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2 不同秸秆配施氮肥处理的土壤微生物量碳氮含量

Table 2 SMBC and SMBN 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 SMBC CK 1314.1±479.0a 203.2±83.2b 1833.9±763.1a 3186.3±510.3a 1840.8±1185.5a 2349.8±1082.2a 1788.0a S 1871.7±332.6a 674.3±492.9ab 997.1±577.4a 2252.5±1539.7a 3290.9±1248.4a 815.2±771.7a 1650.3a SN 1170.0±667.2a 1217.6±900.8a 1310.6±492.0a 1245.4±551.5a 2905.6±1590.9a 1580.6±1686.9a 1571.6a SF 1414.0±505.7a 965.8±518.9ab 1926.6±1885.6a 1585.5±1690.7a 1833.5±1017.4a 2278.2±2227.5a 1667.3a SM 1947.4±526.4a 604.8±588.6ab 1213.7±782.2a 1602.3±530.0a 2384.8±749.0a 1455.0±934.2a 1534.7a 平均值 Average 1543.4B 733.1C 1456.4BC 1974.4AB 2451.1A 1695.8AB SMBN CK 35.0±3.1a 14.1±6.1a 22.5±3.7a 36.4±30.6a 23.0±1.6a 29.2±19.6a 26.7a S 25.5±2.8a 37.0±33.7a 20.6±11.3a 39.9±6.0a 17.2±8.1a 13.1±8.1a 25.6a SN 26.9±9.5a 12.4±3.3a 12.5±5.8a 16.5±10.9a 20.7±12.1a 16.8±7.4a 17.6a SF 37.2±19.9a 44.6±22.7a 16.2±10.3a 23.3±22.6a 22.1±6.9a 18.0±9.5a 26.9a SM 35.0±3.1a 28.2±14.1a 30.9±25.1a 30.2±16.8a 25.8±15.9a 22.0±16.0a 28.7a 平均值 Average 31.9A 27.2A 20.5A 29.3A 21.8A 19.8A