氮营养与AM真菌协同对玉米生长及土壤肥力的影响

发布时间：2018-05-05 17:55

本文选题：氮营养 + 丛枝菌根　；参考：《江苏农业学报》2017年02期

【摘要】：针对东部草原煤矿区土壤贫瘠、生物种群单一以及植物抗逆性差等问题,采用盆栽方法研究了施氮(0mg/kg、100 mg/kg)与接种丛枝菌根(AM)真菌(0 g/kg、50 g/kg)协同对玉米生长状况、抗逆性和根际土壤化学性状的影响。结果表明,单施氮、单接种AM真菌、联合施氮和接种AM真菌显著提高玉米干质量23%~62%,全株氮吸收量77%~538%,磷吸收量39%~191%,钾吸收量42%~135%。其中,施氮+接种AM真菌处理效果最好。同时,3个处理也显著提高叶片可溶性糖含量、降低相对电导率和脯氨酸含量,增强了其抗逆性。其中施氮+接种AM真菌处理的可溶性糖含量最高,相对电导率最低,单施氮处理的脯氨酸含量最低。同一施氮水平下,接种AM真菌显著降低土壤pH值,却显著增加了土壤电导率、速效磷含量、速效钾含量、土壤总球囊霉素(T-GRSP)含量和易提取球囊霉素(EE-GRSP)含量。与单接AM真菌处理相比,施氮+接种AM真菌处理能显著提高土壤电导率、速效钾含量和土壤易提取球囊霉素含量。综合来说,氮肥与AM真菌协同处理有利于促进菌根效应的发挥,促进玉米生长,有效改善土壤肥力,这为菌根肥料应用于东部矿区以进行微生物复垦和生态恢复提供了依据。
[Abstract]:In view of the problems of poor soil, single biological population and poor plant resistance in the eastern grassland coal mining area, a pot experiment was conducted to study the synergistic effect of 0 mg / kg ~ (-1) N ~ (2 +) ~ (0 mg 路kg ~ (-1) 路kg ~ (-1) on maize growth in combination with inoculated mycorrhizal fungi (0 g / kg ~ (50 g 路kg ~ (-1). Effects of stress resistance and rhizosphere soil chemical properties. The results showed that applying nitrogen alone, inoculating AM fungi alone, combined application of nitrogen and inoculation of AM fungi significantly increased the dry weight of maize by 23% and 622.The total nitrogen uptake of the whole plant was 775385.The absorption of phosphorus was 39191.The amount of potassium uptake was 42135. Among them, nitrogen application inoculated with AM fungi had the best effect. At the same time, the three treatments also significantly increased leaf soluble sugar content, reduced relative electrical conductivity and proline content, and enhanced their resistance to stress. The soluble sugar content was the highest, the relative conductivity was the lowest, and the proline content was the lowest in the AM fungi inoculation with nitrogen application alone. At the same nitrogen application level, inoculation with AM fungi significantly decreased soil pH value, but significantly increased soil electrical conductivity, available phosphorus content, available potassium content, total balloon mycin T-GRSPs content and easy to extract balloon mycin EE-GRSPs content. Compared with the single inoculated AM fungi treatment, the soil electrical conductivity was significantly increased, the available potassium content and the content of ball-mycin were easily extracted by inoculating AM fungi with nitrogen. In general, the synergistic treatment of nitrogen fertilizer and AM fungi can promote the mycorrhizal effect, promote maize growth and improve soil fertility effectively, which provides the basis for the application of mycorrhizal fertilizer to the eastern mining area for microbial reclamation and ecological restoration.
【作者单位】： %E7%85%A4%E7%82%AD%E8%B5%84%E6%BA%90%E4%B8%8E%E5%AE%89%E5%85%A8%E5%BC%80%E9%87%87%E5%9B%BD%E5%AE%B6%E9%87%8D%E7%82%B9%E5%AE%9E%E9%AA%8C%E5%AE%A4;" target="_blank">中国矿业大学<北京>煤炭资源与安全开采国家重点实验室;
【基金】：国家重点研发计划项目(2016YFC0501106) 国家自然科学基金项目(51574253)
【分类号】：S158;S513

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