Impacts of Bioinoculants Pseudomonas jesenii MP1 and Rhodococcus qingshengii S10107 on Chickpea (Cicer arietinum L.) Yield and Soil Nitrogen Status  

作　　者：Divya JOSHI Ramesh CHANDRA Deep Chandra SUYAL Saurabh KUMAR Reeta GOEL 

机构地区：[1]Department of Microbiology, College of Basic Sciences and Humanities, Govind Ballabh Pant University of Agriculture and Technology, Pantnag ar-263145, Uttarakhand (India) [2]Department of Soil Science, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar- 263145, Uttarakhand (India)

出　　处：《Pedosphere》2019年第3期388-399,共12页土壤圈（英文版）

基　　金：support from the Science and Engineering Research Board (SERB) young scientist scheme (No.YSS/2015/001214);Senior Research Fellowship (Council of Scientific and Industrial Research Award No. 09/171(0126)/2015-EMR-I) to Mr. Saurabh Kumar

摘　　要：Cold-adapted bioinoculants are considered as harbingers of sustainable hill agriculture. Therefore, two previously characterized psychrotolerant diazotrophs, Pseudomonas jesenii MP1 and Rhodococcus qingshengii S10107, were evaluated for their plant growthpromoting potential for chickpea (Cicer arietinum L.) grown under natural field conditions. Comparative analysis of agronomical and biochemical crop parameters revealed the irrelevance of chemical fertilizers for chickpea production;the diazotrophs alone were sufficient to fulfil the crop's nutritional requirement. However, the integrated use of bacterial strains in combination with urea at 20 kg N ha^-1 as urea was being recommended for higher crop yield and better soil nitrogen status. Quantitative polymerase chain reaction (qPCR) and denaturing gradient gel electrophoresis (DGGE)-based soil bacterial dynamics unveiled the persistence of both diazotrophs until the end of the crop maturation period without affecting the native micro-flora. Therefore, these bioinoculants can be explored as natural nitrogen resource, and an additional incentive in their bio-formulation will be a step towards agricultural sustainability.Cold-adapted bioinoculants are considered as harbingers of sustainable hill agriculture. Therefore, two previously characterized psychrotolerant diazotrophs, Pseudomonas jesenii MP1 and Rhodococcus qingshengii S10107, were evaluated for their plant growth-promoting potential for chickpea（Cicer arietinum L.） grown under natural field conditions. Comparative analysis of agronomical and biochemical crop parameters revealed the irrelevance of chemical fertilizers for chickpea production; the diazotrophs alone were suffcient to fulfil the crop’s nutritional requirement. However, the integrated use of bacterial strains in combination with urea at 20 kg N ha-1 as urea was being recommended for higher crop yield and better soil nitrogen status. Quantitative polymerase chain reaction（qPCR） and denaturing gradient gel electrophoresis（DGGE）-based soil bacterial dynamics unveiled the persistence of both diazotrophs until the end of the crop maturation period without affecting the native micro-flora. Therefore, these bioinoculants can be explored as natural nitrogen resource, and an additional incentive in their bio-formulation will be a step towards agricultural sustainability.

关 键 词：agricultural sustainability denaturing gradient gel ELECTROPHORESIS (DGGE) hill agriculture psychrotolerance N fertilizer N fixation N uptake quantitative POLYMERASE chain reaction (qPCR) 

分 类 号：P[天文地球]