Improving dryland maize productivity and water efficiency with heterotrophic ammonia-oxidizing bacteria via nitrification and cytokinin activity  

作　　者：Xiaoling Wang Jiawei Cao Runhong Sun Wei Liu Lin Qi Peng Song Shenjiao Yang 

机构地区：[1]College of Agronomy,Henan University of Science and Technology,Luoyang 471003,Henan,China [2]Institute of Plant Protection Research,Henan Academy of Agricultural Sciences,Zhengzhou 450099,Henan,China [3]Farmland Irrigation Research Institute,Chinese Academy of Agricultural Sciences,Xinxiang 453000,Henan,China

出　　处：《The Crop Journal》2024年第3期880-887,共8页作物学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(U1304326);the Natural Science Foundation of Henan Provincial(242300421242)。

摘　　要：A two-year field experiment conducted under dryland conditions in semi-humid and drought-prone regions of China aimed to assess the effect of ammonia-oxidizing bacterial on maize water use efficiency and yield.A heterotrophic ammonia-oxidizing bacteria(HAOB)strain S2_8_1 was used.Six treatments were applied:(1)no irrigation+HAOB strain(DI),(2)no irrigation+blank culture medium(DM),(3)no irrigation control(DCK),(4)irrigation+HAOB(WI),(5)irrigation+blank culture medium(WM),and(6)irrigation control(WCK).Results revealed that HAOB treatment increased maize growth,yield,and water use efficiency over controls,regardless of whether the year was wet or dry.This improvement was attributed to the accelerated nitrification in the rhizosphere soil due to HAOB inoculation,which subsequently led to increased levels of leaf cytokinins.Overall,these findings suggest that HAOB inoculation holds promise as a strategy to boost water use efficiency and maize productivity in dryland agriculture.

关 键 词：Heterotrophic ammonia-oxidizing bacteria Rhizosphere soil nitrification CYTOKININ MAIZE Dryland agriculture 

分 类 号：S513[农业科学—作物学]