干旱区流动沙地建植梭梭(Haloxylon ammodendron)林后细粒物质输入对土壤碳氮积累的影响
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安芳娇, 苏永中, 牛子儒, 刘婷娜
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Effects of fine particulate matter input on soil carbon and nitrogen accumulation after establishment of Haloxylon ammodendron plantations on shifting sand dunes in arid area
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Fangjiao An, Yongzhong Su, Ziru Niu, Tingna Liu
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表1 不同固沙年限表层土壤粒级组成(%)
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Table 1 Distribution of surface soil particle size in different sand-fixation years (%)
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固沙 年限/a | 1—0.25 mm (中粗砂) | 0.25—0.1 mm (细砂) | 0.1—0.05 mm (极细砂) | 0.05—0.002 mm (粉粒) | <0.002mm (黏粒) |
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冠层下 | 冠层外 | 冠层下 | 冠层外 | 冠层下 | 冠层外 | 冠层下 | 冠层外 | 冠层下 | 冠层外 |
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0 | 11.96±2.59a | 11.96±2.59cd | 77.81±2.89a | 77.81±2.89a | 5.80±0.44d | 5.80±0.44d | 1.29±0.08c | 1.29±0.08f | 3.14±0.16c | 3.14±0.16d | 3 | 7.56±1.07d | 7.94±1.62e | 78.68±1.54a | 79.06±2.23a | 8.37±0.79c | 7.78±0.46c | 1.59±0.20c | 1.47±0.21f | 3.77±0.11c | 3.75±0.02d | 6 | 10.05±1.54abc | 14.72±2.00abc | 69.70±0.65b | 65.59±1.93b | 13.72±0.82b | 13.32±0.33b | 1.94±0.02c | 1.89±0.06e | 4.59±0.09c | 4.48±0.14cd | 11 | 10.97±0.87ab | 15.90±0.44a | 64.49±0.43c | 61.54±1.31c | 14.00±1.31b | 14.00±0.82b | 4.23±0.07b | 3.28±0.03d | 6.32±0.23b | 5.28±0.07bc | 19 | 7.67±1.64cd | 12.04±2.34bcd | 63.79±1.58c | 60.04±2.28c | 16.18±0.85a | 16.97±0.30a | 5.45±0.09a | 4.85±0.11c | 6.91±0.33b | 6.10±0.14ab | 28 | 8.47±0.48bcd | 9.49±1.89de | 63.68±2.80c | 61.31±1.15c | 14.32±1.14b | 16.96±0.93a | 5.95±0.93a | 5.19±0.23b | 7.57±1.93ab | 7.06±1.04a | 46 | 10.22±1.11abc | 14.86±2.95abc | 61.90±1.80c | 59.74±1.79c | 13.03±0.66b | 12.62±1.70b | 5.93±1.01a | 5.72±0.12a | 8.91±1.10a | 7.05±1.02a | F | 3.98 | 5.86 | 42 | 52 | 50.67 | 76.49 | 48.20 | 557.84 | 18.28 | 9.66 | P | <0.05 | <0.05 | <0.001 | <0.001 | <0.001 | <0.001 | <0.001 | <0.001 | <0.001 | <0.001 |
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