Abstract
A field experiment was conducted at the fields of Agriculture College , Anbar University, (alternative site Abu Ghraib) during spring and fall seasons of 2017, to study the effect of soil and foliar application of potassium (140 kg.ha-1, 500, 1000 and 1500 mg-L-1) on growth and yield of three varieties of sorghum (Lelo, Inkath and Ishtar), The experiment was carried out according to the design of (R.C.B.D) and in order of the split arrangement with three replicates. Results shows, the cultivar Ishtar was superior in most studied characters such as plant height and leaf area 148.67, 152.25 cm, 5210, 4767 cm2.plant-1, in two seasons, respectively. The same cultivar gave the lowest number of days (from planting to 100% flowering), also it gave highest grain yield and highest harvest index which was 81.83 days and 4.93 ton.ha-1 and 25.15% respectively in spring season only. While the two varieties Lelo and Ishtar gave the lowest content of proline leaves (2.11 and 0.18 mg.gm-1) in spring and fall seasons respectively. The highest concentration of potassium (1000mg L-1) was superior in plant height, leaf area and grain yield (150.89, 155.78 cm, 5075, 4812 cm2 plant -1, 5.56, and 8.32 ton.ha-1) in two seasons respectively.
Highlights
INTRODUCTIONThe search for the appropriate variety of these conditions has the greatest role, as the varieties vary in their responsiveness and adaptation to these conditions
A number of researchers (4,7,15,22,25 and 26) indicated that varieties of sorghum differed significantly among them in many growth characteristics, such as the number of days of planting to 100% flowering, plant height, and leaf area, (10, 20 and 22) show that sorghum varieties differ in the grain yield and harvest index. several researchers (24) showed that the content of the leaves proline differed among sorghum varieties
(27) indicated that the harvest index is treatments, varieties and potassium increased by increasing the grain yield
Summary
The search for the appropriate variety of these conditions has the greatest role, as the varieties vary in their responsiveness and adaptation to these conditions In this context, a number of researchers (4,7,15,22,25 and 26) indicated that varieties of sorghum differed significantly among them in many growth characteristics, such as the number of days of planting to 100% flowering, plant height, and leaf area, (10, 20 and 22) show that sorghum varieties differ in the grain yield and harvest index. Mahdi (21) and Mohammed (22) they found that spraying high concentrations of potassium led to improve many growth characteristics of the sorghum plants and maize as the number of days from planting to 75% flowering and plant height and leaf area and harvest index.
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