Acta Prataculturae Sinica ›› 2026, Vol. 35 ›› Issue (1): 65-78.DOI: 10.11686/cyxb2025073
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Wen-hui DENG1(
), Ke-chen SONG1, Hao ZHANG1, Si-yu GUAN1, Jia-yi YONG1, Tie-na XIE2, Hai-ying HU1(
)
Received:2025-03-06
Revised:2025-04-21
Online:2026-01-20
Published:2025-11-13
Contact:
Hai-ying HU
Wen-hui DENG, Ke-chen SONG, Hao ZHANG, Si-yu GUAN, Jia-yi YONG, Tie-na XIE, Hai-ying HU. Effects of changes in precipitation on stomatal morphology and photosynthetic and physiological characteristics of major species in desert steppe plant communities[J]. Acta Prataculturae Sinica, 2026, 35(1): 65-78.
土层深度 Soil depth (cm) | 容重 Bulk density (g·cm-3) | 田间持水量 Field capacity (g·kg-1) | pH | 无机碳含量 Inorganic carbon content (g·kg-1) |
|---|---|---|---|---|
| 0~15 | 1.43 | 18.75 | 8.86 | 7.61 |
| 15~30 | 1.42 | 19.79 | 8.86 | 8.13 |
| 30~45 | 1.47 | 19.19 | 8.74 | 12.38 |
Table 1 Basic soil characteristics of the test site
土层深度 Soil depth (cm) | 容重 Bulk density (g·cm-3) | 田间持水量 Field capacity (g·kg-1) | pH | 无机碳含量 Inorganic carbon content (g·kg-1) |
|---|---|---|---|---|
| 0~15 | 1.43 | 18.75 | 8.86 | 7.61 |
| 15~30 | 1.42 | 19.79 | 8.86 | 8.13 |
| 30~45 | 1.47 | 19.19 | 8.74 | 12.38 |
物种 Species | 科 Family | 生活型 Life style | 根系类型 Root type | 重要值Important value | 生物量Biomass (g·m-2) | ||||
|---|---|---|---|---|---|---|---|---|---|
| PA | CK | PR | PA | CK | PR | ||||
| 短花针茅S.breviflora | 禾本科Gramineae | 多年生草本Perennial herb | 须根系Fibrous root system | 0.81 | 0.95 | 0.89 | 134.31 | 90.81 | 25.97 |
| 银灰旋花C. ammannii | 旋花科Convolvulaceae | 多年生草本Perennial herb | 直根系Straight root system | 0.10 | 0.27 | 0.28 | 10.66 | 17.20 | 5.21 |
| 牛枝子L. potaninii | 豆科Leguminosae | 半灌木Semi-shrubs | 须根系Fibrous root system | 0.36 | 0.18 | 0.11 | 8.37 | 3.63 | 0.22 |
| 赖草L. secalinus | 禾本科Gramineae | 多年生草本Perennial herb | 须根系Fibrous root system | 0.54 | 0.67 | 0.45 | 2.10 | 2.96 | 2.07 |
| 远志P. tenuifolia | 远志科Polygalaceae | 多年生草本Perennial herb | 直根系Straight root system | 0.18 | 0.12 | 0.20 | 2.36 | 1.06 | 0.32 |
| 猪毛菜Salsola collina | 苋科Amaranthaceae | 一年生草本Annual herb | 直根系Straight root system | 0.22 | 0.06 | 0.03 | 0.75 | 0.43 | 0.83 |
| 狭叶米口袋Gueldenstaedtia verna | 豆科Leguminosae | 多年生草本Perennial herb | 直根系Straight root system | 0.11 | 0.04 | 0.04 | 0.16 | 0.36 | 0.02 |
| 骆驼蒿Peganum nigellastrum | 白刺科Nitrariaceae | 多年生草本Perennial herb | 须根系Fibrous root system | 0.10 | 0.14 | 0.22 | 1.73 | 0.67 | 1.40 |
| 老瓜头Vincetoxicum mongolicum | 夹竹桃科Apocynaceae | 多年生草本Perennial herb | 须根系Fibrous root system | 0.18 | 0.04 | 0.00 | 0.43 | 0.43 | 0.00 |
