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Evaluation of the primary soil fertility indices for the agricultural area of Yongqing County, Hebei Province |
HU Qing-Hai1,2( ), LI Jun-Hua1,3, WANG Xue-Qiu1,2( ), YI Ming-Xuan3, WU Hui1,2, TIAN Mi1,2 |
1. Key Laboratory of Geochemical Exploration, Ministry of Natural Resources, Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China 2. International Centre on Global-Scale Geochemistry, United Nations Educational Scientific and Cultural Organization, Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China 3. Langfang Natural Resources Comprehensive Survey Center, China Geological Survey, Langfang 065000, China |
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Abstract Yongqing County, as a pivotal pollution-free vegetable production base in the Beijing-Tianjin-Hebei region, has made significant contributions to ensuring the food safety of this region. However, there has been no systematic and comprehensive evaluation of Yongqing County's soil fertility, hindering the sustainable development of its green food industry. This study collected 338 soil samples from the arable layer (depth: 0~20 cm) throughout the county, including 155 from dry land, 84 from vegetable plots, and 99 from garden plots. Four soil nutrient elements including organic matter, total nitrogen, available phosphorus and potassium were determined using these samples. The results show that: The average contents of organic matter, total nitrogen, available phosphorus, and rapidly available potassium in the soil samples from Yongqing County's arable layer were 5.29×10-3, 0.78×10-3, 41.8×10-6, and 197×10-6, respectively. The soil fertility generally exhibited deficient organic matter and total nitrogen and abundant available phosphorus and potassium. In addition, the soil fertility of Yongqing County was graded and evaluated according to China's agricultural standard Green food-Environmental quality for production area (NY/T 391—2021). For land-use types like dry land, vegetable and garden plots, their organic matter and total nitrogen contents were mostly at level Ⅲ, and available phosphorus and potassium contents were primarily at level Ⅰ. The soil nutrient contents differed significantly in spatial distributions. Specifically, Longhuzhuang, Liujie, and Yangmazhuang townships in the southwest generally had higher soil nutrient contents than Caojiawu Township, Hancun and Lilancheng towns in the northeast. To efficiently develop the green food industry, Yongqing County needs to apply fertilizers scientifically and properly according to land-use types and actual planting situations and considering the soil texture and natural geographical factors. The specific measures are as follows: increasing the organic matter and total nitrogen contents in the soil by applying more organic and nitrogen fertilizers; applying more phosphate and potassium fertilizers to soil lacking available phosphorus and potassium, otherwise, the application of such fertilizers should be controlled.
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Received: 27 November 2022
Published: 23 January 2024
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Regional location(a) and distribution of soil fertility survey sites(b) in Yongqing County
