Effects of phosphorus-fertigation on emitter clogging in drip irrigation system with saline water

Muhammad, Tahir; Zhou, Bo; Liu, Zeyuan; Chen, Xiuzhi; Li, Yunkai

doi:10.1016/j.agwat.2020.106392

Cited by 54 publications

(28 citation statements)

References 40 publications

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“…This indicates that the weak acidity of the mixed MAP and U solution could no longer protect the emitters from clogging effectively when applying saline water with EC = 2 dS m À1 . The results agreed well with Muhammad et al (2021) who also reported that the UP performed better than a weak acidic fertilizer (monopotassium phosphate) in terms of anti-clogging properties when using saline water. The Dra for both types of emitters declined slowly at the beginning of the operation duration for the S 2 -U/(UP 0.2 + MAP 0.8 ) treatments.…”

Section: Temporal Variations In Emitter Discharge Ratesupporting

confidence: 90%

Determining injection strategies of phosphorus‐coupled nitrogen fertigation based on clogging control of drip emitters with saline water application^*

Zhen

Yang

2021

Irrigation and Drainage

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The beneficial effect of fertigation with acidic fertilizers to protect emitters from chemical and biological clogging might be inhibited by improper fertigation modes. An on-site drip irrigation experiment was conducted to investigate the injection strategies of phosphorus (P)-coupled nitrogen (N) fertigation and water salinity on clogging of emitters with plain channel and labyrinth structures. The results demonstrated that the H + in acidic P fertilizer solutions inhibited the precipitation of carbonate and phosphate simultaneously. However, a weak acidic P fertilizer could no longer protect the emitters from clogging effectively under saline water with an electrical conductivity (EC) exceeding 2 dS m À1 because the phosphate sediments accounted for more than 80% of the total clogging substances. A strategy of applying a weak acidic phosphate fertilizer following N fertigation performs better in reducing emitter clogging than fertigation using N and phosphate fertilizers together. The target pH values were obtained as 6.0, 4.0, and 3.0 for protecting emitters from clogging for drip irrigation systems applying irrigation water with an EC of 0.5, 2.0, and 4.0 dS m À1 , respectively. An optimal fertigation mode for emitter clogging control should consider water quality, type and pH value of fertilizer, and emitter type comprehensively. K E Y W O R D S acid phosphate fertilizers, electrical conductivity, micro-irrigation Résumé L'effet bénéfique de la fertigation avec des engrais acides pour protéger les émetteurs du colmatage chimique et biologique pourrait être inhibé par des modes de fertigation inappropriés. Une expérience d'irrigation goutte à goutte in-situ a été menée pour étudier les stratégies d'injection de fertigation à l'azote (N) couplé au phosphore (P) et la salinité de l'eau en cas de colmatage des émetteurs avec des structures en canal plat et en labyrinthe. Les résultats ont démontré que le H + dans les solutions d'engrais P acides inhibait la * Détermination des stratégies d'injection de fertigation à l'azote couplé au phosphore basées sur le contrôle du colmatage des émetteurs goutte à goutte avec application d'eau saline

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Section: Temporal Variations In Emitter Discharge Ratesupporting

confidence: 90%

Determining injection strategies of phosphorus‐coupled nitrogen fertigation based on clogging control of drip emitters with saline water application^*

Zhen

Yang

2021

Irrigation and Drainage

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“…A study involving soils from 18 different sites showed that Bacteroidetes were correlated with higher electrical conductivity [ 59 ]. In fact, Bacteroidetes are abundant in mesotrophic and eutrophic waters and are usually associated with high nutrient values [ 59 , 60 ]. Taken together, these results indicate that Firmicutes and Bacteroidetes were pivotal in salinized soil in Xinjiang, China, which could provide guidance for identifying rhizosphere growth-promoting bacteria (PGPB) as bioindicators in saline soil.…”

Section: Discussionmentioning

confidence: 99%

Responses of the Soil Microbial Community to Salinity Stress in Maize Fields

Hou

Zeng

Hou

et al. 2021

Biology

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To investigate the diversity and structure of soil bacterial and fungal communities in saline soils, soil samples with three increasing salinity levels (S1, S2 and S3) were collected from a maize field in Yanqi, Xinjiang Province, China. The results showed that the K+, Na+, Ca2+ and Mg2+ values in the bulk soil were higher than those in the rhizosphere soil, with significant differences in S2 and S3 (p < 0.05). The enzyme activities of alkaline phosphatase (ALP), invertase, urease and catalase (CAT) were lower in the bulk soil than those in the rhizosphere. Principal coordinate analysis (PCoA) demonstrated that the soil microbial community structure exhibited significant differences between different salinized soils (p < 0.001). Data implied that the fungi were more susceptible to salinity stress than the bacteria based on the Shannon and Chao1 indexes. Mantel tests identified Ca2+, available phosphorus (AP), saturated electrical conductivity (ECe) and available kalium (AK) as the dominant environmental factors correlated with bacterial community structures (p < 0.001); and AP, urease, Ca2+ and ECe as the dominant factors correlated with fungal community structures (p < 0.001). The relative abundances of Firmicutes and Bacteroidetes showed positive correlations with the salinity gradient. Our findings regarding the bacteria having positive correlations with the level of salinization might be a useful biological indicator of microorganisms in saline soils.

