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Agronomy 2017, 7(4), 84; https://doi.org/10.3390/agronomy7040084

Straw Application Strategy to Optimize Nutrient Release in a Southeastern China Rice Cropland

1
Institute of Geography, Fujian Normal University, Fuzhou 350007, China
2
Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350007, China
3
CSIC, Global Ecology CREAF-CSIC-UAB, Cerdanyola del Valles, 08193 Barcelona, Catalonia, Spain
4
CREAF, Cerdanyola del Valles, 08193 Barcelona, Catalonia, Spain
5
Department of Geography and Resource Management, and Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
*
Authors to whom correspondence should be addressed.
Received: 25 October 2017 / Revised: 28 November 2017 / Accepted: 7 December 2017 / Published: 15 December 2017
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Abstract

The management and improvement of paddy soils fertility are key factors for the future capacity of rice production. The return of rice straw to paddy soils is the best alternative to the application of industrial fertilizers for rice production sustainability. The best strategy for applying rice straw to improve soil nutritional capacity during rice growth has not yet been investigated. We compared straw decomposition in the ditches and ridges in paddy fields subjected to a typical crop management in southeastern China. Straw spread on the ridges provided lower residual straw carbon (C) concentration and mass, lower nitrogen:phosphorus ratio N:P, C:N, and C:P ratios, and lower soil salinity, as well as higher temperature, and higher N- and P-release capacity during the rice crop in comparison to the straw spread in the ditches. Therefore, applying rice straw to the ridges is better strategy than applying it to ditches to enhance rice production. View Full-Text
Keywords: China; decomposition; habitats; nitrogen; nutrient release; paddy field; phosphorus; rice straw; stoichiometry China; decomposition; habitats; nitrogen; nutrient release; paddy field; phosphorus; rice straw; stoichiometry
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Wang, W.; Sardans, J.; Wang, C.; Pan, T.; Zeng, C.; Lai, D.Y.F.; Bartrons, M.; Peñuelas, J. Straw Application Strategy to Optimize Nutrient Release in a Southeastern China Rice Cropland. Agronomy 2017, 7, 84.

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