不同缓/控释氮肥对春玉米氮素吸收利用、 土壤无机氮变化及氮平衡的影响

侯云鹏, 李前, 孔丽丽, 秦裕波, 王蒙, 于雷, 王立春, 尹彩侠

Effects of Different Slow/Controlled Release Nitrogen Fertilizers on Spring Maize Nitrogen Uptake and Utilization, Soil Inorganic Nitrogen and Nitrogen Balance

YunPeng HOU, Qian LI, LiLi KONG, YuBo QIN, Meng WANG, Lei YU, LiChun WANG, CaiXia YIN

表4 不同施氮处理0—90 cm剖面土壤氮素表观平衡

Table 4 The apparent balance of 0-90 cm soil profile nitrogen of different N fertilizer treatments (kg·hm-2)

年份 Year 处理 Treatment 氮素输入Nitrogen input 氮素输出Nitrogen output 施氮量 N fertilizer 起始无机氮 Initial inorganic N 净矿化 mineralization 作物携出 Potato uptake 残留无机氮 Residual inorganic N 氮表观损失 Apparent N loss 2014 CK 0 142.4 55.5 124.3d 73.6c 0 CU 200 142.4 55.5 164.5c 129.1b 104.3a SCU 200 142.4 55.5 183.1b 139.1a 75.7b CRF 200 142.4 55.5 193.7a 144.6a 59.6c SU 200 142.4 55.5 187.9ab 148.2a 61.8c UF 200 142.4 55.5 182.5b 150.2a 65.2c 2015 CK 0 152.5 52.0 116.0d 88.5c 0 CU 200 152.5 52.0 171.4c 136.4b 96.7a SCU 200 152.5 52.0 189.1b 146.2a 69.2b CRF 200 152.5 52.0 197.9a 153.8a 52.8c SU 200 152.5 52.0 194.6ab 155.7a 54.2c UF 200 152.5 52.0 187.5b 158.5a 58.5c 方差分析 ANOVA 年份(Y) — — — * ** * 施肥处理(F) — — — ** ** ** 年份×施肥处理(Y×F) — — — * NS NS