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“…There is a great practical significance to developing and utilizing the saline-alkali land reasonably, promoting regional development and sticking to the minimum cultivated land area of China. Mulched drip irrigation (MDI) technology can regulate the distribution of soil salt to improve the environment for root growth (Li et al 2019;Muhammad et al 2021). MDI has greatly promoted the development of the regional cotton industry since being introduced by Xinjiang Production and Construction Corps in 1996 (Wang et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Soil salinity variations and cotton growth under long-term mulched drip irrigation in saline-alkali land of arid oasis

Wang

Zhang

et al. 2021

Irrig Sci

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The sustainable development and utilization of saline-alkali land are closely related to holding fast the minimum cultivated land area of China. The change of soil salt in cotton field under long-term mulched drip irrigation (MDI) is connected with the development of the national cotton industry. From 2015 to 2019, five cotton fields with different applying years of MDI, which were reclaimed in 2004, 2008, 2010, 2012 and 2015 respectively and were saline-alkali wasteland before, were monitored continuously in the Manas River irrigation area of Xinjiang. By means of continuous location monitoring and spatial–temporal variability (For example, the monitoring data of cotton fields under MDI in 2004, 2008, 2010, 2012 and 2015, and in the year of 2015 were counted as 12, 8, 6, 4 and 1 years, respectively), the spatial–temporal variations of soil salt and ions in cotton field with 1-16a MDI technology were presented. The cotton growth characteristics and its main influencing factors were also analyzed in the study. The results showed that saline-alkali cotton field experienced changed from intensive saline soil to moderate saline soil and finally to non-saline soil under long-term MDI. The change of soil salt and the response of cotton growth to soil salt were divided into three typical stages. Firstly, soil desalinated rapidly in 1-4a MDI cotton field, which the annual average desalination rate was 24.93% in 0–100 cm soil layer (root zone). Additionally, the survival rate of cotton rocketed from 1.48% to 42.04%, and yield increased sharply from 72.43 kg ha−1 to 3075.90 kg ha−1. Soil desalination was lower in 5-11a MDI cotton field, which the annual average desalination rate was 10.92% at the root zone. The annual survival rate and yield of cotton increased by 6.26% and 5.18%, respectively. After 12a MDI, the soil salt in cotton field tended to be generally constant, which the average salt content in root zone was less than 2.49 g kg−1. The survival rate of cotton was stable above 90.39%, and the yield per unit area exceeded 5401.32 kg ha−1. Ions, sodium absorption ratio and Cl− and SO42− equivalent ratio (CSER) in cotton soil also decreased with the extension of MDI. Salt composition changed year by year, but the type of intensive saline soil had always been chloride-sulphate solonchak (0.2 < CSER < 1). In practice, with a higher irrigation quota and ideal irrigation water quality, the soil salt environment of saline-alkali soil MDI cotton field had developed in favor of cotton growth in an oasis irrigation area. However, this management practice caused between 124.21–143.61 mm of water resources waste. Therefore, we should further enhanced the consciousness of water-saving and implemented quota management in practice.

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Effects of phosphorus-fertigation on emitter clogging in drip irrigation system with saline water

Cited by 54 publications

References 40 publications

Determining injection strategies of phosphorus‐coupled nitrogen fertigation based on clogging control of drip emitters with saline water application^*

Determining injection strategies of phosphorus‐coupled nitrogen fertigation based on clogging control of drip emitters with saline water application^*

Responses of the Soil Microbial Community to Salinity Stress in Maize Fields

Soil salinity variations and cotton growth under long-term mulched drip irrigation in saline-alkali land of arid oasis

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Effects of phosphorus-fertigation on emitter clogging in drip irrigation system with saline water

Cited by 54 publications

References 40 publications

Determining injection strategies of phosphorus‐coupled nitrogen fertigation based on clogging control of drip emitters with saline water application*

Determining injection strategies of phosphorus‐coupled nitrogen fertigation based on clogging control of drip emitters with saline water application*

Responses of the Soil Microbial Community to Salinity Stress in Maize Fields

Soil salinity variations and cotton growth under long-term mulched drip irrigation in saline-alkali land of arid oasis

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Product

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Determining injection strategies of phosphorus‐coupled nitrogen fertigation based on clogging control of drip emitters with saline water application^*

Determining injection strategies of phosphorus‐coupled nitrogen fertigation based on clogging control of drip emitters with saline water application^*