长期施肥对黑土水稳性团聚体稳定性及有机碳分布的影响

张秀芝,李强,高洪军,彭畅,朱平,高强

Effects of Long-Term Fertilization on the Stability of Black Soil Water Stable Aggregates and the Distribution of Organic Carbon

XiuZhi ZHANG,Qiang LI,HongJun GAO,Chang PENG,Ping ZHU,Qiang GAO

表4 土壤各级别团聚体对土壤有机碳的贡献率

Table 4 Contribution rates of different aggregate fractions to organic carbon content (%)

处理 Treatment 大团聚体Macro-aggregate 微团聚体Micro-aggregate >2 mm 2-0.25 mm 总和Sum 0.25-0.053 mm <0.053 mm 总和Sum CK 21.0 a 58.4 a 79.4 a 24.1 c 8.1 c 32.2 c NPK 16.8 b 45.8 abc 62.6 b 25.9 c 10.0 bc 35.9 bc M2 15.0 b 49.2 ab 64.2 b 25.9 c 10.1 bc 36.0 bc M2NPK 6.2 c 46.9 abc 53.1 bc 34.7 b 14.6 b 49.4 ab M4 5.5 c 42.1 bc 47.6 cd 47.0 a 13.8 b 60.8 a M4NPK 4.5 c 34.7 c 39.2 d 42.6 ab 19.6 a 62.2 a