Localized nutrient supply promotes maize growth and nutrient acquisition by shaping root morphology and physiology and mycorrhizal symbiosis
文献类型： 外文期刊
作者： Zhang, Aiping 1 ; Wang, Xin-Xin 2 ; Zhang, Deshan 4 ; Dong, Zhijie 1 ; Ji, Hui 1 ; Li, Hongbo 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
2.Hebei Agr Univ, State Key Lab North China Crop Improvement & Regul, Baoding 071001, Hebei, Peoples R China
3.Hebei Agr Univ, Mt Area Res Inst, Baoding 071001, Peoples R China
4.Shanghai Acad Agr Sci, Inst Ecol Environm Protect Res, Shanghai 201403, Peoples R China
关键词： Nutrient heterogeneity; Foraging strategy; Root proliferation; Rhizosphere process; Hypha length density
期刊名称：SOIL & TILLAGE RESEARCH （ 影响因子：7.366； 五年影响因子：7.829 ）
ISSN： 0167-1987
年卷期： 2023 年 225 卷
页码：
收录情况： SCI
摘要： Localized nutrient supply can induce maize (Zea mays L.) root proliferation, and then promote nutrient uptake. Yet, how maize plants adjust root morphology, physiology and mycorrhizal symbiosis to efficiently capture nutrients in different heterogeneous environments remains largely unknown. A 2-year field experiment with maize was conducted with localized application of ammonium (N, nitrogen) and phosphorus (P) (LNP); N and P mixed with controlled-release fertilizer (LCF); N and P mixed with organic fertilizer (LOF); diammonium phosphate (LADP) or broadcast N and P application. Our results showed that root length density was 230-584 % larger, root respiration rate was 97-115 % greater, pH value was decreased by 1.61-1.99 units, activity of acid phosphatase activity was 21-36 % higher, mycorrhizal colonization was 19-35 % lower and hyphal length density was 39-69 % lower in localized compared with broadcast nutrient supply. The root morphological and physiological and mycorrhizal fungi responses were tightly associated with improved maize shoot growth and nutrition accumulation. In addition, localized nutrient application at high nutrient rate (e.g. LCP and LOF treatment) had a more strongly positive effect on root proliferation, shoot growth and/or nutrient accumulation compared with broadcast application, especially at later growth stages of maize. Our findings indicate that localized nutrient application can improve nutrient-use efficiency via strengthening positive cooperativity be-tween root morphological and physiological traits, and shaping trade-off between root growth and mycorrhizal symbioses.
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