| 黄土高原半干旱地区施氮对土壤硝态氮分布与累积的影响 |
| |
| 引用本文： | 杨玉惠,张仁陟.黄土高原半干旱地区施氮对土壤硝态氮分布与累积的影响[J].甘肃农业大学学报,2006,41(6):102-107. |
| |
| 作者姓名： | 杨玉惠 张仁陟 |
| |
| 作者单位： | 甘肃农业大学资源与环境学院,甘肃,兰州,730070 |
| |
| 基金项目： | 中澳合作项目(LWR2/1999/094) |
| |
| 摘 要： | 黄土高原中部雨养农业区春小麦氮肥3 a定位试验结果表明,连续施氮3 a,第3季春小麦收获时,各处理0~200 cm土壤剖面硝态氮的平均含量较对照极显著增大(除处理N105,施氮105 mg/hm2处理),施氮对不同层次硝态氮含量的影响主要作用在50~80 cm和80~110 cm土层;对0~200 cm和0~110 cm土壤剖面硝态氮的总累积量及0~200 cm剖面肥料氮在土壤剖面中总残留量的影响均达极显著水平.连续施氮2 a后第3年不施氮与连续施氮3 a相比,0~200 cm土壤剖面硝态氮平均含量、各层次硝态氮含量0、~200 cm和0~110 cm土壤剖面硝态氮累积量及0~110 cm土壤剖面累积量占0~200 cm土壤剖面硝态氮累积总量的比例均降低.0~200 cm剖面累积率和残留率除处理N105增加外,其余均下降.硝态氮的残留、累积不仅与施氮量有关而且与氮磷的配合比例有关.
|
| 关 键 词： | 硝态氮 施氮量 累积 残留 |
| 文章编号： | 1003-4315(2006)06-0102-06 |
| 修稿时间： | 2006年3月28日 |
Effects of nitrogen fertilization on the distribution and accumulation of nitrate nitrogen in soil in the loess plateau semi-arid areas |
| |
| YANG Yu-hui,ZHANG Ren-zhi.Effects of nitrogen fertilization on the distribution and accumulation of nitrate nitrogen in soil in the loess plateau semi-arid areas[J].Journal of Gansu Agricultural University,2006,41(6):102-107. |
| |
| Authors: | YANG Yu-hui ZHANG Ren-zhi |
| |
| Abstract: | The effects of nitrogen rate were researched on spring wheat on soil residual nitrate distribution and accumulation in 0～200 cm soil profile.The study was conducted in the rain-fed agriculture region of the middle part of loess plateau for 3 years.The results showed that the nitrogen rates influenced significantly on the soil mean nitrate amount in the 0～200 cm profiles and accumulation in the 0～200 cm and 0～110 cm profiles.Comparing applying nitrogen fertilizer continuously for 2 years and no applying nitrogen fertilizer the 3rd year with applying nitrogen fertilizer continuously for 3 years,the soil nitrate amount in 0～200 cm profile and accumulation in 0～200 and 0～110 cm profiles decreased,as well as the rate of the nitrate accumulation in 0～110 cm profiles to that of 0～200 cm profiles.The rate of nitrate accumulation and residual rate decreased except the treatment of N_(105).And the residual nitrogen in the profiles was affected by the nitrogen rate.Soil nitrate amount and accumulation were affected not only by nitrogen rate also by the coordination rate of nitrogen and phosphor fertilizer. |
| |
| Keywords: | nitrate nitrogen nitrogen quantity nitrogen accumulation residual nitrogen |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
