The effect of combined application of super absorbent polymer and fulvic acid on growth and water use efficiency of pot cultured corn*

2014 ◽  
Keyword(s):  
Water Use Efficiency ◽  
Fulvic Acid ◽  
Water Use ◽  
Super Absorbent Polymer ◽  
Combined Application ◽  
Use Efficiency ◽  
Absorbent Polymer

Super Absorbent Polymer and Irrigation Regime Effects on Growth and Water Use Efficiency of Container-Grown Cherry Tomatoes

2018 ◽  
Vol 61 (2) ◽  
pp. 523-531 ◽  
Author(s):  
Rahul Suresh ◽  
Shiv O. Prasher ◽  
Ramanbhai M. Patel ◽  
Zhiming Qi ◽  
Eman Elsayed ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Residue Analysis ◽  
Soil Toxicity ◽  
Super Absorbent Polymer ◽  
Growing Medium ◽  
Use Efficiency ◽  
The Mean ◽  
Absorbent Polymer ◽  
Cherry Tomatoes

Abstract. There is a need to develop innovative techniques to effectively use water in agriculture to meet the growing demands for food. Super absorbent polymers (SAPs), or hydrogels, can absorb and retain large amounts of water against gravitational forces and release it on demand to meet plant water requirements. Being an artificially synthesized compound, it is imperative that SAPs should not introduce toxicity to the growing medium or produce. The objectives of this study were to determine whether SAPs can improve water use efficiency (WUE) and the physiological growth of cherry tomatoes ( var. ) without causing soil toxicity. A pot-trial experiment was carried out in 2014 at the Research Greenhouse of McGill University’s Macdonald Campus (Ste-Anne-de-Bellevue, Quebec, Canada) in a completely randomized design, with three concentrations of SAP (0%, 0.1%, and 0.5%) and three irrigation intervals (daily, each alternate day, and every third day). The mean yield of the experimental cherry tomatoes was statistically significantly higher where 0.5% SAP was applied, compared to where SAP was not applied (p = 0.0056). The mean WUE was also higher where 0.5% SAP was applied when compared to where SAP was not applied (p = 0.05). To ascertain food safety, the presence of free acrylamide monomer in tomatoes was checked. The acrylamide concentrations were below the detection limit of 5 µg kg-1 in all tomato samples. To assess environmental toxicity, a Microtox toxicology analysis was also conducted on the growing medium, which revealed that the SAP used in the study was not toxic. Therefore, it can be concluded that the application of SAP could increase yield and WUE of greenhouse-grown cherry tomatoes. It also appears that SAP did not introduce toxic side-effects in the soil nor in the tomatoes, as determined by Microtox acute toxicity test and acrylamide residue analysis with LC-MS. Keywords: Acrylamide, Cherry tomatoes, Greenhouse, Microtox, Monomer, Super absorbent polymer, Toxicity, Water use efficiency, Yield.

scholarly journals Effect of Super Absorbent Polymer and Irrigation Deficit on Water Use Efficiency, Growth and Yield of Cotton

2015 ◽  
Vol 7 (3) ◽  
pp. 338-344 ◽  
Author(s):  
Hamid-Reza FALLAHI ◽  
Reza TAHERPOUR KALANTARI ◽  
Mahsa AGHHAVANI-SHAJARI ◽  
Mohammad-Ghasem SOLTANZADEH
Keyword(s):  
Water Stress ◽  
Water Use Efficiency ◽  
Water Use ◽  
Growth And Yield ◽  
Control Treatment ◽  
Super Absorbent Polymer ◽  
Irrigation Deficit ◽  
Use Efficiency ◽  
Absorbent Polymer ◽  
Water Holding

