Negative pressure irrigation increases vegetable water productivity and nitrogen use efficiency by improving soil water and NO3–-N distributions

Li, Shengping; Tan, Deshui; Wu, Xueping; Degré, A.; Long, Huaiyu; Zhang, Shuxiang; Lu, Jing; Gao, Lili; Fang, Zheng; Liu, Xiaotong; Liang, Guopeng

doi:10.1016/j.agwat.2021.106853

Cited by 26 publications

(33 citation statements)

References 53 publications

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“…It has always been a challenge to keep the soil water content stable in the range suitable for crop growth. However, researchers have invented the NPI irrigation system, which achieved to maintain soil water content relatively stable [18]. Although the soil moisture content of SW has certain fluctuations during the growing season, it was always maintained within the range of 80±2% of the field water holding capacity.…”

Section: Discussionmentioning

confidence: 99%

“…This promoted the leaf growth and the relative content of chlorophyll [13,32]. The rate of photosynthesis in maize was significantly increased, which increased the accumulation of photosynthetic products, dry matter, yield and economic water use efficiency [18,33]. Lack of compensating growth effect of maize under the stable soil water content, enhances coordination of vegetative and reproductive growth, thereby increasing the economic coefficient, and hence promote maize production [24].…”

Section: Plos Onementioning

confidence: 99%

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Transcriptome analysis reveals the molecular mechanism of yield increases in maize under stable soil water supply

Zhang

Wang

et al. 2021

PLoS ONE

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This study explored the physiological and molecular mechanisms of yield increase in maize under stable soil water content (SW) conditions. Results of the study showed that under SW conditions, corn yield increased by 38.72 and 44.09% in 2019 and 2020, respectively. Further, it was found that dry matter accumulation, economic coefficient and photosynthetic rate also increased by 31.24 and 25.67%, 5.45 and 15.38% as well as 29.60 and 31.83% in 2019 and 2020 respectively. However, the results showed that both the activity of antioxidant enzymes and content of osmotic adjustment substances decreased in maize under SW conditions. When compared with soil moisture content of dry and wet alternation (DW) conditions, SW could not only significantly promote growth and yield of maize but also increase the economic coefficient. Transcriptome profiles of maize leaves under the two conditions (SW and DW) were also analyzed and compared. It was found that 11 genes were highly up-regulated in the photosynthesis pathway. These genes included photosystem II protein V (PsbE), photosystem II protein VI (PsbF), photosystem II protein D1 (PsbA), photosystem II protein D2 (PsbD) and ATP synthase CF1 beta subunit (atpB). Further, it was found that four genes were up-regulated in the oxidative phosphorylation pathway., These were ATP synthase CF1 epsilon subunit (atpE), ATP synthase CF1 beta subunit (atpB), NADH dehydrogenase subunit 4L (ndhE) and NADH dehydrogenase subunit 6 (ndhG). In conclusion, the physiological mechanism of stable soil water content (SW) to increase corn yield may be the enhancement of photosynthetic capacity and energy metabolism.

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Section: Discussionmentioning

confidence: 99%

Section: Plos Onementioning

confidence: 99%

Transcriptome analysis reveals the molecular mechanism of yield increases in maize under stable soil water supply

Zhang

Wang

et al. 2021

PLoS ONE

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“…Negative pressure irrigation (NPI) is a new type of subsurface irrigation method that assists crop roots in the uptake and utilization of water and fertilizers [1][2][3]. NPI is based on crop water consumption characteristics and soil tension.…”

Section: Introductionmentioning

confidence: 99%

“…It can continuously and stably supply water and nutrition to the rhizosphere to avoid the loss of soil moisture and nutrients [1,4,5]. Since the NPI system supplies nitrogen (N) fertilizer and water in the rhizosphere, it improves the N utilization efficiency (NUE) of crops [3]. Its energy-saving technology has led to it being used in greenhouse and field trials [3,6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Since the NPI system supplies nitrogen (N) fertilizer and water in the rhizosphere, it improves the N utilization efficiency (NUE) of crops [3]. Its energy-saving technology has led to it being used in greenhouse and field trials [3,6,7]. In previous research on NPI, the yield of cucumbers, spinach, tomato, cabbage, and other crops was increased by 17~51%, while water consumption was reduced by 14~53% compared with traditional irrigation [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Negative Pressure Irrigation System Reduces Soil Nitrogen Loss for Lettuce during Greenhouse Production

et al. 2021

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Negative pressure irrigation (NPI) to grow crops reduces the application of fertilizer and water while also promoting yield and quality. However, plantation vegetables usually require a large input of nitrogen (N) fertilizer in a greenhouse setting, which will lower the soil quality and accelerate the emission of greenhouse gases. Therefore, the purpose of this research was to explore planting lettuce under an NPI system that retrenches N fertilizer application and mitigates N2O emissions compared with conventional irrigation (CI). This research proved that under NPI conditions, nitrate and ammonium fluctuated slightly in the soil, stabilizing in the range of 18–28 mg kg−1, while that of CI was 20–55 mg kg−1. The NPI alleviated N2O emissions, and NPI-N150 and NPI-N105 decreased them by 18% and 32%, respectively, compared with those for CI-N150. The main explanation was that the NPI inhibited the formation of NO3−-N, reduced the copies number of AOA and AOB as well as the abundance of Nitrospira in the soil, and weakened the soil nitrate reductase and urease activities. The results of this research provide a reliable scientific method for reducing the use of water and N fertilizer while cultivating lettuce, as well as for reducing N2O emissions from agricultural facilities.

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Nitrogen addition mediates the effect of soil microbial diversity on microbial carbon use efficiency under long‐term tillage practices

Zhang

et al. 2022

Land Degrad Dev

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Tillage practices can influence soil microbial carbon use efficiency (CUE), which is critical for carbon cycling in terrestrial ecosystems. The effect of tillage practices could also be regulated by nitrogen (N) addition. However, the soil microbial mechanism relating to N fertilizer effect on microbial CUE under no‐tillage (zero‐tillage) is still unclear. We investigated how N fertilizer regulates the effect of tillage management on microbial CUE through changing microbial properties and further assessed the impact of microbial CUE on particulate (POC) and mineral‐associated organic matter carbon (MAOC). For this we used a 16‐year field experiment with no‐tillage (NT) and conventional tillage (CT), both of which combined with 105 (N1), 180 (N2), and 210 kg N ha−1 (N3) N application. We found that microbial CUE increased with increasing N application rate. NT increased microbial CUE compared with CT in the 0–10 cm. The bacterial and fungal diversities of NT were higher than CT and N application decreased their diversities in 0–10 cm. The partial least squares path model showed that bacterial and fungal diversity had a significant influence on microbial CUE. Furthermore, POC and MAOC under NT were higher than CT and they also increased with increasing N application rate. It suggested that increasing microbial CUE induced by N application had the potential to increase POC and MAOC. Overall, this study highlights that N addition can alter the effect of soil microbial diversity on CUE, which further improves our understanding to explain and predict the fractions of SOC (i.e., POC and MAOC) in tillage systems.

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Negative pressure irrigation increases vegetable water productivity and nitrogen use efficiency by improving soil water and NO3–-N distributions

Cited by 26 publications

References 53 publications

Transcriptome analysis reveals the molecular mechanism of yield increases in maize under stable soil water supply

Transcriptome analysis reveals the molecular mechanism of yield increases in maize under stable soil water supply

Negative Pressure Irrigation System Reduces Soil Nitrogen Loss for Lettuce during Greenhouse Production

Nitrogen addition mediates the effect of soil microbial diversity on microbial carbon use efficiency under long‐term tillage practices

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