| 水蚀条件下硝酸铵施用对黄绵土氮素流失的影响 |
| |
| 引用本文： | 张兴昌.水蚀条件下硝酸铵施用对黄绵土氮素流失的影响[J].农业工程学报,2000,16(2):58-63. |
| |
| 作者姓名： | 张兴昌 |
| |
| 作者单位： | 中国科学院、水利部水土保持研究所 |
| |
| 基金项目： | 国家自然科学基金(49871049);中国科学院“西部之光”人才培养项目;中国科学院重大科研项目(KZ951-B1-211);特别支持项目(KZ95T-04-03)资助 |
| |
| 摘 要： | 研究结果表明不同坡度谷子地,高N处理小区径流中铵态氮、硝态氮和有效氮浓度平均为1.06、0.76和1.82mg/kg,低N分别为0.64、1.29和1.93mg/kg;高氮处理土壤铵态氮、硝态氮和有效氮平均流失量分别达到17.90、12.93和30.84kg/(km2·a),低N流失量为11.90、23.86和35.77kg/(km2·a)。高氮处理小区泥沙中有机质和全氮浓度平均为5.21和0.536g/kg,而低氮处理分别为4.94和0.481g/kg;高氮和低氮处理土壤有机质流失量分别为5702和5743kg/(km2·a),土壤全氮流失量为498和559kg/(km2·a)
|
| 关 键 词： | 土壤水蚀 硝酸铵氮肥 土壤氮素流失 |
| 收稿时间： | 1999/6/17 0:00:00 |
| 修稿时间： | 1999-06-17 |
Nitrogen Loss of Loess Soil as Affected by NH4NO3 Applying in Process of Water Erosion |
| |
| Zhang Xingchang.Nitrogen Loss of Loess Soil as Affected by NH4NO3 Applying in Process of Water Erosion[J].Transactions of the Chinese Society of Agricultural Engineering,2000,16(2):58-63. |
| |
| Authors: | Zhang Xingchang |
| |
| Abstract: | The millets fertilizing NH4NO3 with high N(NH4NO3 500 kg/hm2) and low N(NH4NO3 250 kg/hm2), are planted in the slope lands with 10°, 20°, 25°and 30° slope gradient. The research results were as follows: The mean concentrations of NH4+-N, NO3--N and NH4++NO3- in runoff were 1.06, 0.76, and 1.82 mg/kg in high N treatment (HNT), and 0.64, 1.29, 1.93 mg/kg in low N treatment (LNT) respectively. The loss amounts of them in runoff were 17.90, 12.93, and 30.84 kg/(km2·a) in HNT, and 11.90, 23.86, 35.77 kg/(km2·a) in LNT seperately. The concentrations of organic matter and total N in sediment were 5.21 and 0.536 g/kg in HLT, 4.94 and 0.481 g/kg in LNT seperately. Accordingly, the loss amounts of them in sediment were 5 702, 5 743 kg/(km2·a) in HLN, and 498,559 kg/(km2·a) in LNT respectively. |
| |
| Keywords: | soil & water erosion NH4NO3 fertilizer soil nitrogen loss |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《农业工程学报》浏览原始摘要信息 |
| 点击此处可从《农业工程学报》下载免费的PDF全文 |
|
