Optimal coupling combinations between dripper discharge and irrigation interval of maize for seed production under plastic film-mulched drip irrigation in an arid region

Ma, Shimeng; Tong, Ling; Kang, Shaozhong; Wang, Sufen; Wu, Xuanyi; Cheng, Xiaona; Li, Qiangqiang

doi:10.1007/s00271-021-00739-x

Cited by 11 publications

(5 citation statements)

References 32 publications

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“…Facing rising population and food demand, finding synergies to ensure seed and food production rather than focusing only on the grain crop production is a new strategy to ensure food security. Seed maize production could be increased by optimizing irrigation and N fertilization and agricultural strategies (Ma et al., 2021; Shi et al., 2020). However, these results were only proved in field experiments and did not evaluate seed production under climate change.…”

Section: Discussionmentioning

confidence: 99%

Adaptation Strategy Can Ensure Seed and Food Production With Improving Water and Nitrogen Use Efficiency Under Climate Change

et al. 2023

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Adaptation strategies can reduce the negative impacts of climate change on food security. As an important part of food security, more attention should be paid to seed security, as it determines the crop planting area and ultimately affects food production, especially in major seed production locations, such as the Hexi Corridor in China. This region is an important production base of grain (including field maize and wheat) and maize seed, but the shortage of water resources and low use efficiency of water and nitrogen (N) seriously constrain the sustainable development of agriculture. Formulating an adaptation strategy to balance the seed and food production and resource use efficiency is an important way to maintain regional as well as national food production. We established an optimization‐simulation framework, which consists of a novel crop production function and a grid‐based crop model, APSIM. This framework was used to optimize agricultural management and evaluate its performance considering the spatio‐temporal variability of climate and soil properties, actual crop water consumption and N uptake during each growth stage, and interactive sensitivity coefficients of water and N at different growth stages under climate change. We show that the proposed adaptation strategy could save 0.31 km³ of irrigation water and 22 thousand tonnes of N fertilizer, and increase seed and food production by 33 thousand tonnes, compared with traditional practices. Significant increases in irrigation water productivity and N use efficiency can be expected by using the adaptation supporting the sustainable development of agriculture.

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Section: Discussionmentioning

confidence: 99%

Adaptation Strategy Can Ensure Seed and Food Production With Improving Water and Nitrogen Use Efficiency Under Climate Change

et al. 2023

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“…Soil–groundwater interactions were enhanced by the irrigation flux and area. , According to the environmentally relevant conditions, the sensitivity analysis about the two ranges of irrigation areas (a large area with 5–20 m and small areas with 5–10 and 15–20 m) and three irrigation fluxes (1.6, 3.2, and 6.4 L/h) were conducted to investigate the impact of irrigation on MP migration. , Besides, D L is an important parameter used to characterize the dispersion degree and varying velocity of MPs affected by the heterogeneity and flow field within the subsurface environment. , Therefore, the sensitivity analysis of MP migration to D L (0, 2.775 × 10 –21 , 5.55 × 10 –20 , and 2.775 × 10 –17 m 2 /s) was examined. Moreover, the properties of MPs (size and density) play crucial roles in determining their amount in the subsurface environment due to their presentation as nondissolvable particulate pollutants in the environment. − Considering the practical environmental conditions, the sensitivity analysis of three distinct types of MPs involving PE (polyethylene) with a density of 0.89 g/cm 3 , PP (polypropylene) with a density of 0.98 g/cm 3 , and PVC (polyvinyl chloride) with a density of 1.58 g/cm 3 and the sensitivity analysis of MP size (5, 50, and 100 μm) were comprehensively conducted to clarify the impacts of MP properties on their fates. ,, Furthermore, the heterogeneity of subsurface environments is unavoidable, which further affects the behavior of seepage flow and the migration of contaminants. , Therefore, an elliptical structure (heterogeneous zone) with an area of 4.71 m 2 was placed in the middle of the saturated aquifer, and three scenarios were set with the K values of 0.007128, 7.128, and 142.46 m/day in the heterogeneous zone to investigate the migration behaviors of MPs (Table S2).…”

Section: Methodsmentioning

confidence: 99%

“…20,21 According to the environmentally relevant conditions, the sensitivity analysis about the two ranges of irrigation areas (a large area with 5−20 m and small areas with 5−10 and 15−20 m) and three irrigation fluxes (1.6, 3.2, and 6.4 L/h) were conducted to investigate the impact of irrigation on MP migration. 67,71 Besides, D L is an important parameter used to characterize the dispersion degree and varying velocity of MPs affected by the heterogeneity and flow field within the subsurface environment. 28,29 Therefore, the sensitivity analysis of MP migration to D L (0, 2.775 × 10 −21 , 5.55 × 10 −20 , and 2.775 × 10 −17 m 2 /s) was examined.…”

Section: Developing Predictive Models For Practical Applications 231 ...mentioning

confidence: 99%

Modeling of Microplastics Migration in Soil and Groundwater: Insights into Dispersion and Particle Property Effects

Wei,

Chen,

Cao

et al. 2024

Environ. Sci. Technol.

