施氮量对农田土壤有机氮组分及酶活性的影响

焦亚鹏,齐鹏,王晓娇,武均,姚一铭,蔡立群,张仁陟

Effects of Different Nitrogen Application Rates on Soil Organic Nitrogen Components and Enzyme Activities in Farmland

JIAO YaPeng,QI Peng,WANG XiaoJiao,WU Jun,YAO YiMing,CAI LiQun,ZHANG RenZhi

表1 施氮量对土壤基本化学性质的影响

Table 1 Influence of soil physical-chemical proprieties under different nitrogen level

处理 Treatment 土层 Soil layers (cm) pH 有机碳 Soil organic C (g·kg-1) 全氮 Total nitrogen (g·kg-1) 全磷 Total phosphorus (g·kg-1) C﹕N CK 0-10 8.24 ± 0.03a 8.31 ± 0.19c 0.84 ± 0.02c 0.93 ± 0.02a 9.63 ± 0.49ab 10-20 8.37 ± 0.02a 8.02 ± 0.06b 0.79 ± 0.04c 0.79 ± 0.01a 10.11 ± 0.27a 20-40 8.41 ± 0.03a 7.36 ± 0.25b 0.71 ± 0.01c 0.63 ± 0.00a 10.20 ± 0.38a N1 0-10 8.18 ± 0.02b 9.38 ± 0.12b 0.92 ± 0.03b 0.92 ± 0.00ab 9.72 ± 0.28a 10-20 8.27 ± 0.03b 8.67 ± 0.20ab 0.87 ± 0.05bc 0.79 ± 0.01ab 10.23 ± 0.2ab 20-40 8.35 ± 0.02ab 7.99 ± 0.08ab 0.79 ± 0.01b 0.61 ± 0.00b 9.95 ± 0.13ab N2 0-10 8.18 ± 0.01b 9.45 ± 0.14a 1.06 ± 0.01a 0.88 ± 0.01bc 8.73 ± 0.27bc 10-20 8.23 ± 0.04b 8.74 ± 0.30a 1.00 ± 0.04ab 0.79 ± 0.03bc 9.05 ± 0.25bc 20-40 8.31 ± 0.04bc 8.66 ± 0.14a 0.90 ± 0.02a 0.61 ± 0.01bc 9.23 ± 0.29bc N3 0-10 8.11 ± 0.01c 9.40 ± 0.06ab 1.09 ± 0.01a 0.85 ± 0.02c 8.71 ± 0.12c 10-20 8.20 ± 0.01b 8.87 ± 0.07a 1.04 ± 0.02a 0.72 ± 0.01c 8.98 ± 0.17c 20-40 8.26 ± 0.04bc 8.03 ± 0.21ab 0.91 ± 0.02a 0.58 ± 0.00c 8.91 ± 0.38c N4 0-10 8.11 ± 0.00c 9.13 ± 0.14ab 1.04 ± 0.01a 0.96 ± 0.02ab 8.77 ± 0.13c 10-20 8.11 ± 0.02c 9.01 ± 0.17a 0.95 ± 0.05ab 0.81 ± 0.00a 10.22 ± 0.26b 20-40 8.22 ± 0.01c 7.93 ± 0.01b 0.88 ± 0.01a 0.63 ± 0.01a 9.20 ± 0.12c