Co-application of nitrogen and straw-decomposing microbial inoculant enhanced wheat straw decomposition and rice yield in a paddy soil

Few studies have focused on the combined application of digestate and straw and its feasibility in rice production. Therefore, we conducted a two-year field experiment, including six treatments: without nutrients and straw (Control), digestate (D), digestate + fertilizer (DF), digestate + straw (DS), digestate + fertilizer + straw (DFS) and conventional fertilizer + straw (CS), to clarify the responses of rice growth and paddy soil nutrients to different straw and fertilizer combinations. Our results showed that digestate and straw combined application (i.e., treatment DFS) increased rice yield by 2.71 t ha−1 compared with the Control, and digestate combined with straw addition could distribute more nitrogen (N) to rice grains. Our results also showed that the straw decomposition rate at 0 cm depth under DS was 5% to 102% higher than that under CS. Activities of catalase, urease, sucrase and phosphatase at maturity under DS were all higher than that under both Control and CS. In addition, soil organic matter (SOM) and total nitrogen (TN) under DS and DFS were 20~26% and 11~12% higher than that under B and DF respectively, suggesting straw addition could benefit paddy soil quality. Moreover, coupling straw and digestate would contribute to decrease the N content in soil surface water. Overall, our results demonstrated that digestate and straw combined application could maintain rice production and have potential positive paddy environmental effects.

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Winter Wheat Straw Decomposition under Different Nitrogen Fertilizers

Agriculture ◽

10.3390/agriculture11020083 ◽

2021 ◽

Vol 11 (2) ◽

pp. 83

Author(s):

Gabriela Mühlbachová ◽

Pavel Růžek ◽

Helena Kusá ◽

Radek Vavera ◽

Martin Káš

Keyword(s):

Winter Wheat ◽

Wheat Straw ◽

Soil Surface ◽

Weather Conditions ◽

Mineral Nitrogen ◽

Nitrogen Fertilizers ◽

Pig Slurry ◽

Straw Decomposition ◽

Rainy Weather ◽

N Fertilisers

The climate changes and increased drought frequency still more frequent in recent periods bring challenges to management with wheat straw remaining in the field after harvest and to its decomposition. The field experiment carried out in 2017–2019 in the Czech Republic aimed to evaluate winter wheat straw decomposition under different organic and mineral nitrogen fertilizing (urea, pig slurry and digestate with and without inhibitors of nitrification (IN)). Treatment Straw 1 with fertilizers was incorporated in soil each year the first day of experiment. The Straw 2 was placed on soil surface at the same day as Straw 1 and incorporated together with fertilizers after 3 weeks. The Straw 1 decomposition in N treatments varied between 25.8–40.1% and in controls between 21.5–33.1% in 2017–2019. The Straw 2 decomposition varied between 26.3–51.3% in N treatments and in controls between 22.4–40.6%. Higher straw decomposition in 2019 was related to more rainy weather. The drought observed mainly in 2018 led to the decrease of straw decomposition and to the highest contents of residual mineral nitrogen in soils. The limited efficiency of N fertilisers on straw decomposition under drought showed a necessity of revision of current strategy of N treatments and reduction of N doses adequately according the actual weather conditions.

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Effect of biofertilizer and wheat straw biochar application on nitrous oxide emission and ammonia volatilization from paddy soil

Environmental Pollution ◽

10.1016/j.envpol.2021.116640 ◽

2021 ◽

Vol 275 ◽

pp. 116640

Author(s):

Haijun Sun ◽

Yu Zhang ◽

Yiting Yang ◽

Yudong Chen ◽

Paramsothy Jeyakumar ◽

...

Keyword(s):

Nitrous Oxide ◽

Wheat Straw ◽

Paddy Soil ◽

Ammonia Volatilization ◽

Nitrous Oxide Emission

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Carbon Dioxide Emissions and Transformation of Soil Carbon and Nitrogen during Wheat Straw Decomposition

Soil Science Society of America Journal ◽

10.2136/sssaj1998.03615995006200040026x ◽

1998 ◽

Vol 62 (4) ◽

pp. 1035-1041 ◽

Cited By ~ 51

Author(s):

D. Curtin ◽

F. Selles ◽

H. Wang ◽

V. O. Biederbeck ◽

C. A. Campbell

Keyword(s):

Carbon Dioxide ◽

Soil Carbon ◽

Wheat Straw ◽

Carbon Dioxide Emissions ◽

Straw Decomposition ◽

Carbon And Nitrogen ◽

Soil Carbon And Nitrogen

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Wheat Straw Decomposition Patterns and Control Factors Under Nitrogen Fertilization

Journal of soil science and plant nutrition ◽

10.1007/s42729-021-00592-z ◽

2021 ◽

Author(s):

Jin Liu ◽

Yangquanwei Zhong ◽

Xiaoyu Jia ◽

Weiming Yan ◽

Jia Cao ◽

...

Keyword(s):

Wheat Straw ◽

Nitrogen Fertilization ◽

Straw Decomposition ◽

Control Factors ◽

And Control

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Effects of Pretreatment Methods of Wheat Straw on Adsorption of Cd(II) from Waterlogged Paddy Soil

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph16020205 ◽

2019 ◽

Vol 16 (2) ◽

pp. 205 ◽

Cited By ~ 16

Author(s):

Mengjie Wu ◽

Hongyu Liu ◽

Chunping Yang

Keyword(s):

Wheat Straw ◽

Paddy Soil ◽

Morphological Changes ◽

Ethanol Solution ◽

Acid Oxidation ◽

Organic Carbon Content ◽

Microwave Assisted ◽

Dynamic Variations ◽

Behavior Study ◽

Effective Removal

Two types of pretreatment categories, namely microwave-assisted alkalization and microwave-assisted acid oxidation, were used to synthesize novel wheat straw adsorbents for the effective removal of Cd(II) in simulated waterlogged paddy soil. A systematic adsorption behavior study, including adsorption kinetics and adsorption isotherms was conducted. Results showed that wheat straw pretreated by microwave-assisted soaking of NaOH and ethanol solution obtained the highest Cd(II) removal efficiency of 96.4% at a reaction temperature of 25 ℃, pH of 7.0, initial Cd(II) concentration of 50 mg/L, and adsorbent/adsorbate ratio of 10 g/L. Sequential extraction experiment was carried out to analyze the changes of different of Cd(II) in soil, the aim of which was to study the mobility of Cd(II) and then evaluate the toxicity that Cd(II) might bring to plants. A 60-day incubation was performed to investigate the dynamic variations of soil pH and dissolved organic carbon content over incubation time. Characterization analyses revealed the morphological changes of wheat straw adsorbents, which suggested that those pretreatment methods were of significance. This study provided an environmentally friendly way to reuse agricultural wastes and remedy Cd(II) contaminated soil.

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