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在塔里木河下游生态与植被恢复监测实验站,对不同灌溉量(高灌、中灌、低灌)下多枝柽柳(Tamarixramosissima)幼苗根际微生物数量进行了研究,并分析了多枝柽柳幼苗根际微生物数量与土壤因子的关系。结果表明,多枝柽柳幼苗根际细菌、放线菌的数量随着灌溉量的增加呈先增加后减少的变化趋势;根际真菌的数量随着灌溉量的增加而逐渐减少;除高灌溉量下根际放线菌数量的季节变化无显著性差异外,3种灌溉量下多枝柽柳幼苗根际细菌、放线菌、真菌数量在不同季节之间均存在着显著的差异;3种灌溉量下多枝柽柳幼苗根际微生物的数量与pH值和全盐均呈负相关性,与全P有显著的正相关性;低灌溉量下柽柳幼苗根际细菌的数量与全P、有效P呈极显著的正相关,与有机质、全N呈显著的正相关。
The number of rhizosphere microbes in Tamarix ramosissima seedlings under different irrigation amount (high irrigation, middle irrigation, low irrigation) was studied in the monitoring station of ecological and vegetation restoration in the lower reaches of Tarim River. Relationship between microbial quantity and soil factors. The results showed that the number of rhizosphere bacteria and actinomycetes increased firstly and then decreased with the increase of irrigation amount. The number of fungi in rhizosphere decreased with the increase of irrigation amount. In addition to the high irrigation amount There were significant differences in rhizosphere bacteria, actinomycetes and fungi numbers in different seasons among the three kinds of irrigation volume under the three kinds of irrigation. There were significant differences among the three seasons The amount of rhizosphere microbes in T. ramosissima seedlings was negatively correlated with pH and total salt, and had a significant positive correlation with total P. Under low irrigation, the number of rhizosphere bacteria in T. aestivum seedlings was significantly correlated with total P, available P There was a significant positive correlation between them and organic matter and total N.