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• W3207039596 abstract "Abstract Organic fertilizers are widely used in agriculture production and change the soil carbon (C) and nitrogen (N) contents, thus improving crop production. The increased amount of soil C and N exhibit a greater potential to improve the leaf physiological activity, yields and grain quality of rice by improving soil fertility indices. To understand the relationship between soil C and N contents with leaf physiological activity and grain quality; organic fertilizers (i.e., cattle manure (CM) and poultry manure (PM)) coupled with chemical fertilizer (CF) was applied at the different proportion. The recommended rate of N 150 (kg ha −1 ) was provided from manure and CF using six treatments, i.e., T 1 — CF 0 ; T 2 —100% CF; T 3 —60% CM + 40% CF; T 4 —30% CM + 70%CF; T 5 —60% PM + 40% CF, and T 6 —30% PM + 70% CF. Results showed that soil organic C (SOC), total N (TN), leaf net photosynthetic rate ( Pn ), SPAD values, grain yield and grain quality attributes were significantly increased with combined organic and inorganic fertilizer application. Averaged over the years, T 6 treatment significantly improved SOC, TN, Pn , starch content (SC), amylose content (AC), and grain yield by 16%, 12%, 9%, 7%, 12%, and 24%, respectively, compared to CF-only. However, no significant differences among T 4 and T 6 were observed for studied parameters. In addition, the linear regression exhibited that SOC (R 2 = 0.70** & R 2 =0.50*) and TN (R 2 = 0.62* & R 2 =0.58*) were positively correlated with grain SC and AC, respectively. Likewise, Pn (R 2 = 0.51* & R 2 =0.62*) were also positively associated with SC and AC, respectively. The correlation analysis showed that improving SOC and TN played a key role in enhancing leaf physiological activity and grain nutritional quality. Thus, the combination of organic and inorganic fertilizers at a 30:70 ratio is a promising option for the improvement of soil fertility and grain yield of rice as well as grain nutritional traits." @default.
• W3207039596 created "2021-10-25" @default.
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• W3207039596 date "2021-10-12" @default.
• W3207039596 modified "2023-10-14" @default.
• W3207039596 title "Soil carbon and nitrogen regulation using organic and inorganic fertilizers for leaf physiological activity, grain yield and nutritional quality improvements in rice" @default.
• W3207039596 doi "https://doi.org/10.21203/rs.3.rs-965000/v1" @default.
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