我国冬油菜典型种植区域土壤养分现状分析
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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
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Tao REN,LiXuan GUO,LiMei ZHANG,XuKun YANG,ShiPeng LIAO,YangYang ZHANG,XiaoKun LI,RiHuan CONG,JianWei LU
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表1 土样养分分级指标
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Table 1 Soil nutrient grading index
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养分 Nutrient | 1级 Grade 1 很丰富 Very rich | 2级 Grade 2 丰富 Rich | 3级 Grade 3 中等 Medium | 4级 Grade 4 潜在缺乏 Potential deficiency | 5级 Grade 5 缺乏 Deficiency | 6级 Grade 6 极缺乏 Extreme deficiency | 有机质 Organic matter | >40 | 30-40 | 20-30 | 10-20 | 6-10 | <6 | 全氮Total N | >2 | 1.5-2.0 | 1.0-1.5 | 0.75-1.0 | 0.5-0.75 | <0.5 | 速效磷 Available P | - | >30 | 25-30 | 12-25 | 6-12 | <6 | 速效钾 Available K | - | >180 | 135-180 | 60-135 | <60 | - | 有效钙Available Ca | - | >1000 | 700-100 | 500-700 | 300-500 | <300 | 有效镁Available Mg | - | >300 | 200-300 | 100-200 | 50-100 | <50 | 有效硫Available S | - | >35 | 25-35 | 15-25 | 10-15 | <10 | 有效铁Available Fe | >20 | 10-20 | 4.5-10 | 2.5-4.5 | <2.5 | - | 有效锰Available Mn | >30 | 15-30 | 5-15 | 1-5 | <1 | - | 有效铜Available Cu | >1.8 | 1-1.8 | 0.2-1 | 0.1-0.2 | <0.1 | - | 有效锌Available Zn | >3 | 1-3 | 0.5-1 | 0.3-0.5 | <0.3 | - | 有效硼Available B | - | >1.0 | 0.6-1.0 | 0.2-0.6 | <0.2 | - |
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