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

表2 各试验点籽粒产量与化肥氮用量拟合关系式

Table 2 Fitting expression of relationship between rapeseed yield and N application rate

处理 Treatment 高淳 Gaochun 安仁 Anren 沙洋 Shayang 休宁 Xiuning 当涂 Dangtu N y=12x+142, x<205 y=2486, x≥205 R2=0.947 y=8.0x+46, x<213 y=1754, x≥213 R2=0.920 y=8.8x+78, x<237 y=2159, x≥237 R2=0.980 y=8.6x+1421, x<258 y=3369, x≥258 R2=0.918 y=8.2x +1366, x<202 y=3024, x≥202 R2=0.899 M+N y=7.0x+1452, x<195 y=2777, x≥195 R2=0.918 y=10x+444, x<199 y=2514, x≥199 R2=0.904 y=8.6x+659, x<195 y=2342, x≥195 R2=0.926 y=9.7x+1887, x<179 y=3629, x≥179 R2=0.892 y=7.3x+2223, x<185 y=3704, x≥185 R2=0.787