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首页> 外文会议>World Congress of Soil Science >Effect of different genotypes of flue-cured tobaccos and different culture methods on k nutrition in rhizospheric and non-rhizospheric soils
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Effect of different genotypes of flue-cured tobaccos and different culture methods on k nutrition in rhizospheric and non-rhizospheric soils

机译：不同基因型对叶片和不同培养方法对流动性和非流离子石土的钾营养的影响

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The experiment was carried out to investigate the effect of Cation Exchange Capacity (CEC) on the variation of readily available K content and non-exchangeable K content in rhizospheric and non-rhizospheric soils with three different genotypes (i.e. Nongda 202, K326 and NC89) of flue-cured tobaccos (Nicotiana tabacum L.) in soil and sand culture. The activating effects of root exudates and population of rhizospheric microbes on K content of soil was also investigated. Results show that the readily available K content in both rhizospheric and non-rhizospheric soils varies for difference genotypes, i.e. Nongda202> K326 >NC89. Root exudates activate K content in the soil to different levels with maximum activation observed for Nongda202. The differenceis significant among all three genotypes. The fungi population in the rhizospheric soils is larger compared to that in non-rhizospheric soils for all three genotypes. There were significantly higher firngi populatiosn in Nongda202 rhizospheric soils than that of K326 and NC89. The difference between latter two was not significant. The difference in population was significant in rhizospheric bacteria but not in actinomycete. Nongda 202 shows better CEC than NC89 and K326 with insignificant difference between latter two. Therefore, the physiological properties of the roots should be taking into account when breeding K-enriching tobacco varieties.
机译：进行实验以研究阳离子交换能力（CEC）对具有三种不同基因型（即NONGDA 202，K326和NC89）的疏流物和非流离变性土壤中易用K含量和不可交换k含量的变化的影响土壤与沙滩培养的烤烟（尼古利亚塔Tabacum L.）。还研究了根渗出物和疏散性微生物群的激活效果。结果表明，疏流器和非流际土壤中的易于可用的K含量因差异基因型而变化，即NongDA202> K326> NC89。根部渗出在土壤中激活k含量以对Nongda202的最大激活的不同水平。所有三种基因型中的差异都显着。与所有三种基因型的非流离虫层土壤相比，脱钻土壤中的真菌人群更大。 Nongda202脱菱菌土壤中有明显高于K326和NC89的脱喉土壤。后两者之间的差异并不重要。遗传学细菌中群体的差异是显着的，但不含放线菌。 Nongda 202显示比NC89和K326更好的CEC，后者两者之间的差异微不足道。因此，当繁殖K-富含烟草品种时，应考虑根的生理特性。

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