Sound Water and Nitrogen Management Decreases Nitrogen Losses from a Drip-Fertigated Cotton Field in Northwestern China

Ma, Honghong; Yang, Tao; Niu, XinXiang; Hou, Zhenan; Ma, Xiao

doi:10.3390/su13021002

Cited by 13 publications

(8 citation statements)

References 37 publications

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“…Nitrogen which is not absorbed by crops because of the excessive irrigation or nitrogen is likely to be leached. Nitrogen leaching depends on the irrigation amount,fertilizer type, and fertilizer rate, and there is a strong interaction between the irrigation treatment and fertilizer rate [16].The results showed that the concentration of inorganic N(NH 4 + and NO 3 -) in leachate water decreased significantly with the reduction of N fertilization [18][19][20][21][22]. This result is consistent with our study.…”

Section: Discussionsupporting

confidence: 89%

“…The amount of N lost by surface runoff or subsurface leaching is equal to the sum of N in each runoff (or leaching) in the whole monitoring cycle (a complete anniversary), where the N in each runoff with unit kg hm −2 is obtained by the concentration of N in each runoff (or leaching) water multiplied by the volume of runoff water (or leaching) [18].…”

Section: Calculation Methods Of N Leaching and Leaching Ratementioning

confidence: 99%

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Effect of nitrogen application on nitrogen leaching pattern and leaching loss from drip irrigated cotton fields in Southern Xinjiang

Ma¹,

Yang

Pu³

et al. 2023

Environ. Res. Commun.

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Farmers provided excessive nitrogen fertilizer to obtain high cotton yield in Xinjiang, Northwest China. Although drip irrigation could save water resources and improve nitrogen use efficiency, it is not known if leaching is occurring or not and whether leaching will harm the water environment under different nitrogen application. The purpose of our study was to estimate the effect of different nitrogen (N) application on the N leaching loss in drip irrigated cotton fields in South Xinjiang. A field experiment was conducted with N application rates of 317(N317), 395(N395) and 476(N476) kg hm-2 from 2021 to 2022. The characteristics of N pattern and leaching amount were analyzed. The concentration of NO3- and total nitrogen in the leaching water significantly decreased with the decrease of N application. The proportion of NO3–to total nitrogen reached the highest values of 51.52%-58.16%, 49.53%-56.91%, and 57.52%-62.87% at bud, flower, and boll stages of cotton, respectively. Moreover, the proportion of NO3– to total nitrogen remained at a stable level, which indicated that NO3–was the main pattern of N leaching. The N loss in the treatment N395 and N317 was 79.67% and 67.48% of that in the N476 treatment (1.23 kg hm–2), while the yield was 120.56% and 112.46% of that in the N476 treatment. Compared with conventional fertilizer application (476 kg hm-2), the reasonable N fertilizer application would not only reduce the amount of N leaching, but also increase the cotton yield.

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Section: Discussionsupporting

confidence: 89%

Section: Calculation Methods Of N Leaching and Leaching Ratementioning

confidence: 99%

Effect of nitrogen application on nitrogen leaching pattern and leaching loss from drip irrigated cotton fields in Southern Xinjiang

Ma¹,

Yang

Pu³

et al. 2023

Environ. Res. Commun.

Self Cite

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“…A large number of studies have shown that drip irrigation is conducive to improving crop N use efficiency and reducing the risk of N loss [8,9]. However, most of these studies have used common N fertilizer as the N source.…”

Section: Introductionmentioning

confidence: 99%

Drip Irrigation Reduced Fertilizer Nitrogen Loss from Lettuce Field—A Case Study Based on 15N Tracing Technique

