Einfluß von phosphatlösenden Bakterien und Phosphatdüngung auf die Phosphataufnahme von Erbsenpflanzen auf Kalkböden. In Gefäßversuchen im Gewächshaus wurde in Gegenwart und Abwesenheit von phosphatlösenden Bakterien (PDB) der Einfluß von Superphosphat und Thomasphosphat auf die Phosphataufnahme von Erbsenpflanzen aus einem Kalkboden untersucht. Durch Beimpfung mit PDB und/oder durch die Phosphatdüngung wurde die Phosphataufnahme der Erbsenpflanzen erhöht. Alleinige Anwendung von PDB, Superphosphat oder Thomasphosphat erhöhte die Phosphataufnahme um 14,3, 19,1 bzw. 6,7% gegenüber den ungedüngten Kontrollen. Durch Kombination von PDB mit Superphosphat bzw. Thomasphosphat erhöhte sich die Phosphataufnahme um 44,1% bzw. 30% gegenüber der Kontrolle.

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Sweet pepper plants (Capsicum annuum L.) grown worldwide in various distinct colours and shapes, and favors for consumers, especially those grown under protected houses. The attention of growers is directed toward enhancing or improving the growth, yield and quality of their fruits via safe agricultural practices using seaweed extract (SWE) as a biostimulant and plant growth regulators as the auxin IAA as safe alternatives for inorganic fertilization and their negative impacts. Therefore, two field experiments were carried out during two successive seasons of 2017 and 2018, to determine their influences on both vegetative and reproductive growth of sweet bell red pepper cv. 'Strick F1' grown under net house conditions. Treatments were consisted of two independent variables as foliar applicants such as seaweed extract (SWE) [Cytokan-S ] at four concentrations ( control, 500, 1000 and 2000 mg.l-1 ) in combination with five concentrations of indoleacetic acid (IAA) [control, 30, 60, 90 and 120 mg.l -1 ]. Control plants were sprayed with tap water. Pepper plants were sprayed with the assigned treatments twice, once at 15 days after transplanting, and the second one was 20 days later. Both conducted experiments were factorial experiments laid out in a randomized complete block design (RCBD), with three replicates. The obtained results showed that vegetative growth were affected significantly (p 0.05) due to the combination of SWE at either 1000 or 2000 mg/l × IAA at 120 mg/l; as number of leaves/plant, plant fresh and dry weights as compared to control plants. Respecting yield characters and its components, the interaction between both independent variables, exerted significant (p 0.05) effect on the various studied traits but without clear trends, except for fruit dry weights especially, wherein the interactions between control (SWE) 120 mg/l (IAA), and SWE at 500 mg IAA at 120 mg/l, gave rise to the highest average values during both seasons, in comparison to the interaction between control treatments of both variables; recorded, mostly, the least average values of the given traits. In terms of nutrient contents of fruits; N, P and K nutrient contents, the foliar application of the combination between SWE and IAA at 2000 and 120 mg/l, each in turn, significantly (p ;brought about the highest average values of nutrient contents of fruits compare to the other tested combinations. In brief, this investigation suggests that foliar application with combination of both SWE at 2000 mg / l and IAA at 120 mg / l twice after 15 and 20 days later of transplanting, is recommended to achieve the best vegetative and yield and quality of the given cultivar.

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Field experiments were conducted at the Faculty of Agriculture, (Saba-Basha) -Alexandria University, Egypt during winter growing seasons of 2017and 2018. Drip irrigation system was used in sandy soil to rate the irrigation water usage and increase its use efficiency, and then maximize Faba beans productivity under water deficit conditions. Four Egyptian Faba bean ecotypes and a commercial cultivar (Cleopatra) were grown under a drip irrigation system for evaluation under water deficit conditions. Four irrigation rate treatments were applied; i.e., 100%, 80%, 60%, and 40% of the ET0. The results revealed that the tested Faba bean genotypes differed among themselves in most of the studied traits, whether the vegetative characters, yield, and its component traits and pod characteristics. Most of the studied characters, especially the vegetative characters, leaves chlorophyll content and pods fresh yield/feddan trait were significantly affected by the irrigation rates. The obtained results showed that there was a significant decrease in the values of most of these characters by reducing irrigation rates from 3167 (100% of the ET0) down to 1267 m 3 / fed. (40% of the ET0) in the first season and from 3100 (100% of the ET0) down to 1240 m 3 /fed. (40% of the ET0) in the second season. The results showed that the Cleopatra cultivar was the best-tested genotype in terms of irrigation water use efficiency (IWUE). Also, the same cultivar was significantly superior to most of the tested Faba bean ecotypes in terms of growth vigor and productivity, even with irrigation water shortage, down to 2534 m 3 / fed. or 2480 m 3 / fed. during the first and second seasons (80% of the ET0), respectively. The results of this study showed that, under the conditions of this experiment, it is possible to rationalize irrigation water usage by 20.00% from the common irrigated treatment to reach the highest irrigation water use efficiency even with a decrease of yield, especially in semi-arid areas with limited water.