Bøger af Alireza Saberi

Zur Bestimmung der Keimleistung wurden die Samen in Petrischalen gekeimt, die mit Filterpapier ausgekleidet, mit destilliertem Wasser oder mit NaCl-Konzentrationen von 5, 10 und 15 dS m & supmin; ¹ angefeuchtet waren. mit zunehmendem Salzgehalt und bei 15 dS m & supmin; ¹ betrug die prozentuale Verringerung gegenüber der Kontrolle 32,7%. Die Samenkeimung von KFS4 war höher als die von Speedfeed. In den Feldversuchen wurden zwei Sorten von Futtersorghum 2 Jahre lang im Regenschutz unter Salzgehalten von 0, 5, 10, 15 dS m & supmin; ¹ gezüchtet und bewässert, wenn das Blattwasserpotential -1, -1,5 und -2 erreichte MPa. Eine Zunahme der Salzkonzentrationen und des Wasserstresses führte dazu, dass Futtersorghumpflanzen verkümmert wurden. Die Bewässerung kann unter Salzgehalt intensiviert werden, um die Auswirkungen auf das Pflanzenwachstum abzuschwächen. Der kritische Salzgehalt von KFS4- und Speedfeed-Sorten betrug 15 dS m-1 bzw. 10 dS m-1. Unter nicht salzhaltigen Bedingungen unter Wassereinschränkung kann Futtersorghum selten (-2 MPa) gewässert werden, um einen hohen WUE zu erzielen. Andererseits deuten die Auswirkungen darauf hin, dass die Bewässerung des Futtersorghums zur Wassereinsparung um etwa zwei Wochen verzögert werden kann, bis das Blattwasserpotential -1,5 MPa erreicht.

Para determinar o desempenho germinativo, as sementes foram germinadas em placas de Petri forradas com papel filtro, umedecidas com água destilada ou nas concentrações de NaCl de 5, 10 e 15 dS m-1. com o aumento da salinidade e a 15 dS m-1 a redução percentual do controle foi de 32,7%. A germinação de sementes de KFS4 foi maior do que Speedfeed. Nos experimentos de campo, duas variedades de sorgo forrageiro foram cultivadas em abrigo de chuva por 2 anos sob níveis de salinidade de 0, 5, 10, 15 dS m-1 e irrigadas quando o potencial hídrico foliar atingiu -1, -1,5 e -2 MPa. O aumento nas concentrações de sal e o estresse hídrico causaram o atrofiamento das plantas forrageiras de sorgo. A irrigação pode ser intensificada sob salinidade para mitigar os efeitos no crescimento das plantas. O nível crítico de salinidade das cultivares KFS4 e Speedfeed foram 15 dS m-1 10 dS m-1, respectivamente. Em condições não salinas sob limitação de água, o sorgo forrageiro pode ser regado com pouca frequência (-2MPa) para obter uma alta WUE. Por outro lado, os efeitos da interação sugerem que, para economizar água, a irrigação do sorgo forrageiro pode ser retardada por cerca de duas semanas até que o potencial hídrico foliar atinja -1,5 Mpa.

In order to find essential information for efficiency management of sorghum and corn fields in sole cropping and intercropping patterns should be conduct experiment at the field condition. The quantity performance of intercropping of forage sorghum with soybean and green bean were studied through factorial experiment. The treatment of two rows sorghum + one row green bean had a highest land equivalency ratio (LER= 1.6). This means that the performance of intercropping is 60% more than single cropping. The other experiment also showed; double - row planting arrangement of on one double - row rebased a row maize and another row soybean with 65000 plant per hectare corn and 475000 plant per hectare soy bean is the best choice for forage production. It was conclude that by using double planting pattern with changing arrangement and density the most yield obtained.

To determine the germination performance seed were germinated in Petri dishes lined with filter paper, moistened with distilled water or with NaCl concentrations of 5, 10 and 15 dS m-1. with increasing salinity and at 15 dS m-1 the percentage reduction from control was 32.7%. Seed germination of KFS4 was higher than Speedfeed. In the field experiments, two varieties of forage sorghum were grown in the rain shelter for 2 years under salinity levels of 0, 5, 10, 15 dS m-1 and irrigated when the leaf water potential reached -1, -1.5 and -2 MPa.Increase in salt concentrations and water stress caused forage sorghum plants to be stunted. Irrigation may be intensified under salinity to mitigate the effects on plant growth. The critical salinity level of KFS4 and Speedfeed cultivars were 15 dS m-1 10 dS m-1, respectively. In non-saline conditions under water limitation, forage sorghum can be watered infrequently (-2MPa) to get high WUE. On the other hand interaction, effects suggest that, in order to save water, the irrigation of the forage sorghums can be delayed for about two weeks till leaf water potential reaches -1.5 Mpa.