Effect of plant density and potassium consumption on the quantitative and qualitative yield in Sunflower ( Helianthus annus L. ) var. Hayson

Subject Areas : crop production

هدي جمالي ¹

1 - - دانش آموخته كارشناسي ارشد، گروه زراعت ، واحد قائم‌شهر، دانشگاه آزاد اسلامي، قائم شهر – ايران

Received: 2011-09-07 Accepted : 2024-04-13 Published : 2015-10-07

Keywords: sunflower , density , potassium , yield components , seed yield , protein and oil,

Abstract :

In order to study the effect of plant density on quantitative and qualitative yield of sunflower var. Hayson, a field experiment was conducted as a randomized complete block design with four replications in Agricultural and Natural Resources Research in Mazandaran province ( Sari – Dashte Naz ) in crop year of 2009. In this experiment, four density levels 55, 63, 83, 111 thousand plants per hectare ) were considered as the main factor and three levels of potassium as ( 0, 50, 100kg per hectare ) as the sub factor. Analysis of variance showed that the density had significant effect on seed protein and the percentage of oil, but the number of rows of seeds, the number of filled seeds and seed yield were not significantly affected by the density. The results showed that the density of 83 thousand plants per hectare with 100kg potassium fertilizer had the greatest impact on increasing of the number of rows of sees, number of filled grain and seed yield. Density and potassium levels did not have significant effect on seed protein but the greatest oil percentage belonged to 83 thousand plants per hectare. On the basis of results, it is defined that increasing density on the optimum level, caused to increase yield components, oil percentage and seed yield.

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