Jin

You

Xie

et al. 2022

Water

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Nitrogen losses under different irrigation modes have been evaluated by many studies, yet it is not very clear whether the lost N sources are from the soil or fertilizer. In order to quantitatively investigate the effects of different irrigation modes on fertilizer N loss, we used the 15N-labeledurea (15N abundance of 19.6%) as fertilizer and the lettuce (Lactuca sativa var. angustana iris) as the plant material to conduct a field experiment under three different lower limits of drip irrigation, including 75% (DR1), 65% (DR2) and 55% (DR3), accounting for the field water capacity. A furrow irrigation treatment (FI) with the same irrigation regime as DR2 was used as the control. The fate and balance of 15N under these treatments were studied. The results showed that, after the lettuce harvest, 36.9–48.8% of the applied fertilizer 15N remained in 0–80-cm soil, 32.6–39.4% was absorbed by plants, and 18.6–26.3% was lost via pathways such as volatilization or leaching. Under the same irrigation regime, 15N loss caused by FI (26.3%) was significantly (p < 0.05) higher than that byDR2 (18.9%). Moreover, FI increased the amount of total 15N, mineral 15N and organic 15N in the deeper soil layers (60 cm depth and below), leading to a potential risk of 15N leaching. The soil 15N residue was relatively lower under DR1, while the crop-absorbed15Nor15N loss was atthe highest level among the three drip irrigation treatments. The correlation analysis results showed that increasing the total irrigation amount or increasing the irrigation frequency might increase the15N loss. We concluded that using drip irrigation instead of furrow irrigation with controlling the lower irrigation limit at 65% is conducive to improving crop 15N utilization and reducing 15N loss from lettuce fields.

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“…China’s N fertilizer consumption is only 26% of the world’s consumption to produce 21% of the world’s grain [ 2 ]. Higher N application can lead to lower N use efficiency [ 3 ] and excessive N input can lead to increased nitrate leaching and environmental pollution [ 4 ]. On the contrary, studies have shown that insufficient nutrient availability can seriously affect plant growth [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Acclimation of sugar beet in morphological, physiological and BvAMT1.2 expression under low and high nitrogen supply

et al. 2022

PLoS ONE

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Understanding the response and tolerance mechanisms of nitrogen (N) stress is essential for the taproot plant of sugar beet. Hence, in this study, low (0.5 and 3 mmol/L; N0.5 and N3), moderate (5 mmol/L; N5; control) and high (10 and 12 mmol/L; N10 and N12) N were imposed to sugar beet to comparatively investigate the growth and physiological changes, and expression pattern of the gene involving ammonia transporting at different seedling stages. The results showed that, different from N5 which could induce maximum biomass of beet seedlings, low N was more likely to inhibit the growth of beet seedlings than high N treatments. Morphological differences and adverse factors increased significantly with extension of stress time, but sugar beet seedlings displayed a variety of physical responses to different N concentrations to adapt to N abnormal. At 14 d, the chlorophyll content, leaf and root surface area, total dry weight and nitrogen content of seedlings treated with N0.5 decreased 15.83%, 53.65%, 73.94%, 78.08% and 24.88% respectively, compared with N12; however, the root shoot ratio increased significantly as well as superoxide dismutase (SOD), peroxidase (POD), glutamine synthetase (GS) activity and malondialdehyde (MDA) and proline content, especially in root. The expression of BvAMT1.2 was also regulated in an N concentration-dependent manner, and was mainly involved in the tolerance of beet leaves to N stress, which significantly positively correlated to GS activity on the basis of its high affinity to N. It can be deduced that the stored nutrients under low N could only maintain relatively stable root growth, and faced difficulty in being transported to the shoots. Sugar beet was relatively resilient to N0.5 stress according to the mean affiliation function analysis. These results provide a theoretical basis for the extensive cultivation of sugar beet in N-stressed soil.

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Sound Water and Nitrogen Management Decreases Nitrogen Losses from a Drip-Fertigated Cotton Field in Northwestern China

Cited by 13 publications

References 37 publications

Effect of nitrogen application on nitrogen leaching pattern and leaching loss from drip irrigated cotton fields in Southern Xinjiang

Effect of nitrogen application on nitrogen leaching pattern and leaching loss from drip irrigated cotton fields in Southern Xinjiang

Drip Irrigation Reduced Fertilizer Nitrogen Loss from Lettuce Field—A Case Study Based on 15N Tracing Technique

Acclimation of sugar beet in morphological, physiological and BvAMT1.2 expression under low and high nitrogen supply

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