为0~0.2 cm的柠条和花棒早期幼苗遭受45 d干旱后都可复活。根长为0.5~1.0 cm的柠条和花棒早期幼苗的干旱不归点分别是21和45 d;根长为1.0~1.5 cm时不归点分别是7和14 d。总体而言,干湿处理有利于种子萌发,但是随幼苗生长,对干旱的耐受程度也随之降低;相对而言,花棒对持续干旱的适应性要强于柠条。在长期气候变化背景下,建议研究区人工固沙植被可以更多选择花棒一类的灌木,从而提高固沙植被的相对稳定性。
曲文杰, 赵文智, 王磊, 屈建军, 杨新国. 两种旱生灌木种子萌发与幼苗复活对模拟干湿处理的响应[J]. 草业学报, 2023, 32(11): 179-187.
Wen-jie QU, Wen-zhi ZHAO, Lei WANG, Jian-jun QU, Xin-guo YANG. Response of germination and seedling survival of two shrubs to simulated dry-wet treatments[J]. Acta Prataculturae Sinica, 2023, 32(11): 179-187.
物种 Species | 长 Length (mm) | 宽 Width (mm) | 面积 Area (mm2) | 周长 Perimeter (mm) | 直径 Diameter (mm) | 长宽比 Length/width | 圆度 Circularity | 千粒重 Thousand seed weight (g) |
---|---|---|---|---|---|---|---|---|
柠条C. korshinskii | 7.85±0.51 | 4.30±0.30 | 26.51±2.94 | 25.06±1.69 | 5.80±0.32 | 1.86±0.15 | 1.20±0.04 | 65.83±2.54 |
花棒C. scoparium | 6.81±0.53 | 4.67±0.30 | 22.91±2.49 | 22.57±1.40 | 5.39±0.30 | 1.48±0.13 | 1.13±0.06 | 30.20±1.79 |
表1 柠条、花棒种子形态指标
Table 1 Seed morphological indexes of C. korshinskii and C. scoparium (mean±SD)
物种 Species | 长 Length (mm) | 宽 Width (mm) | 面积 Area (mm2) | 周长 Perimeter (mm) | 直径 Diameter (mm) | 长宽比 Length/width | 圆度 Circularity | 千粒重 Thousand seed weight (g) |
---|---|---|---|---|---|---|---|---|
柠条C. korshinskii | 7.85±0.51 | 4.30±0.30 | 26.51±2.94 | 25.06±1.69 | 5.80±0.32 | 1.86±0.15 | 1.20±0.04 | 65.83±2.54 |
花棒C. scoparium | 6.81±0.53 | 4.67±0.30 | 22.91±2.49 | 22.57±1.40 | 5.39±0.30 | 1.48±0.13 | 1.13±0.06 | 30.20±1.79 |
图1 湿润-干旱处理对柠条和花棒种子萌发率的影响Estimates代表处理组与CK的差异,0代表CK萌发率,*代表处理组与CK是否有显著性,* 0.01<P<0.05,** 0.001<P<0.01,*** P<0.001。下同。Estimates represented the difference between the treatment group and CK, 0 represents germination of CK. * represents whether the treatment group and CK were significant. The same below.
Fig.1 Effects of wet-dry treatment on seed germination of C. korshinskii and C. scoparium
图4 不同等级根长和不同干旱处理幼苗复活天数不同小写字母代表不同处理之间差异显著(P<0.05)。The different lowercase letters represent significant differences among different treatments.
Fig.4 Seedling revival days at different root length and different drying treatments
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