Effects of irrigation methods and salinity on CO2 emissions from farmland soil during growth and fallow periods

Wei, Chenchen; Ren, Shumei; Yang, Peiling; Yu, Wang; He, Xiaoyun; Xu, Ziang; Wei, Rong; Wang, Shuaijie; Chi, Yanbing; Zhang, Meitao

doi:10.1016/j.scitotenv.2020.141639

Cited by 51 publications

(26 citation statements)

References 49 publications

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“…For tomatoes with a high photorespiration rate, increasing atmospheric CO 2 concentration in a certain range can not only provide more sufficient raw materials for photosynthesis but also increase the activity of (RuBP) carboxylase of ribulose 5-diphosphate, which is beneficial to accelerate the binding of RuBP in chloroplasts to CO 2 entering chloroplasts, thus enhancing the ability of photosynthesis to fix CO 2 , formatting 3-phosphoglyceric acid (PGA), and further synthesizing photosynthetic carbohydrate through C3 cycling [63,64]. In this study, there was a positive correlation between soil moisture and soil respiration rate (see Figure 11), which was consistent with that obtained by Wei et al [65] when soil moisture content in maize planting under drip irrigation was lower than the field water holding capacity. This study also found that there was a synergistic change of TOC and MBC in the soil of tomato under MSPF, which was positively correlated with the soil respiration rate (see Figure 11).…”

Section: Correlation Between Soil Microenvironment Soilsupporting

confidence: 91%

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Effects of Micropore Group Spacing and Irrigation Amount on Soil Respiration and Yield of Tomato with Microsprinkler Irrigation under Plastic Film in Greenhouse

et al. 2021

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Microsprinkler irrigation under a plastic film in the greenhouse (MSPF) is a water-saving way which adopts the porous discharge form of a pipe under the plastic film. The effects of different micropore group spacings (L1:30 cm, L2: 50 cm) and irrigation amounts [I1: 0.7 Epan; I2: 1.0 Epan; and I3: 1.2 Epan (Epan is the diameter of 20 cm standard pan evaporation, mm)] of the MSPF on the soil respiration and yield of tomato were studied. A completely randomized trial design was used, and drip irrigation under plastic film (CK1) and microsprinkler irrigation (CK2) were also used as controls. The results showed that under the same irrigation amount, the soil respiration rate, tomato yield, and water use efficiency (WUE) of MSPF in spring and autumn are 8.09% and 6.74%, 19.39% and 4.54%, and 10.03% and 2.32% higher than those of CK1, respectively; they are significantly increased by 31.02% and 20.46%, 49.22% and 38.38%, and 58.05% and 34.66% compared with those of CK2, respectively, indicating that MSPF increased the amount of CO2 emission, but tomato yield and WUE were effectively improved, and a dynamic balance was reached among them. Compared with the 50 cm micropore group spacing, the spring and autumn tomato yields and WUE under the 30 cm micropore group spacing were significantly increased by 16.00% and 13.01% and 20.85% and 14.25%, respectively, and the micropore group spacing had no significant effect on the soil respiration rate in both root and nonroot zones. When the I increased from 0.7 Epan to 1.2 Epan, the soil respiration rate and yield in the root and nonroot zones of the spring and autumn tomatoes increased at first and then decreased, and the WUE showed a decreasing trend. The relationship of soil respiration rate between the nonroot and root zones obeys a logarithmic function, and the soil respiration rate in the nonroot zone has a quadratic curve relationship with the yield of tomato. This study can provide data support for the development of water-saving irrigation and yield increase of facility agricultural tomato and the analysis of the soil carbon cycling mechanism.

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Section: Correlation Between Soil Microenvironment Soilsupporting

confidence: 91%

“…Previous studies have found that there is a significant positive correlation between the soil temperature and soil respiration rate [34,65,67]. However, there was no significant difference in the positive effect of temperature on the soil respiration rate in this study.…”

Section: Correlation Between Soil Microenvironment Soilcontrasting

confidence: 86%

Effects of Micropore Group Spacing and Irrigation Amount on Soil Respiration and Yield of Tomato with Microsprinkler Irrigation under Plastic Film in Greenhouse

et al. 2021

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“…In most cases, surface drainage not only causes an increase in agricultural production, but in many countries, it also leads to a reduction in retention and water loss, and it is ineffective in the event of a flood. The advancement of science and technology and the increasing attention to agriculture have encouraged the wide application of subsurface Sustainability 2021, 13, 9835 2 of 19 drainage technology in agricultural production [6]. However, underground drainage has an adverse effect on surface water quality, and the excessive nutrients cause environmental pollution [7].…”

Section: Introductionmentioning

confidence: 99%

“…In arid areas, controlled drainage has become increasingly popular in the treatment of saline soil due to its advantages, which include lower land space requirements, low pollution, long durability, stability, no weeds, lower labor requirements, less earthwork, easy management, operation, and maintenance, and convenience of mechanized construction [12]. Studies have shown that soil salinization is one of the major causes of the decline of agricultural productivity in many arid and semi-arid regions in the world [13,14]. In most cases, conventional irrigation and crop management measures cannot reduce soil salinity [15], so using subsurface drainage to reduce soil salinization offers a solution.…”

Section: Introductionmentioning

confidence: 99%

Effects of Controlled Drainage on the Content Change and Migration of Moisture, Nutrients, and Salts in Soil and the Yield of Oilseed Sunflower in the Hetao Irrigation District

