Assessing chemical soil tests for predicting nitrogen mineralization in paddy soils of the Dongting Lake region in China

Li, Wenjun; Peng, Bangzhu; Zhao, Di; Yang, Jun

doi:10.1007/s11368-016-1443-0

Cited by 3 publications

(2 citation statements)

References 39 publications

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“…However, the reverse was true in the case of the higher proportion (more than 45%) of organic fertilizer treatment, such as GM 6 in this study. The delaying effect of the combined fertilizer with higher proportion of organic nitrogen affected the normal color change of leaves at late growth stage, and even led to stay‐green and yield reduction, which is consistent with the previous studies in conventional rice cultivation (Li et al., 2014, 2015; Lv et al., 2001; Qiu et al., 2005; Ren et al., 2005; Tang et al., 2019; Tian et al., 2012; Zhang et al., 2009). Further analysis of 13 CO 2 pulse labeling test confirmed that different configurations of organic and inorganic fertilizers used in the main crop season had a carryover effect on its ratooning rice (Table 6, Zang et al., 2019).…”

Section: Discussionsupporting

confidence: 91%

Optimally combined application of organic and chemical fertilizers increases grain yield and improves rhizosphere microecological properties in rice ratooning

et al. 2023

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Field tests were conducted at experimental station of Chongluo, Nanping city, Fujian province, China in 2018–2019 to explore the action and physiological mechanism of organic nitrogen in rice ratooning under the configurations with different proportions of organic and inorganic nitrogen. The results showed that sole chemical fertilizer (CF) led to a significant decrease in soil nutrient availability, especially at late growth stage, and reduced grain yield of the main and ratooning crops compared with the optimal fertilizer configuration (GM2) in 30% organic nitrogen with 70% chemical nitrogen fertilizer in the premise of total application rate at 225 kg N/ha. Further studies have revealed that GM2 relative to CF treatment promoted to produce more productive panicles of the main crop and had carryover effect on the regeneration rate of ratooning rice due to national C13‐assimilates partitioning in rice–rhizosphere systems, which resulted in increased soil microbial diversity and soil fertility, thereby enhanced yields of the main and ratooning rice crops. These findings help to better understand the action and mechanism of the proper combined application of organic and inorganic nitrogen fertilizer via improving remobilization of 13C assimilates in rice–rhizosphere system, and ultimately increasing grain yield in rice ratooning.

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Section: Discussionsupporting

confidence: 91%

Optimally combined application of organic and chemical fertilizers increases grain yield and improves rhizosphere microecological properties in rice ratooning

et al. 2023

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“…The values of the SON mineralization rate constant (k0) ranged from 0.1026 to 0.1207, with little overall variation at 30% and 60% WHC, but was different at 90% WHC. Further, k0 was mainly affected by the physical and chemical properties of the soil when external conditions changed little (Li et al, 2019). In this study, RM and RC soils were tidal paddy soil developed from lacustrine deposits such that k0 of RM and RC had no difference at 30% and 60% WHC, while large k0 existed at 90% WHC.…”

Section: Effects Of Rc On Soil Organic N Mineralizationmentioning

confidence: 78%

Co-culture of rice and crayfish increases the global warming potential-An evidence from soil culture with different water content

Liu,

Zhang,

Hou

et al. 2023

Preprint

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Rice–crayfish co-culture (RC) has been recognized as a comprehensive ecotype mode. Controversial opinions exist regarding the increase or decrease in global warming potential (GWP) by RC compared with rice monoculture (RM) because N2O and CH4 emission are affected by complex external factors including fertilizer, water management, and temperature (e.g., as in the RC system). However, whether soil from the RC field, except for external conditions, has different characteristics (i.e., organic N and carbon mineralization) that affect N2O and CH4 emission needs clarification. This study aimed to investigate the characteristics of soil organic carbon (SOC) and soil organic nitrogen (SON) mineralization and greenhouse gas emission in soils from RC (RC8 and RC15, indicating 8 and 15 years, respectively) and RM fields using the indoor biological culture method with different water-holding capacity (WHC) levels with a soil moisture content of 30%, 60%, and 90%s. Moreover, the dynamic model of SOC/SON mineralization was fitted to provide data support for fertilization and low-carbon management. RC soil had a higher rate of SOC/SON mineralization that mainly occurred in the first 7 days, and the mineralization rate increased first and then decreased with increasing WHC. The SOC mineralization rate constant (k) showed the trend of RC15 > RC8 > RM at 60% WHC, while the soil from these three fields had similar k values at 30% and 90% WHCs. Further, the half-revolution period of SOC (T1/2) was between 3.395 and 3.665, unlike the k value. The SON mineralization rate constant (k0) showed significant differences, with RC8 > RC15 > RM at 90% WHC, while no significant difference was found at 30% and 60% WHC and the k0 value varied from 0.103 to 0.120 under different WHC levels. RC8 and RC15 soils showed significantly higher soil net ammonification rate (0.5–3.04 g kg− 1 d− 1), net nitrification rate (0.04–0.09 g kg− 1 d− 1), and SON net mineralization rate (0.55–3.13 g kg− 1 d− 1) by more than 67%, 33%, and 65% compared with RM soil. At 30%, 60%, and 90% WHC, cumulative N2O emissions increased by 19–34%, 12–33%, and 17–32% in RC soil than in RM soil, respectively, and RC15 soil showed the highest emission. The cumulative CH4 emission significantly decreased by 23.1% and 11.5% at 30% WHC in RC8 and RC15 soils, respectively, than that of in RM soil. RC soil showed higher soil mineral N content and 31–59% higher GWP compared with those in RM soil, indicating that RC had higher mineral N support, while also having higher carbon emission risk. Therefore, N fertilizer can be reduced to a certain extent for long-time RC fields, and other effective low-carbon measures (e.g., enhanced-efficiency fertilizer, deep fertilization, and straw management) can be adopted to reduce GWP.

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Efficiency-enhancing methods for predicting nitrogen mineralization characteristics in paddy soils using soil properties and rapid soil extraction

LIU,

CHEN,

LIU

et al. 2024

Pedosphere

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Assessing chemical soil tests for predicting nitrogen mineralization in paddy soils of the Dongting Lake region in China

Cited by 3 publications

References 39 publications

Optimally combined application of organic and chemical fertilizers increases grain yield and improves rhizosphere microecological properties in rice ratooning

Optimally combined application of organic and chemical fertilizers increases grain yield and improves rhizosphere microecological properties in rice ratooning

Co-culture of rice and crayfish increases the global warming potential-An evidence from soil culture with different water content

Efficiency-enhancing methods for predicting nitrogen mineralization characteristics in paddy soils using soil properties and rapid soil extraction

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