土默特左旗农田土壤环境质量综合评价及特色农业开发建议

包凤琴, 成杭新, 永胜, 杨宇亮, 马志超, 赵丽娟

The comprehensive evaluation of farmland soil environmental quality and suggestions on the development of agriculture with distinctive local features in Tumed Left Banner, Inner Mongolia

BAO Feng-Qin, CHENG Hang-Xin, YONG Sheng, YANG Yu-Liang, MA Zhi-Chao, ZHAO Li-Juan

表2 土壤氮、磷、钾全量及硒等级划分标准

Table 2 Total nitrogen, phosphorus and potassium in soil and grading standard of selenium

指标 一等(丰富) 二等(较丰富) 三等(中等) 四等(较缺乏) 五等(缺乏) w(全氮)/10-3 >2.00 >1.50~2.00 >1.00~1.50 >0.75~1.00 ≤0.75 w(全磷)/10-3 >1.0 >0.8~1.0 >0.6~0.8 >0.4~0.6 ≤0.4 w(全钾)/10-3 >25 >20~25 >15~20 >10~15 ≤10 w(有机质)/10-3 >40 >30~40 >20~30 >10~20 ≤10 指标 缺乏 边缘 适量 高 过剩 w(Se)/10-6 ≤0.125 0.125~0.175 0.175~0.40 0.40~3.0 >3.0