Water-Use Efficiency of Potted Pakchoi in Yunnan Laterite with Root Infiltration Irrigation and Anticlogging Emitter

Zhang, Yijie; Song, Shiyu; HaoLin, Yang; Wang, Xu; Guo, Pan; Yu, Yongxiang

doi:10.1061/(asce)ir.1943-4774.0001364

Cited by 4 publications

(13 citation statements)

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“…In both sets of tests, the irrigation pressure was set to 0.1 MPa. The irrigation scheme used in this study was adopted from experiments conducted by Yu et al (2015) and Zhang et al (2019a) .…”

Section: Methodsmentioning

confidence: 99%

“…The average of the five measurements was used as an approximate of the water content of that soil layer. The relationship between crop water consumption and soil water variations during greenhouse potted cultivation, as shown in Figure 3, can be expressed as (Oweis et al, 2011;Zhang et al, 2019a;Wu et al, 2020).…”

Section: Calculation Of Soil Water Content Correction Factormentioning

confidence: 99%

“…Root-zone micro-irrigation, which is a subsurface irrigation technique, is a new, water-saving irrigation technique that can significantly improve crop yield, quality, and WUE ( Zhang et al, 2019a ; de Deus et al, 2020 ). This technique uses flexibly configured independent subsurface micro-emitters to transport water and liquid fertilizers in a pipe to the major active layers of the crop root zone in a small, uniform, targeted, and precise flow, thus effectively reducing surface evaporation.…”

Section: Introductionmentioning

confidence: 99%

“…For the continuity of the study, based on the methods and findings of previous studies ( Yu et al, 2018 , Yu et al, 2015 ; Zhang et al, 2018 , 2019a , b ), this study first quantitatively examined the water content of a Yunnan SR at a small scale (flowerpot) under IG and in the absence of crop cultivation, and then the potential of IG for improving the WUE of a specific crop (Sichuan hot pepper) cultivated on the SR. Our results provide theoretical and experimental data support for the high-efficiency application of root-zone micro-irrigation in greenhouse agriculture in Yunnan, China.…”

Section: Introductionmentioning

confidence: 99%

“…Figure3shows an illustration of the relationship between crop water consumption and soil water variations based on the principle of water conservation.The relationship between crop water consumption and soil water variations during greenhouse potted cultivation, as shown in Figure3, can be expressed as(Oweis et al, 2011;Zhang et al, 2019a;Wu et al, 2020).…”

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confidence: 99%

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Water Content Variations and Pepper Water-Use Efficiency of Yunnan Laterite Under Root-Zone Micro-Irrigation

et al. 2022

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Understanding the water content variations in Yunnan laterite (red loam soil, SR) in small-scale environments and exploring the potential for crop water-use efficiency (WUE) improvement are crucial for improving water-saving irrigation technologies used in greenhouse agriculture in Yunnan, China. In this study, a closed-loop model for calculating soil water in greenhouse potted cultivation was established based on water conservation. A Yunnan SR, yellow sand soil (SY), and a 1:1 SR–SY mixture (SM) subjected to root-zone micro-irrigation or surface-drip irrigation were experimentally examined to compare their water content variations and pepper WUEs. The results showed that the soil type and soil type–irrigation mode interaction had significant effects on both soil evaporation and pepper WUE, and that the variations in soil evaporation with respect to time can be expressed using a cubic polynomial function. In small-scale greenhouse cultivation, IG has good water-saving potential and is suitable for the SR (which has a better water-retention capacity), whereas IM is more suitable for the SY (which has a better water-penetration capacity). Mixing certain proportions of the SY into the SR will effectively impact the water content variations and crop WUE and provide opportunities for further improving the water-saving efficiency.

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Section: Methodsmentioning

confidence: 99%

Section: Calculation Of Soil Water Content Correction Factormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Water Content Variations and Pepper Water-Use Efficiency of Yunnan Laterite Under Root-Zone Micro-Irrigation

et al. 2022

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Solar-Thermophysical Irrigation Instrument for Container Plants

Sadeghzadeh

Jannati

Melekinezhad

2022

J. Irrig. Drain Eng.

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Factors Influencing Emitter Clogging Caused by Negative Pressure in Potted Yunnan Laterite with Root-Zone Infiltration Irrigation

Zhang¹,

Zhang²,

Yu³

et al. 2019

Transactions of the ASABE

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Abstract. In this study, an equivalent mechanical model was established for the clogging induced by soil suction under negative pressure during root-zone infiltration irrigation in a crop-free pot, and a state diagram was plotted for the clogging process induced by a single soil suction factor under negative pressure. Three groups of impact factor experiments were conducted using three different emitters: a flow-adjustable emitter with eight horizontal outlets (emitter L), a flow-adjustable emitter with two vertical outlets (emitter Q), and an anti-clogging material wrapped around the outer surface of emitter L (emitter K). The first group of experiments investigated the influence of irrigation pressure, the variation of irrigation pressure (range of 0.02 to 0.12 MPa), and the amount of sediment inside emitter L in Yunnan laterite. For the second group of experiments, two soil types (Yunnan laterite and yellow sand), two single-event irrigation volumes (170 and 250 mL), and two numbers of irrigation events (8 and 16) were used to quantitatively analyze the sediment content in emitter L. The third group of experiments used emitters L, Q, and K and involved quantitative analysis of the clogging differences in the different emitter types with two soil types (Yunnan laterite and yellow sand) and two numbers of irrigation events (24 and 64). Statistical analysis showed that irrigation pressure, soil type, irrigation pattern, and emitter type were significant (p < 0.05) for the amount of sediment due to negative suction inside the emitter. The results demonstrate that emitter clogging induced by negative pressure tends to first decrease and then increase with increasing irrigation pressure. The amount of sediment that accumulates within an emitter is influenced by both the soil suction effect under negative pressure as well as soil flushing under positive pressure. Within emitter L, clogging induced by soil suction under negative pressure was more likely to occur when using Yunnan laterite rather than yellow sand soil. When both soil types were used in the test, emitter L was observed to be more prone to clogging induced by negative pressure compared to emitter Q, whereas emitter K exhibited the best anti-clogging performance. This study provides a quantitative account of the factors associated with clogging induced by negative pressure, and it provides a theoretical and experimental basis for gaining an in-depth understanding of emitter clogging during root-zone infiltration irrigation in Yunnan laterite. Keywords: Emitter, Negative-pressure clogging, Pot environment, Root-zone infiltration irrigation, Yunnan laterite.

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Water-Use Efficiency of Potted Pakchoi in Yunnan Laterite with Root Infiltration Irrigation and Anticlogging Emitter

Cited by 4 publications

References 5 publications

Water Content Variations and Pepper Water-Use Efficiency of Yunnan Laterite Under Root-Zone Micro-Irrigation

Water Content Variations and Pepper Water-Use Efficiency of Yunnan Laterite Under Root-Zone Micro-Irrigation

Solar-Thermophysical Irrigation Instrument for Container Plants

Factors Influencing Emitter Clogging Caused by Negative Pressure in Potted Yunnan Laterite with Root-Zone Infiltration Irrigation

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