Effect of rainfall on the seasonal variation of soil respiration in Hulunber Meadow Steppe

Xu, 王旭 Wang; Yuchun, 闫玉春 Yan; Ruirui, 闫瑞瑞 Yan; Guixia, 杨桂霞 Yang; Xiaoping, 辛晓平 Xin

doi:10.5846/stxb201304080631

Cited by 5 publications

(4 citation statements)

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“…This study shows that the greater the amount of crop irrigation under the same nitrogen level, the faster the leaching rate, and the higher the DIC content in the leaching solution. This is because vertical carbon loss will accelerate with increased precipitation [24]. Through this experiment, it was found that the amount of DIC leaching by agricultural irrigation in arid areas was very considerable, significantly higher than that of DIC leaching, which was consistent with the view of Schulze [25], that the increase in water content in soil increased the concentration of DIC, and DIC was difficult to maintain the easier the leaching in the soil.…”

Section: Discussionsupporting

confidence: 78%

Effects of Irrigation and Nitrogen Fertilizer on Soil Carbon Leaching in Cotton Fields in Arid Areas

et al. 2023

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In order to formulate a reasonable water input model for cotton fields in southern Xinjiang for scientific and rational fertilization, to reduce soil carbon leaching, and to improve soil carbon sequestration capacity, an undisturbed soil column leaching test was used to simulate the current field management method in the study area. Two methods, drip irrigation and flood irrigation, were set up, and three irrigation and three nitrogen fertilizer levels were used to carry out the undisturbed soil column leaching test. The results showed that the amount and mode of water and nitrogen input affected the distribution and leaching loss of organic carbon and inorganic carbon in the soil. When the nitrogen application rate increased from 270 kg·hm−2 to 450 kg·hm−2, the leaching loss of soluble organic carbon and soluble inorganic carbon increased significantly. When the water input increased from 6000 m3·hm−2 to 9000 m3·hm−2, the leaching loss of DOC and DIC increased significantly. The carbon leaching loss under drip irrigation was higher than that under flood irrigation. The leaching rates of DOC and DIC were fastest under the conditions of high water (9000 m3·hm−2) and high fertilizer (450 kg·hm−2). This shows that water and nitrogen input and irrigation methods are important factors affecting soil carbon leaching. In the case of excessive water input, long-term high-frequency irrigation is the main factor affecting carbon leaching.

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Section: Discussionsupporting

confidence: 78%

Effects of Irrigation and Nitrogen Fertilizer on Soil Carbon Leaching in Cotton Fields in Arid Areas

et al. 2023

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“…Ensiling is an important method of animal feed and it offers an alternative means to preserve forage grass (McDonald et al ; Muck ). On the other hand, rainfall is concentrated between May and September (Zhou et al ; Wang et al ), the principal harvest season of Chinese leymus. The weather is unreliable for drying, and ensiling is preferable for conserving this forage resource during the rainy season.…”

Section: Introductionmentioning

confidence: 99%

Fermentation and microbial population dynamics during the ensiling of native grass and subsequent exposure to air

Zhang

Nishino

et al. 2015

Animal Science Journal

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To study the microbial population and fermentation dynamics of large needlegrass (LN) and Chinese leymus (CL) during ensiling and subsequent exposure to air, silages were sampled and analyzed using culture-based techniques and denaturing gradient gel electrophoresis (DGGE). A total of 112 lactic acid bacteria (LAB) strains were isolated and identified using the 16S rRNA sequencing method. Lactic acid was not detected in the first 20 days in LN silage and the pH decreased to 6.13 after 45 days of ensiling. The temperature of the LN silage increased after approximately 30 h of air exposure and the CL silage showed a slight temperature variation. Enterococcus spp. were mainly present in LN silage. The proportion of Lactobacillus brevis in CL silage increased after exposure to air. LN silage with a higher proportion of Enterococcus spp. and propionic acid concentration did not show higher fermentation quality or aerobic stability than CL silage, which had a higher concentration of acetic acid, butyric acid and increased proportion of L. brevis after exposure to air.

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“…water disturbance. The maximum temperature appears in July (Wang et al, 2014b). Increasing temperatures may alter traditional wetland phosphorus biogeochemistry (Erwin, 2009) by decreasing oxygen solubility (Adlec and Reddy, 2001), increasing organic phosphorus mineralization, and accelerating adsorption and precipitation rates of phosphorus (Reddy, 2004).…”

Section: Discussionmentioning

confidence: 99%

Dynamics of Phosphorus Content in the Water‐Sediment Interface of Wetlands in a Mid‐Temperature Steppe

et al. 2018

Water Environment Research

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In order to reveal dynamics changes in phosphorus release from the sediments of wetlands in a mid-temperature steppe without external phosphorus input, the relationship between phosphorus content in the overlying water, sediment, and interstitial water was studied using the variables control method. The results showed that, during the incubation period, the content of total phosphorus in the overlying water and the content of total phosphorus in interstitial water both presented in the order of August > September > July. Furthermore, the correlation relationships between phosphorus content in the overlying water, total phosphorus in the interstitial water, and the ratios of sediment Olsen-P to total phosphorus in the interstitial water, indicated that Olsen-P might be a kind of release form of phosphorus - from the sediment to the overlying water of the wetlands in Hulunbeier steppe, without external phosphorus input.

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Effect of rainfall on the seasonal variation of soil respiration in Hulunber Meadow Steppe

Cited by 5 publications

References 0 publications

Effects of Irrigation and Nitrogen Fertilizer on Soil Carbon Leaching in Cotton Fields in Arid Areas

Effects of Irrigation and Nitrogen Fertilizer on Soil Carbon Leaching in Cotton Fields in Arid Areas

Fermentation and microbial population dynamics during the ensiling of native grass and subsequent exposure to air

Dynamics of Phosphorus Content in the Water‐Sediment Interface of Wetlands in a Mid‐Temperature Steppe

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