华北盐渍化草地土壤净氮矿化速率对不同水平氮添加的响应
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Response of soil net nitrogen mineralization to different levels of nitrogen addition in a saline-alkaline grassland of northern China
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图5. 华北盐渍化草地不同氮添加水平土壤净氮矿化速率和净硝化速率(平均值+标准误)。不同小写字母表示差异显著(p < 0.05)。 |
Fig. 5. Changes in soil net nitrogen (N) mineralization and net nitrification rates under different levels of N addition in a saline-alkaline grassland of northern China (mean + SE). Different lowercase letters indicate significant differences (p < 0.05). |
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