耐盐固氮菌菌株接种对小麦（Triticum aestivum L.）生长的刺激作用。
Plant growth stimulation of wheat (Triticum aestivum L.) by inoculation of salinity tolerant Azotobacter strains.
机构信息
Department of Microbiology, College of Basic Sciences & Humanities, CCS Haryana Agricultural University, Hisar, 125 004 India.
出版信息
Physiol Mol Biol Plants. 2013 Oct;19(4):515-9. doi: 10.1007/s12298-013-0178-2.
Five salinity tolerant Azotobacter strains i.e., ST3, ST6, ST9, ST17 and ST24 were obtained from saline soils. These Azotobacter strains were used as inoculant for wheat variety WH157 in earthen pots containing saline soil under pot house conditions, using three fertilizer treatment doses i.e., control (no fertilizer, no inoculation), 90 Kg N ha(-1) and 120 Kg N ha(-1). Inoculation with salinity tolerant Azotobacter strains caused significant increase in total nitrogen, biomass and grain yield of wheat. Maximum increase in plant growth parameters were obtained after inoculation with Azotobacter strain ST24 at fertilization dose of 120 kg N ha(-1) and its inoculation resulted in attaining 89.9 cms plant height, 6.1 g seed yield, 12.0 g shoot dry weight and 0.7 % total nitrogen. The survival of Azotobacter strain ST24 in the soil was also highest in all the treatments at 30, 60 and 90 days after sowing (DAS). However, the population of Azotobacter decreased on 90 DAS as compared to counts observed at 60 DAS at all the fertilization treatments.
从盐渍土中获得了 5 株耐盐固氮菌菌株，即 ST3、ST6、ST9、ST17 和 ST24。这些固氮菌菌株被用作盆栽土壤中温室条件下小麦品种 WH157 的接种物，使用了三种施肥处理剂量，即对照（无肥、无接种）、90 Kg N ha(-1) 和 120 Kg N ha(-1)。耐盐固氮菌菌株的接种显著增加了小麦的总氮、生物量和籽粒产量。在 120 kg N ha(-1) 的施肥剂量下接种固氮菌 ST24 后，植物生长参数的最大增加，其接种导致获得 89.9 cms 株高、6.1 g 种子产量、12.0 g 地上部干重和 0.7%的总氮。在所有处理中，固氮菌 ST24 在播种后 30、60 和 90 天时（DAS）在土壤中的存活率也是最高的。然而，与所有施肥处理在 60 DAS 时的计数相比，固氮菌的数量在 90 DAS 时减少了。
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