Acta Prataculturae Sinica ›› 2021, Vol. 30 ›› Issue (3): 208-214.DOI: 10.11686/cyxb2020149
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Guang-yi LV(), Xue-bao XU, Cui-ping GAO, Zhi-hui YU, Xin-ya WANG, Cheng-jie WANG()
Received:
2020-03-31
Revised:
2020-04-16
Online:
2021-03-20
Published:
2021-03-09
Contact:
Cheng-jie WANG
Guang-yi LV, Xue-bao XU, Cui-ping GAO, Zhi-hui YU, Xin-ya WANG, Cheng-jie WANG. Effects of grazing on total nitrogen and stable nitrogen isotopes of plants and soil in different types of grasslands in Inner Mongolia[J]. Acta Prataculturae Sinica, 2021, 30(3): 208-214.
草地类型 Type of steppe | 经纬度 Longitude and latitude | 气候类型Type of climate | 年均温度 Mean annual temperature (°C) | 年均降水 Mean annual precipitation (mm) | 平均海拔Average altitude (m) | 土壤类型 Type of soil |
---|---|---|---|---|---|---|
荒漠草原 Desert steppe | 41°47' N, 111°53' E | 中温带大陆性季风气候Mid-temperate continental monsoon climate | 5.2 | 213 | 1450 | 栗钙土、黑钙土Chestnut soil, chernozemic soil |
典型草原 Typical steppe | 44°09' N, 116°20' E | 中温带半干旱大陆性季风气候Mid-temperate semi-arid continental monsoon climate | 2.9 | 236 | 1100 | 暗栗钙土Dark chestnut soil |
草甸草原 Meadow steppe | 48°43' N, 119°55' E | 中温带大陆性草原气候Mid-temperate continental steppe climate | -1.1 | 311 | 740 | 暗栗钙土、黑钙土Dark chestnut soil, chernozemic soil |
Table 1 Information of study area
草地类型 Type of steppe | 经纬度 Longitude and latitude | 气候类型Type of climate | 年均温度 Mean annual temperature (°C) | 年均降水 Mean annual precipitation (mm) | 平均海拔Average altitude (m) | 土壤类型 Type of soil |
---|---|---|---|---|---|---|
荒漠草原 Desert steppe | 41°47' N, 111°53' E | 中温带大陆性季风气候Mid-temperate continental monsoon climate | 5.2 | 213 | 1450 | 栗钙土、黑钙土Chestnut soil, chernozemic soil |
典型草原 Typical steppe | 44°09' N, 116°20' E | 中温带半干旱大陆性季风气候Mid-temperate semi-arid continental monsoon climate | 2.9 | 236 | 1100 | 暗栗钙土Dark chestnut soil |
草甸草原 Meadow steppe | 48°43' N, 119°55' E | 中温带大陆性草原气候Mid-temperate continental steppe climate | -1.1 | 311 | 740 | 暗栗钙土、黑钙土Dark chestnut soil, chernozemic soil |
指标 Index | 荒漠草原Desert steppe | 典型草原Typical steppe | 草甸草原Meadow steppe | |||
---|---|---|---|---|---|---|
无牧NG | 重度放牧HG | 无牧NG | 重度放牧HG | 无牧NG | 重度放牧HG | |
全氮TN (%) | 2.45±0.24a | 2.40±0.25a | 1.83±0.44a | 1.47±0.07a | 3.59±0.27a | 1.33±0.60b |
稳定氮同位素δ15N (‰) | 0.77±0.44a | 0.34±0.24a | -0.85±0.19a | -1.14±0.24a | 3.72±0.79a | -1.98±0.59b |
Table 2 Effects of grazing on TN and δ15N in plant roots of three steppes
指标 Index | 荒漠草原Desert steppe | 典型草原Typical steppe | 草甸草原Meadow steppe | |||
---|---|---|---|---|---|---|
无牧NG | 重度放牧HG | 无牧NG | 重度放牧HG | 无牧NG | 重度放牧HG | |
全氮TN (%) | 2.45±0.24a | 2.40±0.25a | 1.83±0.44a | 1.47±0.07a | 3.59±0.27a | 1.33±0.60b |
稳定氮同位素δ15N (‰) | 0.77±0.44a | 0.34±0.24a | -0.85±0.19a | -1.14±0.24a | 3.72±0.79a | -1.98±0.59b |
指标 Index | 荒漠草原Desert steppe | 典型草原Typical steppe | 草甸草原Meadow steppe | |||
---|---|---|---|---|---|---|
无牧NG | 重度放牧HG | 无牧NG | 重度放牧HG | 无牧NG | 重度放牧HG | |
全氮TN (%) | 0.15±0.01a | 0.14±0.01a | 0.19±0.03a | 0.18±0.02a | 0.31±0.04a | 0.13±0.01b |
稳定氮同位素 δ15N (‰) | 3.48±0.24a | 3.27±0.22a | 4.38±0.34a | 3.23±0.19b | 4.31±0.22a | 3.32±0.46b |
Table 3 Effects of grazing on soil TN and δ15N in three main steppes
指标 Index | 荒漠草原Desert steppe | 典型草原Typical steppe | 草甸草原Meadow steppe | |||
---|---|---|---|---|---|---|
无牧NG | 重度放牧HG | 无牧NG | 重度放牧HG | 无牧NG | 重度放牧HG | |
全氮TN (%) | 0.15±0.01a | 0.14±0.01a | 0.19±0.03a | 0.18±0.02a | 0.31±0.04a | 0.13±0.01b |
稳定氮同位素 δ15N (‰) | 3.48±0.24a | 3.27±0.22a | 4.38±0.34a | 3.23±0.19b | 4.31±0.22a | 3.32±0.46b |
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