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The current study was carried out at Agricultural College, University of Baghdad in the vegetable farm, Department of Horticulture during 2013 spring growing season. Yield response to irrigation of different crops is of major importance in production planning where water resources are limited. This study aims to determine the effect of different irrigation treatment （deficit irrigation） and potassium humate fertilizer on yield, content of nitrogen, potassium, and phosphor in tuber of potato and water use efficiency in the Abu-Graib Region, Iraq. Potato was grown under drip irrigation with three treatments： irrigation applied when evaporation 75%, 100% and 125% from pan A, and three potassium humate fertilizers： 0, 1.2 and 2.4 kg/ha with three times additions. The seasonal potato evapotranspiration ranged from 267 mm to 372 mm. The drip irrigation treatment had significant effecting tuber yield of potato recorder 29,530, 27,630 and 24,880 kg/ha for 125%, 100% and 75% from pan A evapotranspiration, respectively. Humus fertilizers addition has the lowest value of ETa 309 mm and maximum value of yield 2,930 kg/ha. Water use efficiency （WUE） and irrigation water use efficiency （IWUE） values increased with increasing humus fertilizers, recording 9.92, 14.52, 8.59, 12.42 and 7.51, 10.70 kg/m3 for potassium humate K3 （2.4 kg/ha）, K2 （1.2 kg/ha） and KI （0.0 kg/ha）, respectively. Plants irrigated with 125% from class pans A evaporation, produced a significant increase in N, P and K content in tubers recorder 0.96%, 0.58% and 1.52%, respectively. Potassium humus-fertilizer significant differences among K1, K2 and K3 on high of plants reached 41.52, 50.08 and 56.39 cm, respectively, number of stems/plant 2.69, 3.22 and 3.78, respectively, leaves area index recorder 2.80, 3.35 and 3.73. 相似文献
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Badr M. Thamer Mohamed H. El-Newehy Nasser A. M. Barakat Salem S. Al-Deyab Hak Yong Kim 《Fibers and Polymers》2017,18(4):696-705
In this study, we developed new method to prepare one-pot current collector/electrode plate to be utilized in the fuel cell technology. In situ preparation of zero-valent N-doped Co carbon nanofibers (Co/N-CNFs) as an immobilized thin film onto graphite disc was achieved by electrospinning technique, followed by calcination at 1100 oC in argon atmosphere. This catalyst was used for methanol electrooxidation in alkaline media. The effects of nitrogen doping and immobilization on the activity and stability of the prepared catalysts were studied using cyclic voltammetry and chronoamperometry, respectively. SEM, TEM, EDX, XRD, and TGA were used to characterize the morphology and composition of Co/N-CNFs catalysts. The results showed that the electrocatalytic activity as well as the stability of Co/N-CNFs towards methanol electrooxidation in alkaline media were significantly affected by both nitrogen doping and immobilization of the catalyst on the graphite disc. Moreover, the methanol concentration has also affected the electrocatalytic activity of Co/N-CNFs-supported immobilized onto graphite disc and Co/N-CNFs-unsupported graphite disc. 相似文献
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