Effect of Coated Diammonium Phosphate Combined with Paecilomyces variotii Extracts on Soil Available Nutrients, Photosynthesis-Related Enzyme Activities, Endogenous Hormones, and Maize Yield

作者：Guohua Ma, Qi Chen, Ruolin Shi, Bo Kong, Dayin Chen, Zixin Zhang, Xinzhu Li, Zhaoming Qu, Mingyang Li, Min Zhang, Zhiguang Liu · 发表于：ACS Omega · 年份：2022 · DOI：10.1021/acsomega.2c02102 · 被引用次数：12 · 研究领域：Plant nutrient uptake and metabolism、Plant Growth Enhancement Techniques、Polymer-Based Agricultural Enhancements

High Resolution Image Download MS PowerPoint Slide Coated diammonium phosphate (CDAP) is intended to release nutrients steadily in response to the demand of crop growth. A novel biostimulant extracted from Paecilomyces variotii has been shown to regulate gene expression in nutrient transport, enhance nitrogen (N) and phosphorus (P) uptake, and improve nutrient use efficiency. The application of CDAP combined with the Paecilomyces variotii extracts (ZNC) in maize is an efficient approach for reducing waste of resources, improving nutrient supply, and maintaining production stability. The effects of CDAP combined with ZNC on photosynthesis, enzyme activities, endogenous hormone content, maize yield, and P use efficiency (PUE) were investigated in this study. In a pot experiment, CDAP and diammonium phosphate (DAP) were tested together with P levels (1.80, 1.44 g pot –1, P 2 O 5 ) and two ZNC application rates (0, 4.4 μg pot –1 ), which included the control treatment that had no P fertilizer added. Results showed that the key influencing elements of maize growth and yield were the soil available-P content, endogenous hormone content, and plant photosynthesis in this study. The combination of DAP and ZNC increased the soil available-P content and the auxin content in leaves at the key stage and hence increased the yield and PUE of maize, compared with DAP. The net photosynthetic rate of CDAP combined with ZNC was higher by 23.1% than that of CDAP alone, as well as by 32.0% than t...