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Migration of microplastics (MPs) in soil−groundwater systems plays a pivotal role in determining its concentration in aquifers and future threats to the terrestrial environment, including human health. However, existing models employing an advection−dispersion equation are insufficient to incorporate the holistic mechanism of MP migration. Therefore, to bridge the gap associated with MP migration in soil−groundwater systems, a dispersion−drag force coupled model incorporating a drag force on MPs along with dispersion is developed and validated through existing laboratory and field-scale experiments. The inclusion of the MP dispersion notably increased the global maximum particle velocity (v maxp ) of MPs, resulting in a higher concentration of MPs in the aquifer, which is also established by sensitivity analysis of MP dispersion. Additionally, increasing irrigation flux and irrigation areas significantly accelerates MP migration downward from soil to deep saturated aquifers. Intriguingly, v maxp of MPs exhibited a nonlinear relationship with MPs' sizes smaller than 20 μm reaching the highest value (=1.64 × 10 −5 m/s) at a particle size of 8 μm, while a decreasing trend was identified for particle sizes ranging from 20 to 100 μm because of the hindered effect by porous media and the weaker effect of the drag force. Moreover, distinct behaviors were observed among different plastic types, with poly(vinyl chloride), characterized by the highest density, displaying the lowest v maxp and minimal flux entering groundwater. Furthermore, the presence of a heterogeneous structure with lower hydraulic conductivity facilitated MP dispersion and promoted their migration in saturated aquifers. The findings shed light on effective strategies to mitigate the impact of MPs in aquifers, contributing valuable insights to the broader scientific fraternity.

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“…The growth of maize requires more fertilizer and water. Many factors, such as the drip tape layout, drip flow rate, and irrigation amount and interval, can affect the soil water distribution [17,18]. In a drip irrigation system, the wetting pattern and components are crucial for optimum design and operation.…”

Section: Effects Of Various Drip Tape Layouts and Drip Emitter Flow R...mentioning

confidence: 99%

Effects of Drip Tape Layout and Flow Rate on Water and Nitrogen Distributions within the Root Zone and Summer Maize Yield in Sandy Tidal Soil

Sun,

Zhang,

et al. 2023

Agronomy

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Drip tape layout and flow rate are crucial variables that impact the effects of drip fertigation. To investigate the influence of drip tape layout and flow rate on the soil water and nitrogen transport in summer maize in sandy tidal soil, field experiments were conducted for two years. Two drip tape layouts were set: one tape serving for two crop rows (N) and one tape serving for each crop row (E), with two levels of drip flow rate, i.e., high (2 L/h; H) and low (1.3 L/h; L). The results show that under the same drip tape layout, the lower the drip emitter flow rate, the more upright the shape of wetted soil volume. The maximum vertical and horizontal water transport distance under NL treatment was higher than that under NH, EH, and EL treatments. After surface drip fertigation, nitrate nitrogen accumulated near and at the edge of the wetted soil volume. In 2020, under NL treatment, nitrate nitrogen transported to a 55 cm soil layer, which was 22.22%, 71.42%, and 57.14% deeper than that under NH, EH, and EL treatments, respectively. In 2021, nitrate nitrogen could transport to a 60 cm soil layer in both NL and NH treatments. The maximum concentration of ammonium nitrogen was nearby the emitter. Under NL treatment, ammonium nitrogen was transported to 48 and 60 cm soil layers below the emitter in 2020 and 2021, respectively, which was deeper than that observed under NH, EH, and EL treatments. The soil inorganic nitrogen residue of the NL was lower than that of the NH, EH, and EL treatments. Compared with NH, EH, and EL treatments, the two-year maize yield under NL treatment increased by 11.09%, 13.47%, and 8.66% on average, respectively. NL treatment exhibited the highest water use efficiency and nitrogen fertilizer productivity. Therefore, NL treatment (one drip tape serving for two rows with 1.3 L/h flow rate) could promote the absorption of water and nutrients, reduce inorganic nitrogen residue, and to obtain high maize yield in sandy tidal soil.

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Optimal coupling combinations between dripper discharge and irrigation interval of maize for seed production under plastic film-mulched drip irrigation in an arid region

Cited by 11 publications

References 32 publications

Adaptation Strategy Can Ensure Seed and Food Production With Improving Water and Nitrogen Use Efficiency Under Climate Change

Adaptation Strategy Can Ensure Seed and Food Production With Improving Water and Nitrogen Use Efficiency Under Climate Change

Modeling of Microplastics Migration in Soil and Groundwater: Insights into Dispersion and Particle Property Effects

Effects of Drip Tape Layout and Flow Rate on Water and Nitrogen Distributions within the Root Zone and Summer Maize Yield in Sandy Tidal Soil

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