Dou

Shi

et al. 2021

Sustainability

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Controlled drainage (CD) is an important agricultural measure for maintaining soil moisture and nutrients, controlling groundwater level, and increasing crop yield. In arid regions, CD can be used to improve the water supply in agriculture and reduce environmental pollution. In this study, we investigated the effects of CD, including drainage depths of 40 cm (CWT1) and 70 cm (CWT2) during the plant growth stages, free drainage (FD), and open-ditch drainage (OD), on the migration of water, nutrients, and salts in the soil, the dynamics of the groundwater level, the loss of soil nitrogen, and the growth of oilseed sunflower plants. Compared with FD, CD increased the water and nutrient content in the soil, reduced nitrogen loss, and enhanced the ability of the soil to continuously supply nitrogen to the oilseed sunflower plants, which benefited plant growth at later growth stages and reduced environmental pollution. During the period between irrigation at the budding stage and the harvest stage, the average soil water content in the 0–20 cm soil layer in CWT1 increased by 3.67%, 4.78%, and 0.55%, respectively, compared with that in CWT2, FD, and OD. The soil mineral content in CWT1 was 25.17%, 35.05%, and 17.78% higher than that in CWT2, FD, and OD, respectively, indicating that higher soil salinity occurred at the later stage of plant growth in CWT1, which actually had little effect on the plants due to their enhanced salt tolerance and increased need for water and nutrients at that stage. In addition, CD delayed the decline in groundwater level, which allowed the plants to use groundwater at later growth stages, and as a result, the yield and water-use efficiency were improved. CWT1 significantly increased oilseed sunflower yield by 4.52–11.14% and increased water-use efficiency by 1.16–10.8%. Moreover, CWT1 also increased the survival rate of the oilseed sunflower plants by 2.62–2.92%, and the plants demonstrated good growth. Therefore, under CD conditions, plants used soil water and nitrogen more efficiently and, as a result, their productivity was increased, and the water quality was improved.

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“…In arid areas, controlled drainage (CD) has become increasingly popular in the treatment of saline soil due to its advantages, which include lower land space requirements, low pollution, long durability, stability, no weeds, lower labor requirements, less earthworks, easy management, operation, and maintenance, and mechanized construction convenience [11] . Studies have shown that soil salinization is one of the major causes of the decline of agricultural productivity in many arid and semiarid regions in the worldc [12,13]. In most cases, conventional irrigation and crop management measures cannot reduce soil salinity [14], and so using concealed drainage to reduce soil salinization offers a solution.…”

Section: Introductionmentioning

confidence: 99%

Effect of Controlled Drainage on the Migration of Water, Nutrients, and Salts in Soil and the Yield of Oilseed Sunflower in Hetao Irrigation District

Dou¹,

H²,

R³

et al. 2021

Preprint

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Controlled drainage (CD) is an important agricultural measure for maintaining soil moisture and nutrients, controlling groundwater level, and increasing crop yield. In arid regions, CD can be used to improve the water supply in agriculture and reduce environmental pollution. In this study, we investigated the effect of CD, including a drainage depth of 40 cm (CWT1) and 70 cm (CWT2) during the plant growth period, free drainage (FD), and open ditch drainage (OD) on the migration of water, nutrients, and salts in the soil; the dynamics of groundwater level; the loss of soil nitrogen; and the growth of oilseed sunflower plants. Compared with FD, CD increased the water and nutrient content in the soil, reduced nitrogen loss, and enhanced the ability of the soil to continuously supply nitrogen to the oilseed sunflower plants, which benefited plant growth at later growth stages and reduced environmental pollution. During the period between irrigation at the budding stage and harvest stage, the average soil water content in the 0–20 cm soil layer in CWT1 increased by 3.67%, 4.78%, and 0.55%, respectively, compared with that in CWT2, FD, and OD. The soil mineral content in CWT1 was 25.17%, 35.05%, and 17.78% higher than that in CWT2, FD, and OD, respectively, indicating that higher soil salinity occurred at the later stage of plant growth in CWT1, which actually had little effect on the plants due to their enhanced salt tolerance and increased need for water and nutrients at that stage. In addition, CD delayed the decline in groundwater level, which allowed the plants to use groundwater at later growth stages, and as a result the yield and water use efficiency were improved. CWT1 significantly increased oilseed sunflower yield by 4.52–11.14% and increased water use efficiency by 1.16–10.8%. Moreover, CWT1 also increased the survival rate of the oilseed sunflower plants by 2.62–2.92%, and the plants demonstrated good growth. Therefore, under CD conditions, plants used soil water and nitrogen more efficiently and, as a result, their productivity was increased, and the water quality was improved.

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Effects of irrigation methods and salinity on CO2 emissions from farmland soil during growth and fallow periods

Cited by 51 publications

References 49 publications

Effects of Micropore Group Spacing and Irrigation Amount on Soil Respiration and Yield of Tomato with Microsprinkler Irrigation under Plastic Film in Greenhouse

Effects of Micropore Group Spacing and Irrigation Amount on Soil Respiration and Yield of Tomato with Microsprinkler Irrigation under Plastic Film in Greenhouse

Effects of Controlled Drainage on the Content Change and Migration of Moisture, Nutrients, and Salts in Soil and the Yield of Oilseed Sunflower in the Hetao Irrigation District

Effect of Controlled Drainage on the Migration of Water, Nutrients, and Salts in Soil and the Yield of Oilseed Sunflower in Hetao Irrigation District

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