长期定位施肥对土壤有机质、不同形态氮含量及作物产量的影响

刘学彤, 郑春莲, 曹薇, 党红凯, 曹彩云, 李晓爽, 李科江, 马俊永

Effects of Long-Term Located Fertilization on Soil Organic Matter, Nitrogen Forms and Crop Yields

Liu Xuetong, Zheng Chunlian, Cao Wei, Dang Hongkai, Cao Caiyun, Li Xiaoshuang, Li Kejiang, Ma Junyong

表2 不同处理表层（0~20cm）土壤不同形态氮含量及占全氮的百分比

Table 2 Contents of different kinds of soil N and their percentages of total N in different treatments in soil layer (0-20cm)

处理 Treatment 各形态氮含量Contents of different kinds of soil N (mg/kg) 占全氮百分比Percentage in total N (%) 碱解氮AHN 硝态氮NO3--N 铵态氮NH4+-N 碱解氮AHN 硝态氮NO3--N 铵态氮NH4+-N CK 51.0±1.7e 1.3±0.2d 2.5±0.6a 5.7 0.14 0.28 N180+P120 64.3±6.6cd 7.8±0.3bcd 2.4±0.4a 6.4 0.78 0.24 N360+P240 67.5±6.4cd 8.0±0.9bcd 2.2±0.4a 6.2 0.73 0.20 N540+P360 80.3±2.9ab 15.3±10.4ab 2.8±0.9a 6.4 1.22 0.22 S9000 62.8±6.4d 2.8±1.7cd 2.8±0.8a 6.0 0.27 0.26 N180+P120+S9000 72.3±4.2bc 10.1±0.5abc 2.3±0.7a 6.4 0.89 0.21 N360+P240+S9000 82.3±3.0a 17.5±2.6a 2.3±0.5a 6.9 1.47 0.19 N540+P360+S9000 81.8±2.2a 15.4±2.6ab 2.2±0.6a 6.3 1.18 0.17