Grain yield, plant nitrogen content and nitrogen use efficiency as affected by controlled-release urea and straw biochar in a rice field

A - Papers appearing in refereed journals

Xin, Y., Ping, Y., Jue, L., Yujie, Z., Shuifeng, Y., Xiaotao, M., Jianqiu, C. and Haefele, S. M. 2021. Grain yield, plant nitrogen content and nitrogen use efficiency as affected by controlled-release urea and straw biochar in a rice field. Journal of Plant Nutrition. https://doi.org/10.1080/01904167.2021.2014884

AuthorsXin, Y., Ping, Y., Jue, L., Yujie, Z., Shuifeng, Y., Xiaotao, M., Jianqiu, C. and Haefele, S. M.
Abstract

Resulting from the positive effect on rice productivity, the application of biochar and controlled-release urea in the form of polymer-coated urea (PCU) in crop production attracts more and more interest. However, field studies considering the combined effect of biochar and PCU are rare. This 2-year study examined the combined effects of biochar and PCU on yield, yield components, plant height, plant nitrogen concentration and nitrogen recovery efficiency in a waterlogged rice field. Experimental treatments combined two biochar rates (0 and 2800 kg ha−1) and three nitrogen rates (0, 120 and 180 kg N ha−1). The results showed a yield decrease under biochar application without nitrogen fertilizer. The application of 120 kg N ha−1 PCU and biochar had the highest yield in 2017. No significant differences of grain yields were indicated between 120 and 180 kg N ha−1. High grain yield and nitrogen use efficiency was obtained with 120 kg N ha−1 PCU. Therefore, 120 kg N ha−1 PCU can be recommended for rice production in this area.

KeywordsCoated urea; Fertilizer; Nitrogen use efficiency; Super hybrids
Year of Publication2021
JournalJournal of Plant Nutrition
Digital Object Identifier (DOI)https://doi.org/10.1080/01904167.2021.2014884
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeS2N - Soil to Nutrition - Work package 1 (WP1) - Optimising nutrient flows and pools in the soil-plant-biota system
Output statusPublished
Publication dates
Online15 Dec 2021
Publication process dates
Accepted01 Jun 2021
ISSN0190-4167
PublisherTaylor & Francis Inc

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