تأثير السماد العضوي و البوتاسيوم في النمو الخضري و الحاصل لنبات الطماطة Lycopersicon esculentum Mill في ظروف محمية غير مدفأة و تربة رملية

Abstract EN

An experiment was conducted in Kufa Technical Institute on tomato plant (Dombito hybrid ) during the season of 2011/2012 in unheated plastic houses in sandy soil This study included (16) treatments this come from four levels of Humat potassium (pow humus) as a source of Humat (85 %) with 4 level of (0, 30, 60 and 90) g / m 2, and four levels of potassium nitrate at (0, 20, 40 and 60) kg / D, using potassium nitrate (KNO3) (46.6%).

Each of potassium nitrate and potassium Humat ware added at four intervals their to study their effects on vegetative growth and yield parameters.

The experiment was adopted according to split_Plot Design the with three replicates and the means were compared according to Duncan's Multiple Range Test at the probability level of 0.0 5 .

Results showed superiority of all treatment belong to (Humat potassium ((T, and all treatment of potassium addition A) in comparison, to control treatment in both vegetative growth and fruiting parameter and also their interactions of (TxA) significantly affected the above parameters compared to control treatment for the four picking (3, 6 , 9 , 12 ) The highest value for vegetative traits, number of leaves / plant, leaf area (cm 2,) were obtained from the addition of 90 g / m 2 Humat potassium interacted with 60 kg / D of potassium)) .

The addition of it was respectively to recipes as aforesaid, (59.25) and leaves / plants, (2988) cm 2, / plant, while, the 9th and 12th picking showed significant superiority in the most vegetative parameters , that achieved the highest values compared to the 3rd and 6th pickings Results also showed , that the highest early, yield and the highest yield / kg / produced, the highest weight of the fruit / g, and plant yield / kg, the highest number of fruits / plant were resulted from the addition of 60 g / m 2 Humat Potassium with 40 kg / D / potassium) which gave (6.73 (kg / treatment, (243.5) kg), (302.4) / g / of fruit, (8.43) kg / plant, (32.89) fruit / plant, respective compared to the treatment of (t1a1) which gave the lowest values for the above-mentioned parameters ,that obtained .for the sixth and ninth pickings compared to the 3rd and 12th pickings.