长江中下游冬油菜产区有机无机肥配施下减氮增效潜力分析
蒋倩红(),陆志峰,赵海燕,郭俊杰,刘文波,凌宁(),郭世伟
Potential Analysis of Reducing Chemical Nitrogen Inputs While Increasing Efficiency by Organic-Inorganic Fertilization in Winter Rapeseed Producing Areas of the Middle and Lower Reaches of the Yangtze River
JIANG QianHong(),LU ZhiFeng,ZHAO HaiYan,GUO JunJie,LIU WenBo,LING Ning(),GUO ShiWei

图1. 施肥对油菜籽粒产量的影响及减氮潜力评估
◇表示在有机无机配施处理下达到最高产量时的化肥氮用量和籽粒产量;△表示在单施化肥处理下达到最高产量时的化肥氮用量和籽粒产量;☆表示有机无机配施下达到单施化肥最高产量时的化肥氮用量和籽粒产量。替代比例指在相同目标产量下,施用有机肥后化肥氮的减施比例。N：单施化肥处理;M+N：有机无机配施处理。下同

Fig. 1. Effects of fertilization on rapeseed yield and evaluation on chemical N reduction potential
◇ Represents the highest yield and corresponding N application rate under the combination of manure and chemical fertilizer; △ Denotes the highest yield and corresponding N application rate in only application of chemical fertilizer; ☆ Indicates the N application rate when the rapeseed yield of combined treatment is same to the highest yield of only application of chemical fertilizer. Replacement ratio refers to the reduced ratio of nitrogen fertilizer according to on the purpose to achieve same yields. N: Only application of chemical fertilizer; M+N: Combination of manure and chemical fertilizer. The same as below