Maize is stressed by salt rather than water under drip irrigation with soil matric potential higher than −50 kPa in an arid saline area

2021 ◽  
Author(s):  
Tibin Zhang ◽  
Xiangxiang Ji ◽  
Xiaoyun Zhan ◽  
Yuntao Ding ◽  
Yufeng Zou ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Soil Matric Potential ◽  
Matric Potential ◽  
Saline Area

scholarly journals Salt leaching of heavy coastal saline silty soil by controlling the soil matric potential

2019 ◽  
Vol 14 (No. 3) ◽  
pp. 132-137 ◽  
Author(s):  
Xiuping Wang ◽  
Zhizhong Xue ◽  
Xuelin Lu ◽  
Yahui Liu ◽  
Guangming Liu ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
Crop Production ◽  
Bohai Bay ◽  
Soil Matric Potential ◽  
Effective Management ◽  
Matric Potential ◽  
Silty Soil ◽  
Salt Leaching ◽  
Profile Depth ◽  
Oil Sunflower

Techniques of drip irrigation are broadly applied for the reclamation of saline-alkali lands, during which effective management of water use to accelerate salt leaching is essential for crop production. In 2017, a field experiment with five treatments of soil matric potential (SMP) levels of −5, −10, −15, −20, and −25 kPa was conducted in heavy saline silty soil land in Bohai Bay, China to study the effects of drip irrigation on salt leaching. The results showed that salt leaching was enhanced with increasing SMP, particularly under an SMP of −5 kPa within a 30 cm soil profile depth and 15 cm distance from the dripper, and the average electrical conductivity of saturated paste extracts (ECe) decreased from 13.8 to 1.52 dS/m. Water consumption increased with increasing SMP, but the yield of oil sunflower did not differ significantly between SMPs of –5 and –10 kPa. These findings indicated that a relatively high crop yield of oil sunflower and effective salt leaching can be achieved if the SMP can be controlled at –10 kPa in heavy saline silty soil.  

scholarly journals Effects of Drip Irrigation Configuration and Rate on Yield and Fruit Quality of Young Highbush Blueberry Plants

HortScience ◽  
2012 ◽  
Vol 47 (3) ◽  
pp. 414-421 ◽  
Author(s):  
David L. Ehret ◽  
Brenda Frey ◽  
Tom Forge ◽  
Tom Helmer ◽  
David R. Bryla
Keyword(s):  
Fruit Quality ◽  
Drip Irrigation ◽  
Vaccinium Corymbosum ◽  
Highbush Blueberry ◽  
Anthocyanin Content ◽  
Soil Matric Potential ◽  
Matric Potential ◽  
Total Anthocyanin ◽  
Irrigation Volume

A 4-year study was conducted to establish the effects of drip irrigation configuration and rate on fruit yield and quality of young highbush blueberry plants (Vaccinium corymbosum L. ‘Duke’). Plants were grown in a silt loam soil on raised beds and were non-irrigated or irrigated using either one or two lines of suspended drip tape. Each line configuration had in-line emitters spaced every 0.3 or 0.45 m for a total of four drip configurations. Water was applied by each drip configuration at two rates, a moderate rate of 5 L/plant per irrigation event, and a heavy rate of 10 L/plant. The frequency of irrigation was guided by measurements of soil matric potential. Irrigation was applied each year, and plants were cropped beginning the second year after planting. Rainfall was above normal in the first 2 years of the study, and differences in soil moisture were most evident in the last 2 years, in which soil matric potential increased with irrigation volume. Neither the number of irrigation lines nor emitter spacing had an effect on yield or fruit quality. Yield was unaffected by irrigation rate until the fourth year after planting and was only higher when 5 L/plant was applied. The yield increase was the result of differences in fruit weight during the second of two harvests and was associated with delays in fruit maturation. Irrigation affected plant mineral concentrations but leaves and berries responded differently; affected minerals tended to decrease in leaves but increase in the fruit. Many irrigation-induced changes in fruit quality were evident 1 or 2 years before changes in yield. Higher irrigation volume increased fruit size and water content but reduced fruit firmness and soluble solids. Irrigation reduced fruit water loss during storage and thereby promoted longer shelf life. Irrigation also resulted in a change in anthocyanin composition in the fruit but did not affect antioxidants or total anthocyanin content.

scholarly journals Integrated use of saline water and rootzone matric potential control for saline soil reclamation and shrub growth

2021 ◽  
Author(s):  
Chen Zhang ◽  
Xiaobin Li ◽  
Yaohu Kang
Keyword(s):  
Survival Rate ◽  
Drip Irrigation ◽  
Rainy Season ◽  
Saline Soil ◽  
Saline Water ◽  
Soil Reclamation ◽  
Soil Matric Potential ◽  
Matric Potential ◽  
Potential Control ◽  
The Third

A four-year field experiment was carried out to evaluate an integrated use of saline water for the saline soil reclamation in Hebei Province of North China. A landscape shrub (Caryopteris × clandonensis ‘Worcester Gold’) was cultivated using drip irrigation scheduled by rootzone soil matric potential control at five levels of water salinity (ECi): 0.8, 3.1, 4.7, 6.3, and 7.8 dS·m−1. Soil matric potential control was applied using a threshold of −5, −10, −15, and −20 kPa in the first, second, third, and fourth year, respectively. After four growing seasons, the saline soil (initial ECe value of 27.8 dS·m−1) was reclaimed to slightly saline soil for 0–1 m depth (4.1–7.2 dS·m−1) under drip irrigation with saline water of ECi < 7.8 dS·m−1. The salt leaching efficiency of root zone soil was highest in the first year and lowered year-by-year. The plants strongly responded to the different soil water and salinity regime. Significant decreases in survival rate, plant growth, and shoot dry weight in response to increasing ECi were found. To achieve a relative survival rate of >50%, the threshold salinity of irrigation water for ‘Worcester Gold’ cultivation was 7.8, 7.0, 5.6, and 5.3 dS·m–1, for the first, second, third, and fourth growing season, respectively. It is recommended to use an inter-seasonal evolving matric potential threshold of −10 kPa for dry season of the third year, −15 kPa for rainy season of the third year and dry season of the fourth year, and −20 kPa for rainy season of the fourth year.

scholarly journals Estimating soil matric potential in Owens Valley, California

1988 ◽  
Author(s):  
Stephen K. Sorenson ◽  
R.F. Miller ◽  
M.R. Welch ◽  
D.P. Groeneveld ◽  
F.A. Branson
Keyword(s):  
Soil Matric Potential ◽  
Owens Valley ◽  
Matric Potential
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