复合型PGPR和苜蓿对新垦地土壤培肥效果研究
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国家高技术研究发展计划(863计划)


Effects of PGPR and alfalfa on soil building of newly-reclaimed land
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    摘要:

    本文研究了利用根际有益微生物和豆科植物相结合培肥新垦地土壤的效果。试验采用裂区设计法研究了重庆北碚新垦坡耕地中性土壤上种植紫花苜蓿并接种根瘤菌和其他根际有益微生物(PGPR)(如联合固氮菌、解磷菌和解钾菌等)对土壤养分的影响。结果显示:接种根瘤菌+其他PGPR的处理对土壤有机质、全N、全P、全K、有效P和有效K的提高均达到显著水平,较只接种根瘤菌的处理分别提高33.5%、22.7%、3.8%、11.5%、11.4%和22.3%,比不接种根瘤菌和PGPR的处理分别高42.2%、58.8%、8%、12.6%、37.2%和40.2%,接种根瘤菌+其他PGPR的效果优于只接种根瘤菌和不接种的。同时,上述处理对豆科植物苜蓿植株瘤重、株高、根鲜重、地上部鲜重以及植株全氮含量的提高均达到显著水平,比只接种根瘤菌的处理分别高44.5%、33.2%、77.3%、76.7%和17.7%。将苜蓿和相应的PGPR两者联合使用有更好的土壤改良效果,加速了新垦地贫瘠土壤的培肥过程。

    Abstract:

    Effect of planting legume crops and inoculation of Plant Growth Promoting Rhizobacteria (PGPR) and legumes on soil building in newly-reclaimed land was studied with a field experiment laid out in a newly-reclaimed slopeland in Beibei, Chongqing, China. The experiment field was divided into several plots, which were all planted with alfalfa, but inoculated separately with nil, rhizobia or rhizobia + other PGPR (including associative azotobacters, P-releasing bacteria, and K-releasing bacteria). Results show that the incubation of rhizobium and PGPR in combination significantly increased organic matter, total N, total P and total K, available P and available K in the soil, by 33.5%, 22.7%, 3.8%, 11.5%, 11.4% and 22.3%, respectively, over the incubation of rhizobia alone and by 42.2%, 58.8%, 8%, 12.6%, 37.2% and 40.2%, respectively, over the treatment of no incubation. Furthermore, the treatment of rhizobium + PGPR also significantly increased the nodule weight, plant height, fresh root weight, fresh aboveground biomass and plant’s total nitrogen by 44.5%, 33.2%, 77.3%, 76.7% and 17.7% respectively over the treatment of rhizobia. It is obvious that plant alfalfa in combination of incubation of proper PGPR has a much better effect on soil building, thus accelerating the process of ameliorating newly-reclaimed poor land.

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韩光,张磊,邱勤,石杰,胡正峰.复合型PGPR和苜蓿对新垦地土壤培肥效果研究[J].土壤学报,2011,48(2):405-411. DOI:10.11766/trxb201006120240 hanguang. Effects of PGPR and alfalfa on soil building of newly-reclaimed land[J]. Acta Pedologica Sinica,2011,48(2):405-411.

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  • 收稿日期:2010-06-12
  • 最后修改日期:2010-10-23
  • 录用日期:2010-11-01
  • 在线发布日期: 2010-12-17
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