| 摘要: |
| 分别测定了泾惠灌区0～20 cm、20～50 cm土层36个作物种植点的土壤有机质、全氮、全磷含量, 18个作物种植点的速效养分含量。结果表明,泾惠灌区0～20 cm、20～50 cm土层中有机质、全氮、全磷含量分别为10.62±0.36, 6.03±0.06; 0.90±0.02, 0.60±0.03和1.74±0.10, 1.58±1.45 g/kg。全磷含量较高,有机质、全氮含量较低。速效养分的供应状况为K>P>N,约80%的土壤出现潜在性缺钾, 83%的土壤速效磷含量较低或缺乏,88%的土壤速效氮较低或缺乏。对应该研究,应用聚类分析得出了高、中、低土壤肥力类型,有机质、全氮、全磷、速效钾含量范围分别为:≥12,≥1.0,≥2.0 g/kg和≥150 μg/g;10～12,0.8～1.0, 1.5～2.0 g/kg和120～150 μg/g;≤10,≤0.8,≤1.5 g/kg和≤120 μg/g。 |
| 关键词: 泾惠灌区 作物种植区 土壤养分 肥力划分 |
| DOI： |
| 分类号:G232 |
| 基金项目:国家九五攻关资助项目(96-004-04-05);杨陵基金资助项目 |
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| The Study of Soil Fertility on Jinghui Irrigajing Area |
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| Abstract: |
| In this research tests, organic matter, total N, total P contents in 0-20 cm and 20-50 cm soil layers in 36 crop growing spots are determined in Jinghui Irrigating Area, and the available soil nutrient in 18 spots are determined as well.The determined results show that organic matter, total N and P contents are 10.62±0.36, 6.03±0.06;0.90±0.12, 0.60±0.03 and 1.74±0.10, (1.58±1.45)g/kg in soil layer of 0-20 cm and 20-50 cm depth, the total P contents is rich, the organic matter and total N is poorer.The supplies of available N,P and K in soil are K>P>N, and about 80% of soi appears deficient in latent available K, 83% and 88% soil are relatively deficient in available P and N.Through the classification of the nutrient ingredients and yields, the result shows that soil fertility is divided into higher, middle and lower types, and corresponding with these the range, contents of organic matter, total N, total P and available K are proper in order:≥12,≥1.0,≥2.0 g/kg and ≥150 μg/g; 10-12，0.8-1.0, 1.5-2.0 g/kg and 120-150 μg/g;≤10,≤0.8,≤1.5 g/kg and ≤120 μg/g. |
| Key words: Jinghui Irrigating Area crop growing spots soil nutrient fertility classification |
