长期施肥对红壤性水稻土有机碳矿化的影响

吕真真,刘秀梅,仲金凤,蓝贤瑾,侯红乾,冀建华,冯兆滨,刘益仁

Effects of Long-Term Fertilization on Mineralization of Soil Organic Carbon in Red Paddy Soil

ZhenZhen LÜ,XiuMei LIU,JinFeng ZHONG,XianJin LAN,HongQian HOU,JianHua JI,ZhaoBin FENG,YiRen LIU

表1 不同施肥处理的肥料纯养分施用量

Table 1 Mean annual application rates of net nutrients during the run of experiment (kg·hm-2)

处理Treatment 作物 Crop 基肥 Planting time 分蘖肥 Tillering stage 幼穗分化肥 Panicle differentiation stage 过磷酸钙 Superphosphate (P2O5) 紫云英（早稻）或猪粪（晚稻） Chinese milk vetch (early rice) or pig manure (late rice) 尿素 (N) Urea 尿素 (N) Urea 氯化钾 Potassium chloride (K2O) 尿素 (N) Urea 氯化钾 Potassium Chloride (K2O) (N) (P2O5) (K2O) CK 早稻 Early rice 0 0 0 0 0 0 0 0 0 晚稻 Late rice 0 0 0 0 0 0 0 0 0 NPK 早稻 Early rice 60.0 0 0 0 74.9 37.4 75.0 37.4 75 晚稻 Late rice 60.0 0 0 0 89.8 44.9 75.0 44.9 75 70F+30M 早稻 Early rice 48.0 44.3 11.7 33.7 52.9 26.4 58.2 26.4 58.2 晚稻 Late rice 37.2 54.0 22.8 72.0 63.1 31.6 39.1 31.6 39.1 50F+50M 早稻 Early rice 40.2 74.9 19.8 56.9 37.4 18.7 46.8 18.7 46.8 晚稻 Late rice 22.0 90.1 38.0 120.2 44.9 22.5 15.0 22.5 15.0 30F+70M 早稻 Early rice 33.0 103.9 27.4 78.9 23.0 11.5 35.7 11.5 35.7 晚稻 Late rice 6.8 126.0 53.2 168.0 30.0 12.2 0 12.2 0