| 伍玉鹏,邓婵娟,姜炎彬,胡荣桂.长期施肥对水稻土有机氮组分及氮素矿化特性的影响[J].农业环境科学学报,2015,34(10):1958-1964. |
| 长期施肥对水稻土有机氮组分及氮素矿化特性的影响 |
| Effects of Long-term Different Fertilization on Fractions and Mineralization of Organic Nitrogen in Paddy Soils |
| 投稿时间：2015-05-29 |
| DOI：10.11654/jaes.2015.10.017 |
| 中文关键词: 水稻土 长期施肥 有机氮组分 土壤氮矿化 湖南 |
| 英文关键词: paddy soil long-term fertilization experiment organic nitrogen fraction soil nitrogen mineralization Hunan Province |
| 基金项目:国家自然科学基金(41171212);"十二五"国家科技支撑计划项目(2014BAK19B00) |
|
| 摘要点击次数: 2666 |
| 全文下载次数: 2316 |
| 中文摘要: |
| 以湖南省3个国家级稻田土壤肥力变化长期定位监测点(新化、宁乡和桃江)的土壤为对象,研究了20年不同土壤培肥方式(不施肥、单施化肥、化肥配施中量/高量猪粪和化肥配施秸秆)对土壤全氮、有机氮组分及氮素矿化的影响.结果显示,与不施肥相比,单施化肥对土壤全氮的影响在新化和宁乡点均不显著,但化肥配施猪粪或秸秆在三个试验点均显著提高了土壤全氮、碱解氮和微生物量氮的含量.总体来看,长期施肥能够提高土壤有机氮各组分的含量,并提高氨基糖氮和氨基酸氮在全氮中的占比,但不同类型肥料施入后对有机氮组分的影响因试验点的不同而异,这可能是不同试验点土壤理化性质差异导致的.相关分析显示土壤酸解有机氮组分与氮矿化势极显著相关,且在三个监测点,有机物配施化肥的处理土壤氮矿化势均高于单施化肥处理.研究表明,虽然土壤性质上的差异可能导致土壤氮组分对施肥措施的响应不同,但有机无机肥配施提高土壤供氮潜力的效果均优于单施化肥. |
| 英文摘要: |
| Applying fertilizers not only improves soil fertility, but may also influence nitrogen transformation in soil. Here the effects of long-term(20 years) different fertilization on total nitrogen(N), organic N components and organic N mineralization in paddy soils were studied at three experimental sites(Xinhua, Ningxiang and Taojiang) in Hunan Province. Fertilization included no fertilizer(CK), chemical fertilizers(NPK), chemical fertilizers plus medium and high amounts of pig manure(MM+NPK and HM+NPK), and chemical fertilizers plus incorporated straw(Str.+NPK). Compared with CK, chemical fertilizers alone did not consistently influence soil total N, alkali-hydrolyzable N and microbial biomass N, but chemical fertilizers plus organic materials(MM+NPK, HM+NPK and Str.+NPK) significantly increased these soil N content in all three experimental sites. In general, the proportions of amino acid N and amino sugar N to total N were improved by long-term fertilization. However, the responses of organic N fractions to fertilization varied in different experimental sites, which may be attributed to the differences in soil properties. Significant positive correlation was observed between hydrolyzable N content and potentially mineralizable N. In all three experiment sites, chemical fertilizer plus organic materials showed a higher potentially mineralizable N than chemical fertilizers alone. In conclusion, soil properties influence the responses of soil organic nitrogen fractions to fertilization, and combined applications of organic and chemical fertilizers show higher soil nitrogen supplying potential than chemical fertilizers alone. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
|
|
|
