秸秆还田配施氮肥对稻田土壤活性碳氮动态变化的影响

王士超,闫志浩,王瑾瑜,槐圣昌,武红亮,邢婷婷,叶洪龄,卢昌艾

Nitrogen Fertilizer and Its Combination with Straw Affect Soil Labile Carbon and Nitrogen Fractions in Paddy Fields

ShiChao WANG,ZhiHao YAN,JinYu WANG,ShengChang HUAI,HongLiang WU,TingTing XING,HongLing YE,ChangAi LU

表4 不同秸秆配施氮肥处理土壤易氧化有机碳和速效氮含量

Table 4 ROC and AN contents under straw incorporation matched with nitrogen fertilizer (mg·kg-1)

测定项目 Index 处理 Treatment 采样时期 Growth stage 平均值 Average 返青期 Regreening 拔节期 Shooting 分蘖期 Tillering 抽穗期 Heading 灌浆期 Grain-filling 成熟期 Maturity ROC CK 5.2±0.4a 4.6±0.1a 4.5±0.3a 5.0±0.3a 4.5±0.4a 4.0±0.2a 4.6a S 5.1±0.5a 4.5±0.4a 4.8±0.4a 5.1±0.6a 4.1±0.2a 4.1±0.2a 4.6a SN 5.0±0.3a 4.9±0.2a 4.7±0.2a 5.0±0.4a 4.4±0.4a 4.2±0.4a 4.7a SF 5.2±0.1a 4.6±0.2a 5.0±0.2a 5.5±0.4a 4.6±0.4a 4.3±0.3a 4.9a SM 5.5±0.4a 4.1±0.4b 5.0±0.4a 5.0±0.3a 4.5±0.3a 4.4±0.3a 4.7a 平均值Average 5.2A 4.6BC 4.8B 5.1A 4.4CD 4.2D AN CK 8.2±2.9a 18.8±4.5a 11.3±3.5a 10.2±0.2c 5.0±2.3b 22.6±11.0a 12.7a S 20.0±11.8a 26.9±12.2a 10.4±2.1a 11.2±0.9bc 10.9±5.9ab 10.9±12.5a 15.0a SN 16.9±4.0a 29.9±19.2a 11.9±3.9a 14.3±2.4a 13.4±6.1ab 18.1±26.4a 17.4a SF 18.1±19.8a 32.6±17.2a 11.7±0.2a 12.8±2.0ab 15.1±3.1a 5.1±1.0a 15.9a SM 28.5±18.9a 27.2±14.4a 13.8±3.9a 11.7±0.9bc 13.4±7.1ab 31.1±30.5a 20.9a 平均值Average 18.3B 27.0A 11.8B 12.0B 11.6B 17.6B