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土壤养分要素 | 有机质/10-3 | 全氮/10-3 | 有效磷/10-6 | 速效钾/10-6 | 级别 | Ⅰ | Ⅱ | Ⅲ | Ⅰ | Ⅱ | Ⅲ | Ⅰ | Ⅱ | Ⅲ | Ⅰ | Ⅱ | Ⅲ | 旱地 | >15 | 10~15 | <10 | >1.0 | 0.8~1.0 | <0.8 | >10 | 5~10 | <5 | >120 | 80~120 | <80 | 菜地 | >30 | 20~30 | <20 | >1.2 | 1.0~1.2 | <1.0 | >40 | 20~40 | <20 | >150 | 100~150 | <100 | 园地 | >20 | 15~20 | <15 | >1.0 | 0.8~1.0 | <0.8 | >10 | 5~10 | <5 | >100 | 50~100 | <50 |
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Soil fertility grading standard of green food production area
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用地类型 | 养分类别 | 平均值 | 最大值 | 最小值 | 中位数 | 标准偏差 | 变异系数/% | 研究区 | 有机质/10-3 | 5.29 | 13.50 | 0.91 | 4.64 | 2.83 | 53.6 | 全氮/10-3 | 0.78 | 3.18 | 0.09 | 0.74 | 0.35 | 45.2 | 有效磷/10-6 | 41.80 | 554.00 | 0.39 | 15.50 | 68.90 | 165 | 速效钾/10-6 | 197 | 1439.0 | 43.9 | 146.0 | 156.0 | 78.8 | 旱地 | 有机质/10-3 | 5.44 | 12.60 | 1.54 | 4.87 | 2.81 | 51.7 | 全氮/10-3 | 0.76 | 1.70 | 0.09 | 0.76 | 0.26 | 34.4 | 有效磷/10-6 | 22.50 | 319.70 | 0.69 | 11.90 | 37.20 | 166 | 速效钾/10-6 | 161.4 | 857.0 | 43.9 | 134.0 | 101.0 | 62.5 | 菜地 | 有机质/10-3 | 6.07 | 13.50 | 0.91 | 5.58 | 3.15 | 51.8 | 全氮/10-3 | 0.98 | 3.20 | 0.37 | 0.87 | 0.44 | 44.5 | 有效磷/10-6 | 89.40 | 554.00 | 3.63 | 59.50 | 99.70 | 112 | 速效钾/10-6 | 283.0 | 1439.0 | 87.2 | 215.0 | 213.0 | 75.2 | 园地 | 有机质/10-3 | 4.26 | 11.50 | 1.42 | 3.67 | 2.08 | 48.7 | 全氮/10-3 | 0.63 | 3.00 | 0.12 | 0.59 | 0.31 | 49.6 | 有效磷/10-6 | 31.40 | 500.00 | 0.39 | 11.30 | 56.40 | 180 | 速效钾/10-6 | 174.0 | 1081.0 | 50.2 | 135.0 | 128.0 | 73.9 |
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Statistics of soil nutrients of various land-use types in Yongqing County
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指标 | 级别 | Ⅰ | Ⅱ | Ⅲ | Ⅳ | Ⅴ | Ⅵ | 有机质/10-3 | >40 | 30~40 | 20~30 | 10~20 | 6~10 | <6 | 全氮/10-3 | >2 | 1.5~2 | 1~1.5 | 0.75~1 | 0.5~0.75 | <0.5 | 有效磷/10-6 | >40 | 20~40 | 10~20 | 5~10 | 3~5 | <3 | 速效钾/10-6 | >200 | 150~200 | 100~150 | 50~100 | 30~50 | <30 |
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Classification standards for the second national soil census
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Geochemical map of organic matter(a), total nitrogen(b), available phosphorus(c) and available potassium(d) in surface soils in Yongqing County
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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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Soil fertility grading statistics of all sampling sites in different land-use types
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乡镇 | 有机质 均值/ 10-3 | 全氮均 值/ 10-3 | 有效磷 均值/ 10-6 | 速效钾 均值/ 10-6 | 样本数 | 龙虎庄乡 | 7.50 | 0.98 | 70.10 | 320.0 | 22 | 刘街乡 | 9.90 | 1.17 | 41.10 | 315.0 | 25 | 养马庄乡 | 5.67 | 0.91 | 53.10 | 213.0 | 15 | 大辛阁乡 | 3.73 | 0.69 | 24.20 | 142.0 | 5 | 永清镇 | 4.92 | 0.81 | 46.20 | 187.0 | 87 | 后奕镇 | 6.48 | 0.74 | 33.10 | 165.0 | 17 | 曹家务乡 | 3.90 | 0.67 | 43.10 | 152.0 | 43 | 管家务乡 | 2.76 | 0.80 | 53.50 | 199.0 | 10 | 三圣口乡 | 4.44 | 0.52 | 29.40 | 150.0 | 33 | 韩村镇 | 4.65 | 0.66 | 37.10 | 144.0 | 21 | 别古庄镇 | 4.58 | 0.61 | 15.50 | 152.0 | 20 | 里澜城镇 | 4.51 | 0.67 | 22.30 | 160.0 | 27 |
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Average statistics of soil fertility contents of the main towns in Yongqing County
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