摘要
人工橡胶林栽培是海南特色农业,相对于一般的大田作物,其施肥量与施肥频率差别很大。而氨气挥发是造成氮肥直接损失的一个重要原因。本研究在海南岛人工橡胶林地利用静态箱自动采样测定了2010和2011年两年内4次施肥后NH3的挥发量。结果表明,施肥后第2天即有氨的挥发,最高值出现在施肥后第7天,此后氨气挥发量迅速降低,20天后基本上检测不到。研究发现,氨的总挥发量与施肥后25天内的土壤积温呈正相关,同时特殊天气,如海南特有的台风会显著增加氨的挥发量。统计结果表明,氨挥发损失率最高可达到氮肥施用量的10%。因此如何改进原有的施肥方法以提高氮肥利用率也是今后需要注意的问题。
Para rubber （Hevea brasiliensis） plantation is the important agriculture in Hainan Island. The demand of the rubber industry forced the yield of fresh rubber and caused the increase of the fertilization, which was different from that in crop fields. The collection of ammonia was carried out after the fertilization in four experiments from 2010 to 2011. The results showed that the volatilization of ammonia was detected in the second day after fertilization. The peak of the volatilization was in the seventh day after fertilization. No detection of ammonia volatilization was found after 20th day. It was found that the total volatilization of ammonia was related to the accumulated temperature of the soil. The special climate, such as typhoon, had great impact on the increase of ammonia volatilization. The total loss of nitrogen by ammonia volatilization accounted to about 10% of the N fertilizer, which indicated that the improvement of fertilization method should be taken to decrease the N loss.
出处
《土壤》
CAS
CSCD
北大核心
2014年第3期466-469,共4页
Soils
基金
国家自然科学基金项目(31171505)
现代农业产业技术体系建设专项资金项目(CARS-34-GW10)资助
关键词
氨挥发
人工橡胶林
海南
Ammonia volatilization, Rubber plantation, Hainan
