我国冬油菜典型种植区域土壤养分现状分析
任涛,郭丽璇,张丽梅,杨旭坤,廖世鹏,张洋洋,李小坤,丛日环,鲁剑巍(
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Soil Nutrient Status of Oilseed Rape Cultivated Soil in Typical Winter Oilseed Rape Production Regions in China
REN Tao,GUO LiXuan,ZHANG LiMei,YANG XuKun,LIAO ShiPeng,ZHANG YangYang,LI XiaoKun,CONG RiHuan,LU JianWei()
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图2. 不同产量水平下油菜种植土壤养分特征
以低产（<2 000 kg·hm-2）田块土壤的各项养分平均含量为参比,分别计算中产（2 000-3 000 kg·hm-2）和高产（>3 000 kg·hm-2）田块各养分含量的比值后作图
Fig. 2. Soil nutrient characteristics of oilseed rape-cultivation under different yield levels
Based on the average soil nutrient content of low yield (<2 000 kg·hm-2), the values of the middle-class (2 000-3 000 kg·hm-2) and high yield (>3 000 kg·hm-2) were calculated, and then mapped
