Effectiveness of a water-saving super-absorbent polymer in soil water conservation for corn (Zea mays L.) based on eco-physiological parameters

2011 ◽  
Vol 91 (11) ◽  
pp. 1998-2005 ◽  
Author(s):  
M Robiul Islam ◽  
Yuegao Hu ◽  
Sishuai Mao ◽  
Jinzhu Mao ◽  
A Egrinya Eneji ◽  
...  
Keyword(s):  
Zea Mays ◽  
Soil Water ◽  
Water Conservation ◽  
Zea Mays L ◽  
Water Saving ◽  
Physiological Parameters ◽  
Super Absorbent Polymer ◽  
Absorbent Polymer

scholarly journals Evaluation of effects of water-saving superabsorbent polymer on corn (Zea mays L.)yield and phosphorus fertilizer efficiency

2016 ◽  
Vol 40 ◽  
pp. 365-378 ◽  
Author(s):  
Adem GÜNEŞ ◽  
Nurgül KITIR ◽  
Metin TURAN ◽  
Erdal ELKOCA ◽  
Ertan YILDIRIM ◽  
...  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Water Saving ◽  
Fertilizer Efficiency ◽  
Superabsorbent Polymer ◽  
Phosphorus Fertilizer

Assessment of nitrification and urease inhibitors on nitrate leaching in corn (Zea mays L.)

2019 ◽  
Vol 99 (1) ◽  
pp. 80-91 ◽  
Author(s):  
Amy A. Pawlick ◽  
Claudia Wagner-Riddle ◽  
Gary W. Parkin ◽  
Aaron A. Berg
Keyword(s):  
Zea Mays ◽  
Soil Water ◽  
Management Practices ◽  
Zea Mays L ◽  
Root Zone ◽  
Fertilizer Application ◽  
Large Field ◽  
N Leaching ◽  
Urease Inhibitors ◽  
Eddy Covariance Method

Agricultural ecosystems are one of the largest global contributors to nitrate (NO3−) contamination of surface- and groundwater through fertilizer application. Improved fertilizer practices are needed to manage crop nutrient supply in corn (Zea mays L.) while minimizing impacts to clean water reserves. The goal of this study was to compare current nitrogen (N) fertilizer practices (urea at planting) with “packages” of improved management practices (a combination of right timing and product) that farmers potentially use. We conducted measurements in a continuous corn system from November 2015 to May 2017 at a large field scale (four 4 ha plots). Nitrate concentration was measured below the root zone and drainage estimated using a soil water budget approach in which evapotranspiration was measured using the eddy covariance method. The objective was to compare NO3−-N leaching from fields receiving urea vs. urea + combination of nitrification and urease inhibitors (NUI) fertilizer applications at planting, urea–ammonium nitrate (UAN) vs. UAN + NUI applied at sidedress, and a combination of these practices: urea + NUI at planting vs. UAN at sidedress. Drainage was only significant in the non-growing season. Neither fertilizer products applied with NUI at planting or sidedress proved to significantly reduce NO3−-N leaching. The combination of delaying fertilization to sidedress and applying UAN significantly reduced the soil water NO3−-N concentration compared with urea + NUI at planting (mean of 5.2 vs. 6.7 mg L−1) but only in 2015–2016. Based on these results, applying UAN at sidedress is recommended, although additional study years are needed to confirm those results.

scholarly journals Study on Water Saving Potential and Net Profit of Zea mays L.: The Role of Surface Mulching with Micro-Spray Irrigation

2020 ◽  
Vol 10 (1) ◽  
pp. 402
Author(s):  
Zhaoquan He ◽  
Xue Shang ◽  
Tonghui Zhang
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Organic Fertilizer ◽  
Significant Negative Correlation ◽  
Water Saving ◽  
Total Water ◽  
Maximum Increase ◽  
Economic Profit ◽  
Straw Mulching ◽  
Spray Irrigation

Water shortage threatens agricultural sustainability in Horqin Sandy Land, northeast China. To explore the effects of various surface mulching patterns with micro-spray irrigation on the yield, water consumption (ETc), and water-saving potential of maize (Zea mays L.), we used three treatments: straw mulching (JG), organic fertilizer mulching (NF), and no mulching (WG; control). In each treatment, plants were supplied with 500 mm of total water (irrigation plus precipitation) during the entire growing season and were irrigated with the amount of total water supply minus precipitation. Yield and water use efficiency (WUE) showed a significant negative correlation with water saving potential per unit yield (Py) and water saving potential per unit area (Sp), which were also consistent with their relationships in the function model. Meanwhile, a remarkably positive correlation occurred between yield, WUE, and net economic profit, respectively. The JG treatment, which was mainly affected by light and temperature production potential (Yc), grain yield, and ETc, showed the lowest Py (0.16 m3 kg−1) and Sp (2572.31 m3 hm−2), and the maximum increase in yield, WUE, and net economic profit, extending to 16,178.40 kg hm−2, 3.25 kg m−3, 17,610.09 yuan hm−2, respectively, which were significantly higher than those in NF and WG, (p <0.05). Thus, straw mulching with micro-spray irrigation was the best treatment for maximizing yield and WUE. Organic manure mulching and no mulching need further investigation, as these showed high Py and Sp, which were together responsible for lower WUE.

Effectiveness of Water-Saving Superabsorbent Polymer in Soil Water Conservation for Oat Based on Ecophysiological Parameters

2011 ◽  
Vol 42 (19) ◽  
pp. 2322-2333 ◽  
Author(s):  
M. Robiul Islam ◽  
Xuzhang Xue ◽  
Shao Li ◽  
Changzhong Ren ◽  
A. Egrinya Eneji ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Conservation ◽  
Water Saving ◽  
Superabsorbent Polymer

NET CO2 EXCHANGE RATE AS A SENSITIVE INDICATOR OF PLANT WATER STATUS IN CORN (Zea mays L.)

1988 ◽  
Vol 68 (3) ◽  
pp. 597-606 ◽  
Author(s):  
R. CEULEMANS ◽  
I. IMPENS ◽  
M. C. LAKER ◽  
F. M. G. VAN ASSCHE ◽  
R. MOTTRAM
Keyword(s):  
Zea Mays ◽  
Exchange Rate ◽  
Water Stress ◽  
Water Potential ◽  
Soil Water ◽  
Leaf Water Potential ◽  
Zea Mays L ◽  
Leaf Water ◽  
Water Capacity ◽  
Available Water Capacity

With the objective to evaluate and compare different physiological plant parameters as indicators of water stress, net CO2 exchange rate (NCER), leaf temperature, predawn and daytime leaf water potential were monitored diurnally on last fully expanded leaves of corn (Zea mays L.) plants under two different soil water treatments (stressed and nonstressed) during a 10-d period at anthesis in a semi-arid region in South Africa. Profile available water capacity (PAWC) was used to express the soil water contents during the experiments. A significant decrease in NCER was noticed as soon as 30% of PAWC was extracted, i.e. 2 or 3 d after irrigation. Although the results were limited to a short, well-defined measuring period, NCER, and especially NCER at noon, seemed to be a more sensitive and more reliable indicator of corn water stress than, for example, predawn or daytime leaf water potential, at least under the conditions studied here. This reduction in NCER might have a significant impact on total biomass, rooting density, flower and ear formation.Key words: Corn, irrigation scheduling, photosynthesis, leaf water potential, profile available water capacity, soil water content

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