Influence of potassium solubilizing microorganism (Bacillus mucilaginosus) and waste mica on potassium uptake dynamics by sudan grass (Sorghum vulgare Pers.) grown under two Alfisols
Influence of potassium solubilizing microorganism (Bacillus mucilaginosus) and waste mica on potassium uptake dynamics by sudan grass (Sorghum vulgare Pers.) grown under two Alfisols
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DOI：
10.1007/s11104-008-9805-z
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发表时间：
2009-04-01
期刊：
影响因子：
4.9
通讯作者：
Biswas, D. R.
中科院分区：
文献类型：
--
作者：
Basak, B. B.;Biswas, D. R.
本研究的主要目的是研究溶钾微生物（Bacillus mucilaginosus）对废云母钾素释放的影响，并研究其作为钾肥对苏丹草的肥效。var Sudanensis作为试验作物在两种淋溶土下种植。结果表明，与对照（不施钾）相比，施用云母显著提高了苏丹草的生物量、吸收量和钾回收率。生物量产量，吸收和百分比K回收率进一步增加时，云母接种细菌菌株在两种土壤中比未接种云母。来自Hazaribag的Alfisol比来自Bhubaneswar的Alfisol记录了更高的产量、吸收和K回收率。土壤中钾的动态变化表明，接种胶质芽孢杆菌后，两种土壤中的钾都从云母中释放到水溶性钾库和交换性钾库中。显着更大量的水溶性，交换性和非交换性钾保持在Alfisol从Hazaribag比布巴内斯瓦尔。钾的释放动力学研究表明，经菌株处理的云母中钾有明显的释放。苏丹草生物量、吸钾量与土壤钾素库间存在显著相关关系。X射线衍射分析表明，由于接种胶质芽孢杆菌菌株在这两种土壤中的云母更大的溶解。因此，废云母的生物干预是一种将不溶性钾溶于植物有效库并有效利用的替代技术，可作为维持作物生产和保持土壤钾素的钾肥来源。
The main aim of this research was to study the dynamics of K release from waste mica inoculated with potassium solubilizing microorganism (Bacillus mucilaginosus) and to investigate its effectiveness as potassic-fertilizer using sudan grass (Sorghum vulgare Pers.) var Sudanensis as test crop grown under two Alfisols. Results revealed that application of mica significantly enhanced biomass yield, uptake and per cent K recoveries by sudan grass than control (no-K). Biomass yield, uptake and per cent K recoveries increased further when mica was inoculated with bacterial strain in both the soils than uninoculated mica. Alfisol from Hazaribag recorded higher yield, uptake and K recoveries than Alfisol from Bhubaneswar. The dynamics of K in soils indicated that K was released from mica to water-soluble and exchangeable pools of K due to inoculation of mica with Bacillus mucilaginosus in both the soils. Significantly greater amounts of water-soluble, exchangeable and non-exchangeable K were maintained in Alfisol from Hazaribag than Bhubaneswar. Release kinetics of K showed significant release of K from mica treated with bacterial strain. Significant correlation between biomass yield, K uptake by sudan grass and different pools of K in soils were observed. X-ray diffraction analysis indicates greater dissolution of mica due to inoculation of Bacillus mucilaginosus strain in both the soils. Thus, bio-intervention of waste mica could be an alternative and viable technology to solubilize insoluble K into plant available pool and used efficiently as a source of K-fertilizer for sustaining crop production and maintaining soil potassium.