草业学报 ›› 2021, Vol. 30 ›› Issue (8): 12-24.DOI: 10.11686/cyxb2020280
贺翔(), 白梅梅, 徐长林, 宋美娟, 汪鹏斌, 鱼小军()
收稿日期:
2020-06-22
修回日期:
2020-10-10
出版日期:
2021-07-09
发布日期:
2021-07-09
通讯作者:
鱼小军
作者简介:
Corresponding author. E-mail: yuxj@gsau.edu.cn基金资助:
Xiang HE(), Mei-mei BAI, Chang-lin XU, Mei-juan SONG, Peng-bin WANG, Xiao-jun YU()
Received:
2020-06-22
Revised:
2020-10-10
Online:
2021-07-09
Published:
2021-07-09
Contact:
Xiao-jun YU
摘要:
科学评价灌丛草地自然恢复演替特征,以期为灌丛草地的生态修复和可持续利用提供理论依据。采用“空间代替时间”的方法,研究了东祁连山小叶金露梅+杯腺柳灌丛植被碳储量和土壤理化性质对自然恢复演替的响应。结果表明,随着小叶金露梅+杯腺柳灌丛恢复演替期的延长(约20年),灌丛群落碳储量增加1.2~3.8倍;丛间土壤呼吸速率增大1.1~2.0倍,丛内保持不变;丛间和丛内土壤含水量减小1.0~1.5倍,容重增大1.0~2.0倍;丛间和丛内土壤有机质、速效氮和速效磷含量均呈先增后减的单峰曲线,其含量先增加2.0%~48.7%,后减少4.4%~32.0%,全磷和全钾含量增加3.0%~76.0%,其他养分含量变化各异。随着灌丛草地植被的恢复演替,草地碳储量增加,但土壤理化性质受负面影响。故建议积极探寻实现草地生态系统高效、平衡和持续发展的途径,使灌木和草本植物协调共生、和谐生长,稳定生态系统平衡,提高草牧业生产能力和增加农牧民经济收入。
贺翔, 白梅梅, 徐长林, 宋美娟, 汪鹏斌, 鱼小军. 东祁连山小叶金露梅+杯腺柳灌丛草地植被和土壤对其自然恢复演替的响应[J]. 草业学报, 2021, 30(8): 12-24.
Xiang HE, Mei-mei BAI, Chang-lin XU, Mei-juan SONG, Peng-bin WANG, Xiao-jun YU. Soil and vegetation successional responses in natural restoration of mixed Potentilla parvifolia-Salix cupularis shrubland in the Eastern Qilian Mountains[J]. Acta Prataculturae Sinica, 2021, 30(8): 12-24.
植被恢复演替阶段 Vegetation recovery stage | 地理坐标 Geographic coordinates | 海拔 Altitude (m) | 盖度 Coverage (%) | 高度 Height (cm) | 冠幅 Crown width (cm×cm) | 地上生物量Aboveground biomass (g·m-2) |
---|---|---|---|---|---|---|
未恢复期 No recovery stages (NR) | 37°15′9.31″ N 102°34′45.18″ E | 3348 | <20 | <45 | <45×55 | <460 |
恢复初期 Initial stages of restoration (IR) | 37°14′54.37″ N 102°34′51.52″ E | 3338 | 21~30 | 46~90 | 46×56~95×105 | 461~800 |
恢复中期 Middle stages of restoration (MR) | 37°15′5.28″ N 102°34′47.38″ E | 3344 | 31~40 | 91~135 | 96×106~145×155 | 801~1200 |
恢复后期 Late stages of restoration (LR) | 37°14′59.54″ N 102°34′50.43″ E | 3341 | >40 | >135 | >145×155 | >1200 |
表 1 试验样地基本情况
Table 1 The basic situations of research plots
植被恢复演替阶段 Vegetation recovery stage | 地理坐标 Geographic coordinates | 海拔 Altitude (m) | 盖度 Coverage (%) | 高度 Height (cm) | 冠幅 Crown width (cm×cm) | 地上生物量Aboveground biomass (g·m-2) |
---|---|---|---|---|---|---|
未恢复期 No recovery stages (NR) | 37°15′9.31″ N 102°34′45.18″ E | 3348 | <20 | <45 | <45×55 | <460 |
恢复初期 Initial stages of restoration (IR) | 37°14′54.37″ N 102°34′51.52″ E | 3338 | 21~30 | 46~90 | 46×56~95×105 | 461~800 |
恢复中期 Middle stages of restoration (MR) | 37°15′5.28″ N 102°34′47.38″ E | 3344 | 31~40 | 91~135 | 96×106~145×155 | 801~1200 |
恢复后期 Late stages of restoration (LR) | 37°14′59.54″ N 102°34′50.43″ E | 3341 | >40 | >135 | >145×155 | >1200 |
图 1 小叶金露梅+杯腺柳灌丛碳储量动态变化NR、IR、MR和LR分别代表未恢复期、恢复初期、恢复中期和恢复后期;不同小写字母表示不同恢复期之间差异显著(P<0.05),下同。NR, IR, MR and LR represent no recovery stages, initial stages of restoration, middle stages of restoration and late stages of restoration respectively. Different lowercase letters indicate significant differences among different treatments at the 0.05 level, the same below.
Fig.1 Dynamic changes in the carbon storage of P. parvifolia+S. cupularis shrubland
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