持续性秸秆还田配施化肥对油菜-水稻轮作周年氮磷径流损失的影响

靳玉婷,刘运峰,胡宏祥,穆静,高梦瑶,李先藩,薛中俊,龚静静

Effects of Continuous Straw Returning with Chemical Fertilizer on Annual Runoff Loss of Nitrogen and Phosphorus in Rice-Rape Rotation

JIN YuTing,LIU YunFeng,HU HongXiang,MU Jing,GAO MengYao,LI XianFan,XUE ZhongJun,GONG JingJing

表5 2017—2019年农田径流氮磷流失特征

Table 5 Characteristics of nitrogen and phosphorus loss from field runoff from 2017 to 2019

种植季度 Planting season 处理 Treatment 占总氮流失量比例 Proportion in TN loss (%) 占总磷流失量比例Proportion in TP loss (%) NO3--N/TN NH4+-N/TN TDP/TP 2017 油菜 2017 Rape CK 7.89±0.33c 4.96±0.08c 38.13±1.06a F 18.24±0.88ab 6.24±0.27b 37.85±2.73a SF 20.57±0.54a 7.41±0.51a 35.96±4.03a SDF 17.04±1.37b 7.66±0.53a 37.37±3.62a 2017 水稻 2017 Rice CK 10.08±0.87a 13.97±0.51b 47.95±1.56a F 12.31±1 17a 23.67±2.04a 50.37±1.34a SF 12.26±0.37a 26.21±1.57a 51.67±1.03a SDF 11.04±1.42a 22.62±1.73a 52.33±6.14a 2018 油菜 2018 Rape CK 31.82±1.87a 5.69±0.19a 49.75±1.65b F 28.64±0.57a 5.85±0.98a 54.64±1.06a SF 29.71±0.51a 5.79±0.29a 54.32±0.79a SDF 32.12±0.21a 6.40±0.09a 53.64±0.20a 2018 水稻 2018 Rice CK 15.15±1.97a 16.91±1.04b 50.48±1.57a F 10.61±0.80a 25.82±1.64a 52.30±1.13a SF 11.20±1.89a 31.35±2.13a 51.72±2.70a SDF 14.58±2.61a 16.47±1.82b 50.40±1.24a 2019 油菜 2019 Rape CK 22.62±0.64b 9.32±0.50a 34.43±0.63b F 28.09±0.38a 9.36±0.33a 35.51±0.34a SF 29.72±0.85a 7.77±0.55b 35.28±0.75a SDF 31.34±2.49a 7.87±0.33b 34.89±0.29a 2019 水稻 2019 Rice CK 12.05±1.35a 15.20±0.24c 40.18±1.76b F 9.68±0.15a 31.50±0.54a 40.98±0.15ab SF 9.88±0.79a 29.27±2.93a 44.05±0.95a SDF 10.15±0.35a 21.77±0.77b 41.28±0.77ab