| 阿尔泰狗娃花Aster altaicus | 菊科Compositae | 多年生草本Perennial herb | 须根系Fibrous root system | 0.00 | 0.08 | 0.07 | 0.00 | 0.00 | 0.00 |
| 二裂委陵菜Sibbaldianthe bifurca | 蔷薇科Rosaceae | 多年生草本Perennial herb | 直根系Straight root system | 0.08 | 0.08 | 0.20 | 0.22 | 0.02 | 0.00 |
| 砂针棘豆Oxytropis racemosa | 豆科Leguminosae | 多年生草本Perennial herb | 直根系Straight root system | 0.08 | 0.09 | 0.06 | 0.83 | 0.16 | 0.37 |
| 白草Pennisetum flaccidum | 禾本科Gramineae | 多年生草本Perennial herb | 须根系Fibrous root system | 0.00 | 0.12 | 0.00 | 0.00 | 0.00 | 0.00 |
| 猫头刺Oxytropis aciphylla | 豆科Leguminosae | 半灌木Semi-shrubs | 直根系Straight root system | 0.00 | 0.08 | 0.09 | 0.29 | 0.00 | 0.65 |
Table 2 Species composition characteristics and biomass of plant communities
物种 Species | 科 Family | 生活型 Life style | 根系类型 Root type | 重要值Important value | 生物量Biomass (g·m-2) | ||||
|---|---|---|---|---|---|---|---|---|---|
| PA | CK | PR | PA | CK | PR | ||||
| 短花针茅S.breviflora | 禾本科Gramineae | 多年生草本Perennial herb | 须根系Fibrous root system | 0.81 | 0.95 | 0.89 | 134.31 | 90.81 | 25.97 |
| 银灰旋花C. ammannii | 旋花科Convolvulaceae | 多年生草本Perennial herb | 直根系Straight root system | 0.10 | 0.27 | 0.28 | 10.66 | 17.20 | 5.21 |
| 牛枝子L. potaninii | 豆科Leguminosae | 半灌木Semi-shrubs | 须根系Fibrous root system | 0.36 | 0.18 | 0.11 | 8.37 | 3.63 | 0.22 |
| 赖草L. secalinus | 禾本科Gramineae | 多年生草本Perennial herb | 须根系Fibrous root system | 0.54 | 0.67 | 0.45 | 2.10 | 2.96 | 2.07 |
| 远志P. tenuifolia | 远志科Polygalaceae | 多年生草本Perennial herb | 直根系Straight root system | 0.18 | 0.12 | 0.20 | 2.36 | 1.06 | 0.32 |
| 猪毛菜Salsola collina | 苋科Amaranthaceae | 一年生草本Annual herb | 直根系Straight root system | 0.22 | 0.06 | 0.03 | 0.75 | 0.43 | 0.83 |
| 狭叶米口袋Gueldenstaedtia verna | 豆科Leguminosae | 多年生草本Perennial herb | 直根系Straight root system | 0.11 | 0.04 | 0.04 | 0.16 | 0.36 | 0.02 |
| 骆驼蒿Peganum nigellastrum | 白刺科Nitrariaceae | 多年生草本Perennial herb | 须根系Fibrous root system | 0.10 | 0.14 | 0.22 | 1.73 | 0.67 | 1.40 |
| 老瓜头Vincetoxicum mongolicum | 夹竹桃科Apocynaceae | 多年生草本Perennial herb | 须根系Fibrous root system | 0.18 | 0.04 | 0.00 | 0.43 | 0.43 | 0.00 |
| 阿尔泰狗娃花Aster altaicus | 菊科Compositae | 多年生草本Perennial herb | 须根系Fibrous root system | 0.00 | 0.08 | 0.07 | 0.00 | 0.00 | 0.00 |
| 二裂委陵菜Sibbaldianthe bifurca | 蔷薇科Rosaceae | 多年生草本Perennial herb | 直根系Straight root system | 0.08 | 0.08 | 0.20 | 0.22 | 0.02 | 0.00 |
| 砂针棘豆Oxytropis racemosa | 豆科Leguminosae | 多年生草本Perennial herb | 直根系Straight root system | 0.08 | 0.09 | 0.06 | 0.83 | 0.16 | 0.37 |
| 白草Pennisetum flaccidum | 禾本科Gramineae | 多年生草本Perennial herb | 须根系Fibrous root system | 0.00 | 0.12 | 0.00 | 0.00 | 0.00 | 0.00 |
| 猫头刺Oxytropis aciphylla | 豆科Leguminosae | 半灌木Semi-shrubs | 直根系Straight root system | 0.00 | 0.08 | 0.09 | 0.29 | 0.00 | 0.65 |
