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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (13): 219-224.

所属专题： 小麦

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

UV-B辐射增强下施氮对大麦土壤微生物量碳、氮的影响

娄运生 程焕友   

  • 收稿日期:2010-02-26 修回日期:2010-04-02 出版日期:2010-07-05 发布日期:2010-07-05
  • 基金资助:

    国家自然科学基金

Effects of enhanced ultraviolet-B radiation and nitrogen levels on microbial biomass carbon and nitrogen in barley

  • Received:2010-02-26 Revised:2010-04-02 Online:2010-07-05 Published:2010-07-05

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摘要：

通过田间试验，研究了UV-B辐射增强下不同施氮量对大麦土壤微生物量碳、氮的影响。UV-B辐射设对照（CK）和增强（E）2水平，施氮量设高、中、低3水平，分别为30、150和300 kg N/ha。结果表明：与对照相比，无论施氮量高低，UV-B辐射增强对非根际土壤微生物量碳、氮含量有促进作用；除低氮外，UV-B辐射增强对根际土壤微生物量碳、氮含量有抑制作用。在一定UV-B辐射强度下，高施氮量会降低根际土壤微生物量氮和非根际土微生物量碳、氮含量。

关键词: 细极链格孢菌（Alternaria tenuissima）, 细极链格孢菌（Alternaria tenuissima）, cDNA, 酵母表达文库

Abstract:

Field experiment with barley was conducted to investigate the dynamics of soil microbial biomass C and N as affected by enhanced ultraviolet-B radiation and N supply. The experiment was designed with 2 levels of UV-B radiation and 3 levels of N supply, i.e. 30, 150 and 300 kg N ha-1. The results indicated that, compared with control, enhanced UV-B radiation increased microbial biomass C and N in non-rhizospheric soil, regardless of N supply levels; but decreased microbial biomass C and N in rhizospheric soil, except for low N supply level. Irrespective of UV-B radiation, high N supply level depressed microbial biomass N in rhizospheric soil as well as microbial biomass C and N in non-rhizospheric soil.