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中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (33): 151-155.

所属专题： 玉米

• 农学 农业基础科学 • 上一篇    下一篇

不同种植模式下根分泌物对玉米生物量及氮素吸收的影响

刘小明 雍太文 廖敦平 魏璇 庞家燕 卓富彦 王巧   

  • 收稿日期:2011-05-31 修回日期:2011-10-06 出版日期:2011-12-25 发布日期:2011-12-25
  • 基金资助:

    国家公益性行业（农业）科研专项（nyhyzx07-004-10）、(200803028)和国家大学生创新实验设计项目(编号：091062605)。

Effect of Root Exudates on Biomass and Nitrogen Uptake of Maize under Different Cropping Patterns

  • Received:2011-05-31 Revised:2011-10-06 Online:2011-12-25 Published:2011-12-25

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摘要：

为了探究不同种植模式下根分泌物对玉米氮素吸收的影响，在不同活性炭处理下，通过石英砂培试验，研究大喇叭口期和成熟期玉米生物量及吸氮量在不同种植模式下的变化规律。结果表明：加活性炭处理玉米生物量和吸氮量较未加活性炭处理降低，大喇叭口期总生物量和总吸氮量分别降低16.12%和34.96%，但是成熟期降低不显著。加活性炭下，随着根分泌物被吸附，导致2个时期玉米生物量和吸氮量在2种套作模式之间无显著差异。未加活性炭下，大豆根分泌物提高了玉米的生物量和吸氮量，成熟期玉米/大豆套作处理的玉米总生物量和总吸氮量比玉米净作处理分别高30.58%和71.24%；甘薯根分泌物降低了玉米的生物量和吸氮量，成熟期玉米/甘薯套作处理的玉米总生物量和总吸氮量比玉米净作处理分别低17.14%和8.30%。

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Abstract:

In order to explore effect of root exudates on nitrogen uptake of maize under different cropping patterns, in this study, in the condition of different activated carbon treatment, through the quartz sand culture experiment, study on the changes of a large bell and the maturity period of biomass and nitrogen uptake of maize under different cropping patterns. The results showed that the treatment with adding activated carbon treatment maize biomass and N uptake were decreased than that without, large bell during total biomass and total N uptake were decreased by 16.12% and 34.96%, but not significantly on maturity. Adding activated carbon, as the root exudates were adsorbed, leading to in both periods maize biomass and N uptake Inter-cropping between the two modes was no significant differences. While not adding activated carbon, soybean root exudates increased maize biomass and N uptake, on the maturity total biomass and total N uptake of maize under maize/soybean model were higher than maize net by 30.58% and 71.24%. Sweet potato root exudates reduced maize biomass and nitrogen uptake, the maturity under maize /sweet potato model in total biomass and total N uptake were lower than maize net by 17.14% and 8.30%.