长期耕作对新疆绿洲农田土壤颗粒中有机碳和全氮含量的影响
|
|
唐光木,张云舒,徐万里,马海刚,胡克林
|
Effects of Long-Term Cultivation on Contents of Organic Carbon and Total Nitrogen in Soil Particulate Fraction in Oasis Farmland of Xinjiang
|
|
TANG GuangMu,ZHANG YunShu,XU WanLi,MA HaiGang,HU KeLin
|
|
表3 不同耕作年限土壤及其颗粒组分碳氮比
|
Table 3 C﹕N ratio of soil its fractions in different tillage years
|
|
采样区
Sampling site | 耕作年限
Tillage year （a） | 土壤碳氮比
C/N | 颗粒组分碳氮比C/N in particle fractions | | 砂粒Sand (>50 μm) | 粉粒Silt (2-50 μm) | 黏粒Clay (<2 μm) | 兰州湾
Lanzhouwan | 0 | 3.55±0.97b | 6.14±0.12bc | 2.82±0.55b | 4.41±0.21bc | | 5 | 5.46±0.70a | 12.22±0.57a | 5.72±0.62a | 4.16±0.20c | | 10 | 5.24±0.78a | 7.81±0.76b | 6.16±0.39a | 4.00±0.52c | | 15 | 5.23±0.86a | 4.32±0.39cd | 5.08±0.93a | 6.00±0.27a | | 20 | 4.77±0.95ab | 3.28±0.65d | 5.71±0.59a | 5.16±0.25ab | 31团
31 corps | 0 | 2.61±0.36b | 18.16±0.18a | 1.94±0.72c | 3.46±0.21d | | 5 | 6.34±0.62a | 9.43±0.35b | 8.16±0.56b | 4.46±0.80c | | 10 | 6.14±0.73a | 7.12±0.81c | 9.71±0.92ab | 3.88±0.46cd | | 15 | 6.10±0.40a | 5.23±0.51cd | 8.77±0.64ab | 5.17±0.21b | | 20 | 6.31±0.38a | 3.89±1.01d | 8.12±0.50b | 6.53±0.35a | 普惠农场
Puhui farm | 0 | 3.72±0.48c | 10.14±0.44a | 3.28±0.17b | 3.38±0.30d | | 5 | 5.22±0.32ab | 8.07±0.97b | 5.85±0.56a | 4.07±0.33c | | 10 | 4.78±0.46b | 4.78±0.14c | 5.60±0.53a | 3.96±0.27c | | 15 | 5.43±0.58ab | 4.88±0.81c | 5.86±0.79a | 5.59±0.24b | | 20 | 5.54±0.73a | 3.88±0.23b | 5.84±0.87a | 8.41±0.47a |
|
|
|