期刊论文

Effects of the reduction of controlled-release urea application on nitrogen leaching in double cropping paddy field

Zhang, Y.-P.

中文

应用生态学报

1001-9332

2018

29

10

3267-3274

10.13287/j.1001-9332.201810.029

2016YFD0200800:国家重点研发计划 2016NK2112:湖南省重点研发计划项目 16K040:湖南省教育厅平台项目

本校为第一机构

大量施用氮肥引起的土壤氮素淋失是稻田氮素损失的一个重要途径.为探究自然降雨过程中典型双季稻田氮渗漏淋失特点,采用田间渗漏池法,通过大田小区试验,研究控释尿素减施对稻田土壤60 cm深处渗漏水中氮淋失和水稻产量的影响.结果表明:施肥初期出现氮渗漏淋失峰值,这是防控的关键时期;双季稻生长季控释尿素减氮20%(0.8CRU)和减氮30%(0.7CRU)处理全氮淋失量分别为42.3和37.7 kg·hm~(-2),均显著低于常规尿素(CU)处理(53.9 kg·hm~(-2)),且0.7CRU处理显著低于等氮量控释尿素(1.0CRU)处理(51.3 kg·hm~(-2));各施氮处理全氮渗漏淋失率为11.9%~13.5%,处理间差异不显著.0.8CRU和0.7CRU处理较CU处理明显...

Nitrogen (N) leaching is a major pathway of N losses in paddy fields. Here, an experiment was conducted to assess the effects of the reduction of controlled-release urea application on grain yield and N leaching in a double-cropping paddy field. Fertilization treatments included zero-N (CK, control, 0 kg N•hm-2), conventional urea (CU, 180 kg N•hm-2), and four polymer-coated urea fertilization levels, i.e., 1.0CRU, 0.9CRU, 0.8CRU, 0.7CRU, which represented 0, 10%, 20% and 30% reduction of fertilizer inputs relative to CU, respectively. Leacha...