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3 不同秸秆配施氮肥处理土壤水溶性有机碳氮含量

Table 3 DOC and DON 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 DOC CK 592.0±141.6a 788.1±164.8a 956.3±116.6a 1156.6±355.6a 831.3±357.1a 843.8±268.0a 861.4a S 621.1±46.3a 567.7±98.1a 1628.0±274.3a 1035.4±741.5a 755.7±146.1a 541.6±324.9ab 858.2a SN 488.3±95.4a 702.8±109.8a 1183.7±264.6a 1193.7±489.7a 882.6±154.5a 541.1±352.6ab 832.0a SF 617.6±134.0a 766.7±233.2a 1055.6±255.5a 1086.9±381.9a 695.4±245.2a 690.7±235.2ab 818.8a SM 805.9±224.1a 518.9±484.2a 1081.8±163.4a 1367.1±265.4a 908.6±333.9a 308.4±48.7b 831.8a 平均值Average 625.0B 668.8B 1181.1A 1168.0A 814.7B 585.1B DON CK 8.8±2.7a 9.7±4.3b 13.2±7.5a 13.0±1.0a 15.4±3.3a 12.9±2.3ab 12.1a S 10.5±4.7a 10.3±3.0ab 17.3±5.2a 14.8±3.8a 13.9±2.5a 10.5±2.4b 12.9a SN 11.3±4.9a 13.7±6.4ab 17.1±2.2a 16.2±1.8a 15.5±2.2a 10.1±3.5ab 14.0a SF 16.0±12.3a 16.1±2.0a 14.2±2.2a 12.6±3.7a 13.6±2.5a 8.7±2.3b 13.5a SM 17.5±1.7a 11.8±1.8ab 13.2±2.9a 14.3±1.9a 18.8±2.8a 7.7±1.5a 13.9a 平均值Average 12.9AB 12.3AB 15.0A 14.2A 15.4A 10.0B