陕西关中富硒土壤研究及开发利用——以三原—阎良地区为例
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乔新星, 晁旭, 任蕊, 张继军, 胡奎, 李傲瑞, 张志敏
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Research, development and utilization of selenium-rich soil of Shaanxi:A case study of Sanyuan-Yanliang area
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QIAO Xin-Xing, CHAO Xu, REN Rui, ZHANG Ji-Jun, HU Kui, LI Ao-Rui, ZHANG Zhi-Ming
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表1 三原—阎良地区肥力评价结果统计
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Table 1 Statistics on soil fertility in Sanyuan-Yanliang area
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元素 | 一等(丰富) | | 二等(较丰富) | | 三等(中等) | | 四等(较缺乏) | | 五等(缺乏) | 面积/km2 | 比例/% | 面积/km2 | 比例/% | 面积/km2 | 比例/% | 面积/km2 | 比例/% | 面积/km2 | 比例/% | N | | | | | | | 825.62 | 65.79 | | 417.87 | 33.30 | | 11.40 | 0.91 | P | | | | 31.39 | 2.50 | | 1033.27 | 82.34 | | 190.23 | 15.16 | | | | K | | | | 1219.06 | 97.14 | | 35.83 | 2.86 | | | | | | | 有机质 | 134.48 | 10.72 | | 786.61 | 62.68 | | 329.87 | 26.29 | | 3.92 | 0.31 | | | | C | 1185.54 | 94.47 | | 68.78 | 5.48 | | 0.57 | 0.05 | | | | | | | Ca | 661.29 | 52.70 | | 593.60 | 47.30 | | | | | | | | | | Mg | 979.85 | 78.08 | | 275.05 | 21.92 | | | | | | | | | | S | 1231.84 | 98.16 | | 23.05 | 1.84 | | | | | | | | | |
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