|Author:||Hegazi, H. H. ; Awad, A. M.|
|Book Group Author:||NA|
The results of two successive field experiments which were conducted at the Agricultural Experimental Station Farm at 'Ali Moubarak' village, 'El-Nubaria' region, Egypt, during 1999 and 2000 winter seasons, showed that effects of the irrigation water quantities (904 and 1205 m3 fed-1), N fertilizer treatments (N1, N2, N3 and N4) and biofertilizer inoculation types (control, yeast, Bacillus and yeast + Bacillus) on the plant height, number of main stems plant-1, leaf area plant-1, tuber yields plant-1 or fed-1, average fresh tuber weight, percent of different tuber sizes, fresh and dry tuber weights for each grade were significant. Increasing irrigation water quantities from 904 and 1205 m3 fed-1 (75-100% ETp) reduced plant height, number of main stems plant-1, average tuber weight, percent of large tuber of the harvested yield, fresh and dry tuber weight/grade and water use efficiency (WUE) and increased leaf area plant-1 as well as water consumption use (WCU). The mixed inoculations (yeast; Saccharomyces cereivisae+Bacillus; Bacillus polymyxa [Paenibacillus polymyxa]) gave higher significant increases for plant height (22.2 and 22.0%), number of main stems plant-1 (29.3 and 27.5%), leaf area plant-1 (49.5 and 39.1%), saved the consumptive water by 15.3 and 12.1% and increased the water use efficiencies by 97 and 104.9% in the two studied seasons, respectively, compared with un-inoculated treatments. Generally, the results showed that the combined treatments of low water quantities (904 m3 fed-1) + N3 (120 kg N-urea (46%) fed-1) and mixed inoculations with yeast and Bacillus can be considered the best combination which produced the highest values of plant height, number of main stems plant-1, fresh tuber weight, tuber yields plant-1 or fed-1, the different grades proportional of the harvested yield, fresh and dry tuber weights for each grade. At low irrigation water quantity (904 m3 fed-1), application of N1 (120 kg N-urea fed-1) and mixed inoculation (yeast + Bacillus) were remarkable and significantly associated with saving more water (21.1 and 14.9%) and high water use efficiencies (23.18 and 21.95 kg fresh tuber/m3 consumed water) in 1999/2000, while N2 (150 kg N-urea fed-1) saved approximately 19.2% in 2000/2001 winter season.
|Pages:||89 - 105|
|Journal:||Alexandria Journal of Agricultural Research|
application rates, crop quality, crop yield, fertigation,nitrogen fertilizers, plant height, plant water relations, potatoes,stems, trickle irrigation, water use efficiency, weight, Egypt,Bacillus, Paenibacillus polymyxa, Saccharomyces cerevisiae, Solanumtuberosum, Bacillaceae, Firmicutes, bacteria, prokaryotes,Paenibacillus, Paenibacillaceae, Saccharomyces, Endomycetales,Ascomycotina, Eumycota, fungi, eukaryotes, Solanum, Solanaceae,Solanales, dicotyledons, angiosperms, Spermatophyta, plants, NorthAfrica, Africa, Mediterranean Region, Middle East, Developing Countries,biofertilizers, fertirrigation, Saccharomycetaceae, Field Crops (FF005)(New March 2000), Plant Water Relations (FF062), Plant Production(FF100), Soil Biology (JJ100), Fertilizers and other Amendments (JJ700),Soil Water Management (Irrigation and Drainage) (JJ800) (Revised June2002) [formerly Soil Water Management]