河北省永清县农耕区土壤肥力主要指标现状评价
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胡庆海, 李俊华, 王学求, 羿明璇, 吴慧, 田密
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Evaluation of the primary soil fertility indices for the agricultural area of Yongqing County, Hebei Province
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HU Qing-Hai, LI Jun-Hua, WANG Xue-Qiu, YI Ming-Xuan, WU Hui, TIAN Mi
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表4 不同土地利用类型的所有样点土壤肥力分级统计
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Table 4 Soil fertility grading statistics of all sampling sites in different land-use types
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| 土地利用类型 | 土壤养分要素 | 各级别样品数(占比) | | Ⅲ | Ⅱ | Ⅰ | 合计/个 | | 旱地 | 有机质 | 142 (92%) | 13 (8%) | 0 (0) | 155 | | 全氮 | 88 (57%) | 43 (28%) | 24 (15%) | 155 | | 有效磷 | 22 (14%) | 46 (30%) | 87 (56%) | 155 | | 速效钾 | 10 (6%) | 50 (32%) | 95 (61%) | 155 | | 菜地 | 有机质 | 84 (100%) | 0 (0) | 0 (0) | 84 | | 全氮 | 57 (68%) | 6 (7%) | 21 (25%) | 84 | | 有效磷 | 25 (30%) | 10 (12%) | 49 (58%) | 84 | | 速效钾 | 5 (6%) | 20 (24%) | 59 (70%) | 84 | | 园地 | 有机质 | 99 (100%) | 0 (0) | 0 (0) | 99 | | 全氮 | 83 (84%) | 12 (12%) | 4 (4%) | 99 | | 有效磷 | 24 (24%) | 19 (19%) | 56 (57%) | 99 | | 速效钾 | 1 (0) | 24 (24%) | 74 (75%) | 99 |
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