Chin J Plant Ecol ›› 2021, Vol. 45 ›› Issue (7): 760-770.DOI: 10.17521/cjpe.2020.0420
Special Issue: 生态化学计量
• Research Articles • Previous Articles Next Articles
Received:
2020-12-17
Accepted:
2021-05-17
Online:
2021-07-20
Published:
2021-10-22
Contact:
ZHUANG Wei-Wei
Supported by:
HOU Bao-Lin, ZHUANG Wei-Wei. Nitrogen uptake strategy of annual plants in Gurbantünggüt Desert[J]. Chin J Plant Ecol, 2021, 45(7): 760-770.
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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2020.0420
土壤组成成分含量 Soil composition content | 六月 June | 七月 July | ||
---|---|---|---|---|
土壤深度 Soil depth (cm) | 土壤深度 Soil depth (cm) | |||
0-5 | 5-15 | 0-5 | 5-15 | |
土壤有机碳 Soil organic C (%) | 2.20 ± 0.26 | 1.40 ± 0.10 | 2.37 ± 0.31 | 1.63 ± 0.21 |
总氮 Total N (%) | 0.159 ± 0.008 | 0.086 ± 0.011 | 0.188 ± 0.030 | 0.091 ± 0.007 |
NH4+-N (μg·g-1) | 12.563 ± 0.897 | 10.150 ± 1.697 | 13.800 ± 1.456 | 9.783 ± 1.262 |
NO3--N (μg·g-1) | 22.357 ± 3.446 | 18.587 ± 1.216 | 23.597 ± 3.118 | 17.407 ± 2.298 |
有机氮 Organic N (μg·g-1) | 12.747 ± 2.034 | 11.217 ± 1.216 | 12.717 ± 1.975 | 11.210 ± 1.800 |
Table 1 Composition analysis of soil samples at various soil depths in different months of Gurbantünggüt Desert (mean ± SD)
土壤组成成分含量 Soil composition content | 六月 June | 七月 July | ||
---|---|---|---|---|
土壤深度 Soil depth (cm) | 土壤深度 Soil depth (cm) | |||
0-5 | 5-15 | 0-5 | 5-15 | |
土壤有机碳 Soil organic C (%) | 2.20 ± 0.26 | 1.40 ± 0.10 | 2.37 ± 0.31 | 1.63 ± 0.21 |
总氮 Total N (%) | 0.159 ± 0.008 | 0.086 ± 0.011 | 0.188 ± 0.030 | 0.091 ± 0.007 |
NH4+-N (μg·g-1) | 12.563 ± 0.897 | 10.150 ± 1.697 | 13.800 ± 1.456 | 9.783 ± 1.262 |
NO3--N (μg·g-1) | 22.357 ± 3.446 | 18.587 ± 1.216 | 23.597 ± 3.118 | 17.407 ± 2.298 |
有机氮 Organic N (μg·g-1) | 12.747 ± 2.034 | 11.217 ± 1.216 | 12.717 ± 1.975 | 11.210 ± 1.800 |
Fig. 1 Above and below ground biomass of two species in Gurbantünggüt Desert (mean ± SD). Different uppercase letters indicate significant differences (p < 0.05) among different months for the same level (above or below ground); different lowercase letters indicate significant differences (p < 0.05) between different levels in the same month.
Fig. 2 Shoot-to-root ratio of two species in Gurbantünggüt Desert in June and July (mean ± SD). Different uppercase letters indicate significant differences (p < 0.05) between different growing seasons for the same level (above or below ground); different lowercase letters indicate significant differences (p < 0.05) between different levels in the same growing season.
影响因子 Effect indicator | df | F | p |
---|---|---|---|
物种 Species | 1 | 21.042 | <0.001 |
氮形态 N form | 2 | 98.604 | <0.001 |
土壤深度 Soil depth | 1 | 22.728 | <0.001 |
月份 Month | 1 | 4.110 | 0.048 |
物种×氮形态 Species × N form | 2 | 55.760 | <0.001 |
物种×土壤深度 Species × Soil depth | 1 | 0.035 | 0.852 |
物种×月份 Species × Month | 1 | 0.106 | 0.746 |
氮形态×土壤深度 N form × Soil depth | 2 | 5.956 | 0.005 |
氮形态×月份 N form × Month | 2 | 0.823 | 0.445 |
土壤深度×月份 Soil depth × Month | 1 | 6.813 | 0.012 |
物种×氮形态×土壤深度 Species × N form × Soil depth | 2 | 0.583 | 0.562 |
物种×氮形态×月份 Species × N form × Month | 2 | 0.883 | 0.420 |
物种×土壤深度×月份 Species × Soil depth × Month | 1 | 0.356 | 0.554 |
氮形态×土壤深度×月份 N form × Soil depth × Month | 2 | 0.499 | 0.611 |
物种×氮形态×土壤深度×月份 Species × N form × Soil depth × Month | 2 | 2.424 | 0.099 |
Table 2 Four-way ANOVA analysis for the effects of species, month, nitrogen (N) form, soil depth, and their interactions on nitrogen uptake rate by plants
影响因子 Effect indicator | df | F | p |
---|---|---|---|
物种 Species | 1 | 21.042 | <0.001 |
氮形态 N form | 2 | 98.604 | <0.001 |
土壤深度 Soil depth | 1 | 22.728 | <0.001 |
月份 Month | 1 | 4.110 | 0.048 |
物种×氮形态 Species × N form | 2 | 55.760 | <0.001 |
物种×土壤深度 Species × Soil depth | 1 | 0.035 | 0.852 |
物种×月份 Species × Month | 1 | 0.106 | 0.746 |
氮形态×土壤深度 N form × Soil depth | 2 | 5.956 | 0.005 |
氮形态×月份 N form × Month | 2 | 0.823 | 0.445 |
土壤深度×月份 Soil depth × Month | 1 | 6.813 | 0.012 |
物种×氮形态×土壤深度 Species × N form × Soil depth | 2 | 0.583 | 0.562 |
物种×氮形态×月份 Species × N form × Month | 2 | 0.883 | 0.420 |
物种×土壤深度×月份 Species × Soil depth × Month | 1 | 0.356 | 0.554 |
氮形态×土壤深度×月份 N form × Soil depth × Month | 2 | 0.499 | 0.611 |
物种×氮形态×土壤深度×月份 Species × N form × Soil depth × Month | 2 | 2.424 | 0.099 |
Fig. 3 Effects of species, nitrogen (N) morphology, soil depth and month on nitrogen uptake rate of Ceratocarpus arenarius (A, B) and Suaeda glauca (C, D) in Gurbantünggüt Desert (mean ± SD). Different uppercase letters indicate significant differences (p < 0.05) among the three forms in the same month and soil depth; different lowercase letters indicate significant differences (p < 0.05) between the two soil depths for the same species and nitrogen form.
