Winter and Season-Only Irrigation with Late Summer Irrigation Termination Influences Alfalfa Dry Matter Yield and Applied Water Use Efficiency

Agriculture, Journal Year: 2025, Volume and Issue: 15(2), P. 146 - 146

Published: Jan. 10, 2025

Increasing water scarcity for agricultural irrigation demands options to maximize yield with available water. Alfalfa (Medicago sativa) is a valuable crop in arid and semiarid regions considered major user of Consequently, an area established alfalfa was center-pivot-irrigated over two years according one four regimes, each three replicates as strip plots. These were started after the last six harvests year, seeding: winter-irrigated throughout growing season (winter full), terminated 4th harvest limited), irrigated from mid-April, when canal typically becomes available, remainder (season or typically-irrigated until limited). Annual dry matter (DMY) increased using winter compared season-only (10.34, 8.94, 8.67, 6.54 Mg ha−1 full, limited, respectively, p < 0.0001, SEM 0.45). Irrigation termination fourth no significantly reduced annual applied use efficiency (AAWUE) all other treatments (9.08, 8.59, 8.82, 7.38 kg DMY mm−1 respectively; 0.0098, = 0.38). Winter fill soil profile, followed by late summer termination, feasible increasing productivity irrigation.

Language: Английский

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Water–Fertilizer Synergistic Effects and Resource Optimization for Alfalfa Production: A Central Composite Design and Response Surface Methodology Approach

Plants, Journal Year: 2025, Volume and Issue: 14(5), P. 731 - 731

Published: Feb. 27, 2025

This study posits that strategically optimizing irrigation and fertilization regimes can enhance the productivity water use efficiency (WUE) of alfalfa (Medicago sativa L.), thereby mitigating constraints imposed by soil impoverishment scarcity in forage production systems arid semi-arid regions. Conducted over two years, outdoor pot experiment investigated effects regulation during branching bud stages (each at 60–100% θ0.85, where θ0.85 = 0.85θfc) different levels nitrogen phosphorus (0–280 kg/ha each) on yield WUE. Using Response Surface Methodology (RSM) with a Central Composite Design (CCD), we modeled relationships between input variables key response parameters: total yield, evapotranspiration (ET), The surface models exhibited high reliability, coefficients determination R2, adjusted predicted adequate precision exceeding 0.94, 0.90, 0.86, 13.6, respectively. Sensitivity analysis indicated critical growth stages, particularly stage, had most significant impact ET, while positively influenced Within appropriate range management, judicious significantly enhanced performance, although excessive inputs resulted diminishing returns. identified optimal conditions for sustainable production: stage (82.26–83.12% θ0.85) (78.11–88.47% θ0.85), along application (110.59–128.88 kg/ha) (203.86–210 kg/ha). These findings provide practical guidelines improving sustainability resource-limited environments.

Language: Английский

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Regulation of alfalfa growth, water and nitrogen utilization and distribution in arid region of Northwest China by optimizing irrigation method

Frontiers in Plant Science, Journal Year: 2025, Volume and Issue: 16

Published: March 12, 2025

The water and nitrogen use efficiency of alfalfa is very low in the arid region Northwest China currently. In this field experiments 2022 2023, effects traditional flood irrigation (FI-12, 1200 mm; FI-8, 880 mm), sprinkler (SI-8, SI-5, 520 subsurface drip (DI-5, DI-8, mm)) on yield, (WUE), (NUE) were studied. results showed that DI SI treatments, especially DI-5, increased seed yield by increasing number inflorescences pods compared with FI treatments. DI, reduced loss during first two crops each growing season improving WUE. treatments had lowest root/shoot ratio (R/S), which facilitated distribution photosynthetic products to reproductive organs inhibited overgrowth root system. small R/S late growth stage DI-5 treatment also helped achieve high Besides, largest length density, promoted uptake utilization alfalfa. accumulation plants, soil nitrate (NO 3 − -N) leaching NH volatilization at maturity NUE. summary, fertigation, coordinated vegetative growth, loss, leaching, volatilization, WUE, NUE This study will advance understanding mechanism regulating use, provide a scientific basis for application fertigation semi-arid areas.

Language: Английский

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Deficit Irrigation Provides a Trade-Off Between Water Use and Alfalfa Quality

Agronomy, Journal Year: 2025, Volume and Issue: 15(4), P. 932 - 932

Published: April 11, 2025

Currently, the world is facing a serious agricultural water crisis, which also affects grassland areas. Alfalfa, key perennial forage legume, consumes about 10% of China’s pastoral irrigation water. Reducing generally results in loss hay yield, but effects on alfalfa quality and its relationship to use are less clear. In this study, we explore under different deficits Hexi Corridor China. Alfalfa use, yield (relative feeding value (RFVyield) crude protein (CPyield)), efficiency (WUERFV) (WUECP)) were measured field experiment. showed negative correlation with quota (the determination coefficient for relative was 0.375 0.289). There positive between RFVyield 0.570 CPyield 0.631). The higher increased compensated quality. mild moderate deficit treatments lower WUERFV than both severe no treatments. Moderate or recommended be used one-year-old treatment. No beneficial improve two-year-old alfalfa.

Language: Английский

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A Comprehensive Review of Irrigation Practices and Challenges in Bangladesh: Pathways to Sustainable Agricultural Productivity

European Journal of Theoretical and Applied Sciences, Journal Year: 2024, Volume and Issue: 2(5), P. 834 - 861

Published: Sept. 1, 2024

Crop water is a critical input in any farming systems across the globe, especially developing countries South Asia where appropriate management remains major challenge such as case of Bangladesh. This review also aimed at describing changes status and perspective irrigation shift resource base from surface to groundwater early 1980s paved way ensure food self-sufficiency, feat country accomplished 1990s. But with increased use sources there have been some questions on sustainability this source, has seen back better techniques practices like micro-irrigation, drips auto irrigation. paper aims global irrigation, practicing contrast between gravity irrigators pressurized irrigators, besides focusing opportunities risks drip arid zones. It reviews issues confronted by Bangladesh climate change, sector problem, saving system. The discoveries advise that smart technologies should be included for efficiency so productivity not checked coming future. With regards this, it hope pinpoint areas enhanced support policy practice enhancement resources well meeting needs agricultural

Language: Английский

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