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- W4308981388 abstract "Applying straw to agricultural production to improve soil productivity and crop yields is significant. However, the straw-only application is possibly not a practical choice for achieving environmental protection and high yield. This study evaluated the applicability of straw combined with biochar to the paddy field. Two-year pot experiments were conducted to examine the effect of straw combined with different proportions (0, 5, 20, 40 t ha-1) of biochar on soil nitrogen retention, phosphorous availability, rice yield, and physiological parameters. Five treatments were included: control (CK), 7 t ha-1 straw + 0 t ha-1 biochar (ST), 7 t ha-1 straw + 5 t ha-1 biochar (SC1), 7 t ha-1 straw + 20 t ha-1 biochar (SC2), 7 t ha-1 straw + 40 t ha-1 biochar (SC3). The results indicated that the biochar had an encouraging effect on paddy fields with straw returning: (1) SC3 treatment significantly increased ammonium nitrogen (NH4+-N) and nitrate nitrogen (NO3--N) content in soils compared to ST, increasing by 30.19% and 42.72%, while SC2 treatment increased by 25.84% and 30.40%, respectively; (2) Regarding soil phosphorus availability, ST treatment showed a negative effect, while proper biochar application rate (20 t ha-1) effectively increased Olsen-P content (18.24%); (3) No significant difference among these treatments was observed in the photosynthetic characteristics. Notably, 20 t ha-1 biochar application (SC2) effectively enhanced rice components (stem, ear) dry biomass, improved rice yield (10.14%), and Harvest index (HI: 4.99%). Hence, the appropriate rate (20 t ha-1) of biochar combined with straw (7 t ha-1) returning is a promising strategy for increasing nitrogen retention and phosphorous availability, alleviating N and P losses and promoting rice growth and yield. These findings are expected to provide a new perspective in that straw-returning with biochar achieves high efficiency, ecological, and sustainable development of agriculture." @default.
- W4308981388 created "2022-11-20" @default.
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- W4308981388 date "2023-01-01" @default.
- W4308981388 modified "2023-10-14" @default.
- W4308981388 title "Response of soil nutrients retention and rice growth to biochar in straw returning paddy fields" @default.
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- W4308981388 doi "https://doi.org/10.1016/j.chemosphere.2022.137244" @default.
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