低磷对不同基因型谷子生长、磷素积累及根际微生物的影响  

Effects of Low Phosphorus on Growth,Phosphorus Accumulation and Rhizosphere Microorganisms of Different Genotypes of Millet

作　　者：梁颖颖 周俊江 卿桂霞 张富厚[1] 孟超敏[1] Liang Yingying;Zhou Junjiang;Qing Guixia;Zhang Fuhou;Meng Chaomin(College of Agriculture,Henan University of Science and Technology/Henan Dryland Crop Germplasm Resources Utilization Engineering Research Center,Luoyang 471000,Henan)

机构地区：[1]河南科技大学农学院/河南省旱地作物种质资源利用工程研究中心,河南洛阳471000

出　　处：《山东农业科学》2024年第3期92-98,共7页Shandong Agricultural Sciences

基　　金：河南省科技厅科技项目(2018HNCYTPY01)。

摘　　要：为探究不同基因型谷子适应低磷条件的能力,采用盆栽试验,选取长农35、济谷13、济谷11、晋谷21、豫谷18、豫谷35共6个谷子品种为材料,设置正常施磷(P_(N),100 mg/kg P_(2)O_(5))与不施磷(P0)两个处理,比较两种磷水平对各基因型谷子拔节期植株生物量、磷积累、磷转运、根系形态及根际微生物等的影响。结果表明:不施磷处理下,济谷11植株鲜重和地上部干重显著高于其他品种及正常施磷处理下的所有品种,其总根长、总根表面积、总根体积均高于P_(N)处理,且前2个指标值差异显著;长农35、济谷13、晋谷21、豫谷18及豫谷35的生物量及根系形态指标值基本低于各自P_(N)处理;长农35、晋谷21、豫谷18植株磷积累总量较各自P_(N)处理分别显著降低12.99%、28.13%、50.27%,济谷13、济谷11、豫谷35植株磷积累总量两种磷水平处理下差异不显著;济谷13地上部磷素分配比例P_(0)较P_(N)处理显著降低4.04%、根部显著增加18.97%,其他品种地上部及根部磷素分配比例较各自P_(N)处理差异不显著;济谷11和豫谷35在P_(0)处理下对叶的分配比例显著增大,而对茎的分配比例显著减少。不同基因型谷子在两种磷水平处理下根际可培养微生物数目存在较大差异,不施磷处理下长农35、晋谷21根际土壤的细菌及真菌数量较高且显著高于各自P_(N)处理,而济谷11的细菌及放线菌数量两种磷水平下均较低。综合而言,济谷11和济谷13对低磷环境的适应性较好。In order to explore the ability of different genotypes of millet to adapt to low phosphorus(P)condition,six millet varieties including Changnong 35,Jigu 13,Jigu 11,Jingu 21,Yugu 18 and Yugu 35were selected as the research materials to determine biomass,P accumulation,P transport,root morphologyand rhizosphere microorganisms under normal P application(P_(N),100 mg/kg P_(2)O_(5))and no P(P0)treatment.The results showed that under P0 treatment,the whole plant fresh weight and aboveground part dry weight ofJigu 11 were significantly higher than those of the other varieties and those under P_(N)treatment;its total rootlength,total root surface area and total root volume were higher compared with P_(N)treatment,and the formertwo reached significant level.The biomass and root morphological characters of Changnong 35,Jigu 13,Jingu 21,Yugu 18 and Yugu 35 were basically lower under P0 treatment compared with P_(N)treatment.The plant Paccumulation amount of Changnong 35,Jingu21 and Yugu 18 under P0 treatment significantly decreased by12.99%,28.13%and 50.27%compared with P_(N)treatment,while that of Jigu 13,Jigu 11 and Yugu 35 wasnot significantly different between the two P treatments.The P allocation proportion in aboveground part of Jigu13 significantly decreased by 4.04%under P0 treatment compared with P_(N)treatment,while that in roots significantly increased by 18.97%;the P allocation proportion in aboveground part and roots of the other varietieshad no significant difference between the two P treatments;Jigu 11 and Yugu 35 significantly increased the Pallocation proportion in leaves under P_(0) treatment,but significantly decreased in stem.There were larger differences in the number of culturable rhizosphere microorganisms among different millet varieties under the two Ptreatments.The bacteria and fungi quantity in rhizosphere soil of Changnong 35 and Jingu 21 were significantlylarger under P0 treatment than those under P_(N)treatment,and the bacteria and actinomycetes quantity of Jigu11 were lower.In a word,Jigu 11 a

关 键 词：谷子品种 低磷 磷素积累 根系形态 根际微生物 

分 类 号：S515.01[农业科学—作物学]