保墒灌溉条件下土壤中硝态氮分布和累积研究 |
| |
引用本文: | 员学锋,吴普特,汪有科,牛文全.保墒灌溉条件下土壤中硝态氮分布和累积研究[J].安徽农业科学,2009,37(22):10620-10622. |
| |
作者姓名: | 员学锋 吴普特 汪有科 牛文全 |
| |
作者单位: | 1. 长安大学地球科学与资源学院,陕西西安,710054 2. 西北农林科技大学国家节水灌溉杨凌工程技术研究中心,陕西杨凌,712100 |
| |
基金项目: | 国家高技术研究发展计划(863计划) |
| |
摘 要: | 目的]研究不同保墒灌溉措施对夏玉米地土壤中硝态氮的分布和累积影响。方法]以玉米作物为试材,在灌溉量为0、600、1200m3/hm2条件下,通过田间试验研究地膜覆盖、秸秆覆盖、PAM处理和非覆盖处理(CK)对夏玉米收获时土壤中.硝态氮的分布和累积状况的影响。结果]夏玉米收获后,在非灌溉条件下,各处理的硝态氮含量基本随着土壤深度的增加而递减,在灌溉条件下,则在50—70cm土壤中出现硝态氮累积凸峰。无论灌溉与否,0~100cm土壤中各处理硝态氮含量的大小顺序为:PAM处理〉CK〉地膜覆盖〉秸秆覆盖。同一保墒处理,在O~40cm土层,硝态氮累积量均随着灌溉量的增加而降低,在60~70cm土层以下则恰好相反。结论]该研究为下茬作物的施肥提供理论指导和技术支撑。
|
关 键 词: | 田间试验 保墒灌溉 硝态氮 |
Study on the Distribution and Accumulation of Nitrate Nitrogen in Soil under Moisture-retaining Irrigation |
| |
Institution: | YUAN Xue-feng et al (College of Earth Science and Resources of Chang'an University, Xi'an, Shaanxi 710054) |
| |
Abstract: | Objective] The purpose was to study the effects of different measures of moisture-retaining irrigation on the distribution and accumulation of nitrate nitrogen in the soil for summer maize.Method] With maize as tested materials,under the irrigation amount of 0,600,1200 m3/hm2,the field experiments were carried out to study the effects of plastic film mulching,straw mulching,PAM processing and non-coverage treatment(CK) on the distribution and accumulation of nitrate nitrogen in soil when summer maize harv... |
| |
Keywords: | Filed experiment Moisture conserving irrigation (MCI) Nitrate nitrogen |
本文献已被 CNKI 维普 万方数据 等数据库收录! |
|