Soil C and N and specific bacterial functions affect greenhouse gas emissions in dryland rice under water and fertilizer coupling management DOI Creative Commons
Hao Tan,

Xiaogang An,

Yunfei Tuo

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

Abstract Background Dryland rice has obvious advantages in saving water and fertilizer improving agricultural productivity. However, irrational application of irrigation by farmers is prone to cause a large amount greenhouse gas (GHG) emissions. It great environmental significance explore the emissions dryland under water-fertilizer coupling regimes. Methods In this study, we set up three levels W1 (200 m3·hm-2), W2 (300 W3 (400 four F1 (400·kg-hm-2), F2 (600·kg-hm-2), F3 (800·kg-hm-2), F4 (1000 kg·hm-2) with total twelve treatments completely orthogonal combination as well non-irrigated non-fertilized CK control farmland. The cumulative emissions, global warming potential (GWP), intensity (GHGI) growth period different fertilization were monitored, differences soil physicochemical properties bacterial structure function analyzed, effects representative C N specific functions bacteria on average GHG through structural equation model revealed. Results data showed that increase increased content yield rice. CO2 also 62.40% compared CK, but CH4 N2O significantly decreased 98.20% 42.67%, respectively. was worth noting GWP W3F4 treatment had maximum value 22085.64 kg CO2/ha, GHGI lower. relative abundance Acidobacteriota low. it importance for treatments. Although functional Chemoheterotrophy aerobic_chemoheterotrophy more than 30%, nitrate_ reduction, predatory_or_exoparasitic, chitinolysis less 3.33% which directly affected Moreover, indirectly functions. Conclusions This study can provide reference basis response regimes, practical guidance attenuating farmers' production.

Language: Английский

Soil C and N and specific bacterial functions affect greenhouse gas emissions in dryland rice under water and fertilizer coupling management DOI Creative Commons
Hao Tan,

Xiaogang An,

Yunfei Tuo

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 26, 2024

Abstract Background Dryland rice has obvious advantages in saving water and fertilizer improving agricultural productivity. However, irrational application of irrigation by farmers is prone to cause a large amount greenhouse gas (GHG) emissions. It great environmental significance explore the emissions dryland under water-fertilizer coupling regimes. Methods In this study, we set up three levels W1 (200 m3·hm-2), W2 (300 W3 (400 four F1 (400·kg-hm-2), F2 (600·kg-hm-2), F3 (800·kg-hm-2), F4 (1000 kg·hm-2) with total twelve treatments completely orthogonal combination as well non-irrigated non-fertilized CK control farmland. The cumulative emissions, global warming potential (GWP), intensity (GHGI) growth period different fertilization were monitored, differences soil physicochemical properties bacterial structure function analyzed, effects representative C N specific functions bacteria on average GHG through structural equation model revealed. Results data showed that increase increased content yield rice. CO2 also 62.40% compared CK, but CH4 N2O significantly decreased 98.20% 42.67%, respectively. was worth noting GWP W3F4 treatment had maximum value 22085.64 kg CO2/ha, GHGI lower. relative abundance Acidobacteriota low. it importance for treatments. Although functional Chemoheterotrophy aerobic_chemoheterotrophy more than 30%, nitrate_ reduction, predatory_or_exoparasitic, chitinolysis less 3.33% which directly affected Moreover, indirectly functions. Conclusions This study can provide reference basis response regimes, practical guidance attenuating farmers' production.

Language: Английский

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