Sustainable use of water resources in agriculture is a necessity for many arid countries. In order to investigate the effect of water deficit, irrigation after 120 (control), 155 (moderate water stress) and 190 mm (sever water stress) pan evaporation and super absorbent polymer rates (SAP) (0, 30, 60 and 90 kg ha-1) on growth, yield and water use efficiency of cotton, an experiment was conducted as split plot based on a randomized complete block design with three replications. Moreover, the effect of water quality (distilled water and solutions of 0.25, 0.5, 0.75, 1 and 1.25% NaCl) was investigated on water holding capacity by SAP. Results revealed that moderate water stress (irrigation intervals of aprox. 15 days) along with 60 kg ha-1 SAP application was the best treatment in terms of growth and yield indices of cotton. The results for plant height, plant dry weight, boll number per plant and fiber yield in this treatment were 16, 28, 42 and 10% higher than control treatment, respectively. Water deficit and SAP application improved the water use efficiency (WUE) of cotton. The amount of WUE in moderate water stress treatment along with consumption of 60 or 90 kg ha-1 SAP was 26% higher than for control treatment. In addition, water holding capacity by SAP in distilled water treatment was 7 times higher than in the case of 1.25% NaCl solution. The overall results showed that irrigation deficit and SAP application are two appropriate strategies for crop production in areas affected by drought stress, especially if low saline water sources are used.

scholarly journals Effect of Super Absorbent Polymer and Irrigation Deficit on Water Use Efficiency, Growth and Yield of Cotton

2015 ◽  
Vol 7 (3) ◽  
Author(s):  
Hamid-Reza FALLAHI ◽  
Reza TAHERPOUR KALANTARI ◽  
Mahsa AGHHAVANI-SHAJARI ◽  
Mohammad-Ghasem SOLTANZADEH
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Growth And Yield ◽  
Super Absorbent Polymer ◽  
Irrigation Deficit ◽  
Use Efficiency ◽  
Absorbent Polymer

Increasing intrinsic water-use efficiency over the past 160 years does not stimulate tree growth in southeastern China

2018 ◽  
Vol 76 (2) ◽  
pp. 115-130 ◽  
Author(s):  
G Guo ◽  
K Fang ◽  
J Li ◽  
HW Linderholm ◽  
D Li ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Tree Growth ◽  
Southeastern China ◽  
The Past ◽  
Intrinsic Water Use Efficiency ◽  
Use Efficiency

A comparative appraisal of urea super granule application in raised bed and prilled urea application in conventional planting for transplanted boro rice (Oryza sativa)

2016 ◽  
Vol 6 (1) ◽  
pp. 822-832
Author(s):  
Halim Mahmud Bhuyan ◽  
Most. Razina Ferdousi ◽  
Mohammad Toufiq Iqbal ◽  
Ahmed Khairul Hasan
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
N Fertilizer ◽  
Deep Placement ◽  
Prilled Urea ◽  
Planting Methods ◽  
Weed Infestation ◽  
Use Efficiency ◽  
Raised Bed ◽  
Boro Rice

Utilization of urea super granule (USG) with raised bed cultivation system for transplanted boro (winter, irrigated) rice production is a major concern now days. A field experiment was conducted in the chuadanga district of Bangladesh to compare the two cultivation methods: deep placement of USG on raised bed with boro rice, and prilled urea (PU) broadcasting in conventional planting. Results showed that USG in raised bed planting increased grain yields of transplanted boro rice by up to 18.18% over PU in conventional planting. Deep placement of USG in raised bed planting increased the number of panicle m-2, number of grains panicle-1 and 1000-grains weight of boro rice than the PU in conventional planting. Better plant growth was observed by deep placement of USG in raised bed planting compared to PU in conventional planting. Sterility percentage and weed infestation were lower on USG in raised bed planting compared to the PU in conventional planting methods. Forty seven percent irrigation water and application time could be saved by USG in raised bed planting than PU in conventional planting. Deep placement of USG in bed saved N fertilizer consumption over conventional planting. Water use efficiency for grain and biomass production was higher with deep placement of USG in bed planting than the PU broadcasting in conventional planting methods. Similarly, agronomic efficiency of N fertilizer by USG in bed planting was significantly higher than the PU broadcasting in conventional planting. This study concluded that deep placement of USG in raised bed planting for transplanted boro rice is a new approach to achieve fertilizer and water use efficiency as well as higher yield and less water input compared to existing agronomic practices in Bangladesh.

Effects of Irrigation Amount on Grain Starch Content, Starch Synthase Activity, and Water Use Efficiency in Wheat

2009 ◽  
Vol 35 (2) ◽  
pp. 324-333 ◽  
Author(s):  
Peng-Fei CHU ◽  
Zhen-Wen YU ◽  
Xiao-Yan WANG ◽  
Tong-Hua WU ◽  
Xi-Zhi WANG
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Starch Content ◽  
Starch Synthase ◽  
Irrigation Amount ◽  
Grain Starch ◽  
Use Efficiency
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