| 张玉树,丁洪,王飞,郑祥洲,翁伯琦,林诚,张晶.长期施用不同肥料的土壤有机氮组分变化特征[J].农业环境科学学报,2014,33(10):1981-1986. |
| 长期施用不同肥料的土壤有机氮组分变化特征 |
| Characteristics of Organic Nitrogen Fractions in Soils Under Long-term Different Fertilization |
| 投稿时间：2014-08-11 |
| DOI：10.11654/jaes.2014.10.015 |
| 中文关键词: 长期定位试验 施肥 有机氮组分 |
| 英文关键词: long-term field experiment fertilization organic nitrogen fraction |
| 基金项目:国家自然科学基金项目（41401339，31270556）；福建省自然科学基金项目（2014J01145）；公益性行业（农业）科研专项（201003014-6-1-2，201203030）；福建省科技重大专项（2012NZ0002） |
|
| 摘要点击次数: 2742 |
| 全文下载次数: 2839 |
| 中文摘要: |
| 采用Bremner有机氮分级方法研究了30年施用不同肥料的长期定位试验耕层土壤有机氮组分变化特征。结果表明，与不施肥（CK）处理相比，长期施用不同肥料均提高了耕层土壤全氮和有机氮含量，所增加的有机氮中酸解性氮和非酸解性氮各占一半左右，其中增加的酸解性氮有69.0%为未知态氮，21.0%为氨基酸氮，6.6%为氨基糖氮，3.4%为氨态氮。与单施化肥（NPK）相比，牛粪/稻草与化肥配施能进一步提高土壤全氮和有机氮含量，但是不同种类的有机肥与化肥配施所增加有机氮的组分有明显差异；其中牛粪与化肥配施处理（NPKM）所增加的有机氮有60.0%为酸解性氮，而稻草与化肥配施处理（NPKS）中所增加的有机氮有71.7%为非酸解性氮。牛粪与化肥长期配施有利于提高土壤酸解性氮含量，而稻草与化肥配施则有利于提高非酸解性氮含量。 |
| 英文摘要: |
| A better understanding of organic nitrogen(N) fractions in soils under long-term fertilization is critical to the regulation of N fertilizers and eco-environmental quality. In this study, a organic N fractionation method by Bremner was used to examine the characteristics of soil organic N fractions under long-term applications of different fertilizers. Compared to no fertilizer(CK) treatment, total N and organic-N in soils increased under long-term fertilization. About half of the increased organic-N was acid-hydrolysable N and the rest was non-acid hydrolysable N. Of the increased acid hydrolysable N, hydrolysable unidentified N, amino acid N, amino sugar N and ammonia N accounted for about 69.0%, 21.0%, 6.6%, and 3.4%, respectively. Total N and organic-N in the soils applied with organic fertilizers plus chemical fertilizers were higher than those with chemical fertilizer alone. However, organic-N fractions changed differently under different organic fertilizers. In the soils applied with cattle manure combined with chemical fertilizers(NPKM), about 60.0% of the increased organic-N was acid-hydrolysable N, while 71.7% was non-acid hydrolysable N in the soils with straw plus chemical fertilizers(NPKS). These results indicate that the composition of organic materials would have great impact on the fractions and availability of organic N in soils. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
|
|
|