Fig. 4 Total nitrogen uptake rates of Ceratocarpus arenarius (A) and Suaeda glauca (B) in Gurbantünggüt Desert in June and July (mean ± SD). Different uppercase letters indicate significant differences (p < 0.05) between different species at the same soil depth, and different lowercase letters indicate significant differences (p < 0.05) between different soil depths in the same month for the same species.
Fig. 5 Contribution rate (%) of nitrate-nitrogen, ammonia-nitrogen and glycine to the total nitrogen uptake of two annual plant species in Gurbantünggüt Desert. The area surrounded by the black solid line refers to June, while the shaded area refers to July.
回收率 Recovery (%) | 角果藜 Ceratocarpus arenarius | |||
---|---|---|---|---|
6月 June | 7月 July | |||
土壤深度 Soil depth (cm) | 土壤深度 Soil depth (cm) | |||
0-5 | 5-15 | 0-5 | 5-15 | |
15N-NO3- | 0.330 ± 0.070Aab | 0.323 ± 0.057Aab | 0.423 ± 0.074Aa | 0.270 ± 0.036Ab |
15N-NH4+ | 0.313 ± 0.048Aab | 0.223 ± 0.042Bb | 0.337 ± 0.051ABa | 0.260 ± 0.046Aab |
15N-Glyc | 0.193 ± 0.029Ba | 0.190 ± 0.036Ba | 0.237 ± 0.038Ba | 0.227 ± 0.032Aa |
回收率 Recovery (%) | 碱蓬 Suaeda glauca | |||
6月 June | 7月 July | |||
土壤深度 Soil depth (cm) | 土壤深度 Soil depth (cm) | |||
0-5 | 5-15 | 0-5 | 5-15 | |
15N-NO3- | 0.420 ± 0.036Aab | 0.290 ± 0.050Bc | 0.503 ± 0.067Aa | 0.327 ± 0.060ABbc |
15N-NH4+ | 0.487 ± 0.116Aa | 0.493 ± 0.071Aa | 0.527 ± 0.047Aa | 0.410 ± 0.044Aa |
15N-Glyc | 0.187 ± 0.021Bb | 0.237 ± 0.051Bab | 0.287 ± 0.055Ba | 0.240 ± 0.036Bab |
Table 3 15N recovery of two annual plants in Gurbantünggüt Desert (%)(mean ± SD)
回收率 Recovery (%) | 角果藜 Ceratocarpus arenarius | |||
---|---|---|---|---|
6月 June | 7月 July | |||
土壤深度 Soil depth (cm) | 土壤深度 Soil depth (cm) | |||
0-5 | 5-15 | 0-5 | 5-15 | |
15N-NO3- | 0.330 ± 0.070Aab | 0.323 ± 0.057Aab | 0.423 ± 0.074Aa | 0.270 ± 0.036Ab |
15N-NH4+ | 0.313 ± 0.048Aab | 0.223 ± 0.042Bb | 0.337 ± 0.051ABa | 0.260 ± 0.046Aab |
15N-Glyc | 0.193 ± 0.029Ba | 0.190 ± 0.036Ba | 0.237 ± 0.038Ba | 0.227 ± 0.032Aa |
回收率 Recovery (%) | 碱蓬 Suaeda glauca | |||
6月 June | 7月 July | |||
土壤深度 Soil depth (cm) | 土壤深度 Soil depth (cm) | |||
0-5 | 5-15 | 0-5 | 5-15 | |
15N-NO3- | 0.420 ± 0.036Aab | 0.290 ± 0.050Bc | 0.503 ± 0.067Aa | 0.327 ± 0.060ABbc |
15N-NH4+ | 0.487 ± 0.116Aa | 0.493 ± 0.071Aa | 0.527 ± 0.047Aa | 0.410 ± 0.044Aa |
15N-Glyc | 0.187 ± 0.021Bb | 0.237 ± 0.051Bab | 0.287 ± 0.055Ba | 0.240 ± 0.036Bab |
Fig. 6 Differences in the ratio of 13C and 15N per mole atomic percentage in the roots of Ceratocarpus arenarius (A) and Suaeda glauca (B)(mean ± SD).
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