海绿石粉砂岩:氨保留和减少氮挥发损失的添加剂

Carlos Henrique Eiterer de Souza, Miguel Martins Neto, Fábio Aurélio Dias Martins, Débora Silvano Moreira, Victor Gustavo Soares Ribeiro
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摘要

海绿石粉砂岩是一种沉积岩,可以作为生产多营养素肥料的原料,可以与尿素结合以提高其农艺效率。本研究的目的是评价海绿石粉砂岩作为氮肥中氨挥发减少氮损失的添加剂。试验采用随机分组,按时间细分,采用6 × 8因子,4次重复,处理包括海绿石粉砂岩混合物,剂量为100 kg N ha-1(对照,不施氮;常规尿素- 45% N;商品名称为Super N®的商品肥料;尿素添加海绿石粉砂岩:9% N;剩余部分在施肥后3、6、9、12、15、18、24和30 d采集。挥发氨的收集是在半开的自由静态室中进行的。与常规尿素相比,海绿石粉砂岩与尿素的结合使用可将挥发损失从10%减少到27%。尿素加脲酶抑制剂处理挥发速率最低,挥发峰出现时间较晚,为施肥后17 d。海绿石粉砂岩除了为植物提供营养外,还能减少氨的损失。
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Glauconitic Siltstone: additive for ammonia retention and reduction of nitrogen volatilization loss
Glauconitic siltstone is sedimentary rock used as raw material to produce a multinutrient fertilizer that can combine with urea to increase their agronomic efficiency. The purpose of this study was to evaluate glauconitic siltstone as additive to reduce nitrogen losses by ammonia volatilization in nitrogen fertilizers. The experiment used randomized block, in a portion subdivided over time, following a 6 x 8 factorial with four replications and treatments comprising glauconitic siltstone mixture at a dose of 100 kg N ha-1 (control, without the application of nitrogen; conventional urea – 45% N; commercial fertilizer registered with the trade name of Super N®; urea with addition of glauconitic siltstone: 9% N; 20 and 31% N) and the remaining portion divided in the collection time at 3, 6, 9, 12, 15, 18, 24 and 30 days after fertilizer application. The collection of the volatilized ammonia was made in a semi-opened free static chamber. The use of glauconitic siltstone associated with urea provided a reduction in loss by volatilization from 10 to 27% in relation to conventional urea. The treatments with application of urea with the urease inhibitor showed the lowest volatilization rate and delay in the volatilization peak, which occurred 17 days after fertilizer application. In addition to providing nutrients to the plants, glauconitic siltstone reduces ammonia losses.
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