| 冉伟,谢永生,郝明德.渭北旱塬苹果园土壤矿质氮累积与分布研究[J].干旱地区农业研究,2008,(3):157~160 |
| 渭北旱塬苹果园土壤矿质氮累积与分布研究 |
| Mineral N accumulation and distri bution of apple orchard soil on the Weibei dryland |
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| DOI：10.7606/j.issn.1000-7601.2008.03.32 |
| 中文关键词: 渭北旱塬 苹果园 矿质氮 累积与分布 |
| 英文关键词:Weibei dryland apple orchard mineral N accumulation and distribution |
| 基金项目:国家科技支撑计划(2006BAD15B01-)； 中国科学院农业项目(kscx1-yw-N-15-04) |
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| 中文摘要: |
| 对渭北旱塬637龄苹果园土壤剖面中硝态氮和铵态氮的含量进行了分析测定,以了解不同树龄,不同剖面深度土壤矿质氮累积与分布状况。结果表明,不同种植年限苹果园0~400 cm剖面土体中,氨态氮的含量和分布保持相对稳定;硝态氮含量和分布变化显著,含量在0.31~195.32 mg/kg之间,土体剖面硝态氮的累积量呈显著增加的趋势,累积层出现在40~260 cm土层,最高含量出现在15龄果园的100~120 cm土层中,其值为195.32 mg/kg。土壤剖面累积大量的硝态氮,可能会造成潜在的环境问题。 |
| 英文摘要: |
| The content of NO3-N and NH+4-N was deter mined in the soil profile of 6to 37 age apple orchard on the Weibei dryland. The results showed that the content and distribution of NH+4-N maintain relatively stablein the depths of 0～400 cm soil profile with different planting years. The content and distribution of nitrate nitrogen varied significantly and the content of nitrate nitrogen was 0．31～195．32mg／kg ．The accumulation of nitrate nitrogenincreased significantly which was locatedin 40～260cm depths and the maximum nitrate N content was 195．32mg／kg in 100～120 cm depths of 15 age orchard．Large accumulation of nitrate N in the soil profile might lead to potential environmental pollution． |
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