|Author:||Alderfasi, A. A.|
|Book Group Author:||NA|
Approximately two third of Arab Countries are in arid and semi-arid regions. Sever climatic of arid and semi-arid environment strongly affects cereal yield. Plant grown and plant water status response to soil water deficit play an important role in drought tolerance and yield stability. In order to investigate, the relationship between grain yield of wheat under various K application and different water stress, the present study was carried out in sandy loam soil during two successive seasons of 2004/2005, 2005/2006, in Agriculture Research Station, Faculty of Food and Agriculture sciences, King Saud University, near Riyadh. The experiments included the combination comprising of 2 wheat genotypes, (Yecora Rojo and Line L95-2) and three irrigation schedules (50 mm. of water in each irrigation at 50, 100 and 150 mm of cumulative pan evaporation, CPE) and four rates of potassium fertilizers (0, 100, 200 and 300 kg K2O/ha.). The aim of the study was to assess the potentiality of bread wheat genotypes under water stress condition in the presence of different rates of potassium fertilizers. Pre-harvest time data on number of days to filling and maturity stages and plant height were recorded whereas, at harvest time grain yield and yield component characters viz., spike length, number of grains/spike, grain weight/spike and 1000 - grain weight were also recorded. Data concerning harvest index and water use efficiency were included. Results demonstrated that increasing rates of K application up to 200 kg K2O/ha significantly increased grain yield and most of yield component characters, while further increase of K caused a decrease in most of yield component characters and consequently decreased grain yield. Results also obvious that, much of water used can be saved by reducing the amount of water irrigation with slight decreased in grain yield. Data concerning genotypes showed nearly the same effect on most studied parameters without any significant differences between them. Finally, data obtained summarized the importance of supplying potassium fertilizers and useful of CPE technique for scheduling irrigation besides selecting the most adapted variety in planning sustainable agriculture in arid and semi-arid regions.
|Pages:||221 - 227|
|Journal:||World Journal of Agricultural Sciences|
agricultural research, climate, crop production, crop yield,drought, drought resistance, fertilizers, filling, genotypes, growth,harvest index, irrigation, plant height, plant physiology, potassium,potassium fertilizers, sandy loam soils, semiarid zones, soil, soilwater, stress, sustainability, use efficiency, water deficit, waterstress, water use, water use efficiency, wheat, yield components,yields, Arab Countries, Saudi Arabia, Pan, Triticum, Triticum aestivum,countries, Triticum, Poaceae, Cyperales, monocotyledons, angiosperms,Spermatophyta, plants, eukaryotes, Pongidae, Primates, mammals,vertebrates, Chordata, animals, West Asia, Asia, Middle East, DevelopingCountries, drought tolerance, potash fertilizers, soil moisture,watering, Research (AA500), Meteorology and Climate (PP500), PlantProduction (FF100), Natural Disasters (PP800), Environmental Toleranceof Plants (FF900), Plant Water Relations (FF062), Fertilizers and otherAmendments (JJ700), Plant Breeding and Gen