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冰川冻土 ›› 2021, Vol. 43 ›› Issue (5): 1334-1343.doi: 10.7522/j.issn.1000-0240.2021.0087

• 第二次青藏高原综合科学考察研究 • 上一篇    下一篇

不同覆盖措施对高寒地区剥离的草皮块堆放温湿度及成活的影响

陈学平1(),周勇2,杨艳刚1(),陶双成1,刘磊3,刘卓成1,季双旋1   

  1. 1.交通运输部科学研究院,北京 100029
    2.西藏自治区重点公路建设项目管理中心,西藏 拉萨 85000
    3.青海省交通科学研究院,青海 西宁 73000
  • 收稿日期:2020-06-29 修回日期:2021-03-24 出版日期:2021-10-31 发布日期:2021-12-09
  • 通讯作者: 杨艳刚 E-mail:chenxueping@vip.sina.com;547309135@qq.com
  • 作者简介:陈学平,研究员,主要从事公路生态环境保护与恢复研究. E-mail: chenxueping@vip.sina.com
  • 基金资助:
    第二次青藏高原综合科学考察研究项目(2021QZKK0203);西藏自治区交通厅科技项目(XZJTKJ[2019]01)

Effects of different mulching measures on the stacking temperature, humidity and survival of stripped turf blocks in alpine regions

Xueping CHEN1(),Yong ZHOU2,Yangang YANG1(),Shuangcheng TAO1,Lei LIU3,Zhuocheng LIU1,Shuangxuan JI1   

  1. 1.Scientific Research Institute of the Ministry of Transport,Beijing 100029,China
    2.Key Highway Construction Project Management Center of Tibet Autonomous Region,Lhasa 850001,China
    3.Qinghai Research Institute of Transportation,Xining 810016,China
  • Received:2020-06-29 Revised:2021-03-24 Online:2021-10-31 Published:2021-12-09
  • Contact: Yangang YANG E-mail:chenxueping@vip.sina.com;547309135@qq.com

摘要:

重大工程建设会扰动高寒草地,法规要求扰动区草皮层应予以剥离,待工程建设后再用于恢复原生植被,当前对剥离草皮堆放成活的影响研究较少。试验设计遮阳网与穿孔膜两种覆盖条件,探讨分析其对剥离的草皮块堆放与铺植利用后土壤温湿度及草皮块返青覆盖度的影响,研究结果表明:遮阳网覆盖堆体较自然地表日均土壤温度显著降低,同时各深度层极大延长冻结期,降水对土壤水分的补充效应延后,并造成堆放期水分大量损失;穿孔膜覆盖堆体较自然地表提高了土壤温度,阻碍了降水对土壤水分的补充,并造成堆放后土壤吸持水能力降低。遮阳网覆盖的草皮块返青覆盖度显著高于穿孔膜覆盖的返青覆盖度,堆放期日平均土壤温度>0 ℃的堆放日数与草皮块返青覆盖度的线性拟合较好。工程建设中应尽量缩短堆放时长,采用透水透气类覆盖材料,增加土壤与空气热量交换,以维持更长的冻结期,并适时补充水分,提高草皮块铺植的恢复成效。

关键词: 高寒地区, 工程建设, 覆盖措施, 草皮堆放, 土壤温湿度, 返青覆盖度

Abstract:

Major engineering construction will disturb the alpine grassland. The regulations require that the turf layer in the disturbed area should be stripped and used to restore the native vegetation after the construction of the project. At present, there is little research on the survival impact of stripped turf stacking. By studying the effects of shade net and perforated film on the soil temperature and humidity and greening coverage of the stripped turf blocks after stacking and replantation, the results show that the temperature of shade net mulching stockpile is significantly lower than the daily average soil temperature of the natural ground, and greatly prolonged the freezing period of each depth layer, the supplementary effect of precipitation on soil moisture is delayed, and a large amount of water loss during the stacking period; perforated film mulching stockpile had higher soil temperature compared with the natural ground, and hinders the supplementation of soil moisture by precipitation, the soil water holding capacity is decreased; the greening coverage of the shading net mulching turf block is significantly higher than that of the perforated film. There is good linear correlation between the number of stacking days with daily average soil temperature > 0 ℃ and the greening coverage of turf blocks. The stacking time should be shortened as much as possible in the construction of engineering construction, and permeable and breathable mulching material should be used to increase the heat exchange between the soil and the air to maintain a longer freezing period, and timely add water to improve the revegetation effect of turf block replantation.

Key words: alpine regions, engineering construction, mulching measures, turf stockpile, ground temperature and humidity, greening coverage

中图分类号: 

  • U416