Agriculture

Effect of straw and inhibitors on the fate of nitrogen applied to paddy soil

C. Yu, X. Xie, et al.

This groundbreaking pot experiment explored how different fertilizer treatments impact nitrogen distribution and rice yields in paddy soils. Conducted by a team of experts including Chunxiao Yu and Xueshi Xie, the findings suggest that incorporating urease and nitrification inhibitors, along with straw, could be the key to maximizing rice yield in Northeast China.

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Abstract

This pot experiment investigated the distribution of fertilizer nitrogen (N) and agronomic effects in a paddy soil-rice system using five treatments: control (C), urea (U), urea + straw (US), urea + urease + nitrification inhibitor (UI), and urea + urease + nitrification inhibitor + straw (UIS). Straw addition (US and UIS) significantly increased soil and urea-derived microbial biomass N, highlighting the role of biotic processes in N retention. Around 10% of urea-N was recovered as fixed ammonium (FA), subsequently released at tillering and maturation. US decreased rice yield and N uptake compared to U, while UIS mitigated this reduction. UIS is suggested as the optimal management strategy in Northeast China paddy soils, but economic and field-scale validations are needed.

Publisher

Scientific Reports

Published On

Dec 09, 2020

Authors

Chunxiao Yu, Xueshi Xie, Hengzhe Yang, Lijie Yang, Wentao Li, Kaikuo Wu, Weiming Zhang, Chen Feng, Dongpo Li, Zhijie Wu, Lili Zhang

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