猪粪还田对土壤硝态氮淋失的影响研究——以黄灌区稻旱轮作制为例

发布时间：2018-02-02 22:17

本文关键词： 黄灌区稻旱轮作制猪粪还田土壤硝态氮淋失　出处：《中国环境科学》2016年02期 　论文类型：期刊论文

【摘要】：宁夏引黄灌区是水污染严重地区之一,大部分排水沟水质属于劣五类,主要污染物是硝态氮与铵态氮.猪粪还田试验共有3个处理:传统施肥+空白(CK)、传统施肥+猪粪还田4500kg/hm~2(T1)和传统施肥+猪粪还田9000kg/hm~2(T2).采用树脂芯法测定了30,60,90cm土层的硝态氮淋失量.结果表明,30cm土层处,猪粪还田没有明显增加土壤硝态氮淋失.与对照(15.96±0.41)kg/hm~2相比,T1(16.85±0.40)kg/hm~2与T2(17.01±0.46)kg/hm~2没有达到显著差异(P0.05);60cm土层处理与对照也没有达到显著差异;90cm土层处的猪粪处理与对照达到显著差异,处理之间没有差异.猪粪还田有利于土壤有机质和总氮提高,30cm土层,与对照相比,T1和T2的有机质增加0.95g/kg和1.41g/kg,分别提高7.50%和11.13%;总氮增加0.06和0.16g/kg,分别提高7.72%和22.04%.猪粪还田提高了作物产量,水稻增产12.26%~11.56%,冬小麦产量提高9.32%~12.52%.
[Abstract]:Ningxia Yellow River Irrigation District is one of the serious water pollution areas, most of the drainage ditch water quality belongs to the inferior five categories, the main pollutants are nitrate nitrogen and ammonium nitrogen. There are three treatments of pig manure returning to the field: traditional fertilizer blank CK). Traditional fertilized pig manure was returned to the field with 4500kg / hm ~ (1) and traditional fertilized pig manure was returned to the field (9000kg / h ~ (2)) T _ (2). The resin core method was used to determine 30 ~ (60). The amount of nitrate leaching in 90 cm soil layer. The results showed that pig manure did not increase the nitrate leaching loss in 30 cm soil layer, compared with the control group (15.96 卤0.41 kg 路hm ~ (-2) 路hm ~ (-2)). There was no significant difference (P 0.05) between T1 + 16.85 卤0.40 kg / hmc-2 and T2N 17.01 卤0.46 kg / hmmc-2; There was no significant difference between the treatment of 60cm soil layer and the control. The pig manure treatment in 90 cm soil layer had significant difference with the control, but there was no difference between the treatment and the treatment. Pig manure returning to the field was beneficial to the soil organic matter and total nitrogen to increase 30 cm soil layer, compared with the control. The organic matter of T1 and T2 increased by 0.95g / kg and 1.41g / kg, and increased by 7.50% and 11.13g / kg, respectively. Total nitrogen increased by 0.06 and 0.16g / kg, and increased by 7.72% and 22.04.The return of pig manure to the field increased crop yield, and the yield of rice increased by 12.26g / kg by 11.56%. The yield of winter wheat was increased by 9.32% and 12.52%.
【作者单位】：中国农业科学院农业环境与可持续发展研究所;农业部农业环境与气候变化重点开放实验室;中国科学院地理科学与资源研究所生态网络观测与模拟重点实验室CERN综合研究中心;宁夏农林科学院;西北农林科技大学林学院;
【基金】：国家水体污染控制与治理科技重大专项(2014ZX07201-009)
【分类号】：S141;X53
【正文快照】： 《2014年中国环境状况公报》表明针对全国423条主要河流、62座重点湖泊(水库)的968个国控地表水监测断面(点位)的水质监测显示,Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、劣Ⅴ类水质断面分别占3.4%、30.4%、29.3%、20.9%、6.5%、9.2%,主要污染指标为化学需氧量、总磷和五日生化需氧量[1].在4896个

【相似文献】