Effects of nitrogen fertilizer application and irrigation level on soil nitrogen leaching and accumulation in deep soil

被引：0

作者：

Shang, Fangze ^{[1
]}

Yang, Peiling ^{[1
]}

Ren, Shumei ^{[1
]}

机构：

[1] College of Water Resources and Civil Engineering, China Agricultural University

来源：

Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | 2013年 / 44卷 / 10期

关键词：

Irrigation level; Migration and accumulation; NH[!sub]4[!/sub][!sup]+[!/sup]-N; Nitrogen application rate; NO[!sub]3[!/sub][!sup]-[!/sup]-N; Total nitrogen;

D O I：

10.6041/j.issn.1000-1298.2013.10.019

中图分类号：

学科分类号：

摘要：

Based on the field plot experiments of four chemical N application rates (0, 65, 130 and 195 kg/hm2) and two irrigation levels (52.5 and 105 mm) applied to summer maize and winter wheat growing, the NO3--N, NH4+-N and total nitrogen migration and accumulation in the first 450 cm depth of layered soils for each treatment were studied. The results showed that the soil texture and structure had a significant effect on soil moisture, NO3--N and total nitrogen content and distribution in soil profile, and soil structure had a significant effect on soil NH4+-N content and distribution in soil profile. Fertilization and irrigation had different influence depth on soil NO3--N, NH4+-N and total nitrogen, and the direct influence depth was 400, 200 and 120 cm, respectively, while the indirect influence depth was 400 cm for all. Soil NO3--N in the treatments that irrigation level was 52.5 mm and nitrogen application rate was 195 kg/hm2, and irrigation level was 105 mm and nitrogen application rate greater than or equal to 130 kg/hm2 had obvious phenomenon of migration, and the migration depth was 250 and 400 cm, respectively. For the 0-450 cm layered soils that had a loam, sandy soil and loam layer from top to bottom, the average soil NO3--N, NH4+-N and total nitrogen content were all in the following descending order: 380-450 cm loam layer, 0-120 cm loam layer, and 120-380 cm sandy soil layer. The special 380-450 cm loam layer blocked the migration of water and nitrogen. It was advised to use an irrigation level of 52.5 mm and nitrogen application rate of 65 kg/hm2 at a single time in growing summer maize and winter wheat in southeast agricultural region of Beijing.

引用

页码：112 / 121

页数：9

共 27 条

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