物种 Species | 处理 Treatment | 气孔长宽比 Stomatal aspect ratio | 气孔密度 Stomatal density (No.·mm-2) | 气孔周长 Stomatal circumference (μm) | 气孔面积 Stomatal area (μm2) |
|---|---|---|---|---|---|
短花针茅 S. breviflora | PA | 1.23±0.03b | 160.67±0.62c | 271.27±6.59a | 4.38±0.11a |
| CK | 1.32±0.02b | 220.32±0.82b | 109.18±3.24b | 2.42±0.08b | |
| PR | 1.51±0.06a | 309.32±2.50a | 59.50±3.66c | 1.90±0.13c | |
赖草 L. secalinus | PA | 2.35±0.04a | 37.03±0.78b | 441.41±14.75a | 1.63±0.06a |
| CK | 1.87±0.03c | 89.24±1.00a | 160.02±3.32c | 1.43±0.04b | |
| PR | 1.98±0.03b | 90.45±0.74a | 188.09±4.27b | 1.70±0.04a | |
牛枝子 L. potaninii | PA | 2.34±0.05a | 146.58±1.56a | 88.14±2.32a | 1.30±0.04a |
| CK | 1.82±0.03c | 112.13±1.04b | 89.37±1.87a | 1.01±0.02b | |
| PR | 2.02±0.04b | 93.16±0.28c | 83.71±2.03a | 0.78±0.02c | |
远志 P. tenuifolia | PA | 1.62±0.03b | 70.70±0.86c | 393.83±8.26a | 2.78±0.07b |
| CK | 1.65±0.03b | 84.37±0.79b | 384.25±7.10a | 3.24±0.07a | |
| PR | 1.75±0.03a | 110.32±0.78a | 305.54±8.25b | 3.37±0.09a | |
银灰旋花 C. ammannii | PA | 1.63±0.06ab | 219.87±0.69a | 194.38±9.48a | 4.27±0.20a |
| CK | 1.69±0.06a | 196.97±1.20b | 179.72±11.18a | 3.53±0.21b | |
| PR | 1.50±0.04b | 152.69±2.12c | 62.64±3.97b | 0.96±0.07c |
Table 3 Effects of precipitation changes on leaf stomatal morphological parameters of major plants in the community
物种 Species | 处理 Treatment | 气孔长宽比 Stomatal aspect ratio | 气孔密度 Stomatal density (No.·mm-2) | 气孔周长 Stomatal circumference (μm) | 气孔面积 Stomatal area (μm2) |
|---|---|---|---|---|---|
短花针茅 S. breviflora | PA | 1.23±0.03b | 160.67±0.62c | 271.27±6.59a | 4.38±0.11a |
| CK | 1.32±0.02b | 220.32±0.82b | 109.18±3.24b | 2.42±0.08b | |
| PR | 1.51±0.06a | 309.32±2.50a | 59.50±3.66c | 1.90±0.13c | |
赖草 L. secalinus | PA | 2.35±0.04a | 37.03±0.78b | 441.41±14.75a | 1.63±0.06a |
| CK | 1.87±0.03c | 89.24±1.00a | 160.02±3.32c | 1.43±0.04b | |
| PR | 1.98±0.03b | 90.45±0.74a | 188.09±4.27b | 1.70±0.04a | |
牛枝子 L. potaninii | PA | 2.34±0.05a | 146.58±1.56a | 88.14±2.32a | 1.30±0.04a |
| CK | 1.82±0.03c | 112.13±1.04b | 89.37±1.87a | 1.01±0.02b | |
| PR | 2.02±0.04b | 93.16±0.28c | 83.71±2.03a | 0.78±0.02c | |
远志 P. tenuifolia | PA | 1.62±0.03b | 70.70±0.86c | 393.83±8.26a | 2.78±0.07b |
| CK | 1.65±0.03b | 84.37±0.79b | 384.25±7.10a | 3.24±0.07a | |
| PR | 1.75±0.03a | 110.32±0.78a | 305.54±8.25b | 3.37±0.09a | |
银灰旋花 C. ammannii | PA | 1.63±0.06ab | 219.87±0.69a | 194.38±9.48a | 4.27±0.20a |
| CK | 1.69±0.06a | 196.97±1.20b | 179.72±11.18a | 3.53±0.21b | |
| PR | 1.50±0.04b | 152.69±2.12c | 62.64±3.97b | 0.96±0.07c |
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