Pages: 4-12

Abstract

A factorial experiment was conducted in the Ahwaz, in the form of a randomized complete block design with three replications on sunflower plant, in 2016 crop year. The experiment factors included the plant density per area (60000, 110000, and 160000 plants per a hectare) and leaf removal (without leaf removal, with ¼ leaf removal, with 2/4 leaf removal, and with ¾ leaf removal). The attributes studied were the weight of each seed, the seed yield, total biomass, the grain and oil harvest index, percentage, and oil yield. The effects of density were significant on most of the attributes except for the 1000-seed weight and oil percentage, however, the leaf removal treatment effects were only significant on the total biomass and the grain harvest index. The seed yield was significantly increased with the increase in density, as the lowest and the highest seed yield were observed in 60000 and 160000 plants per hectare density. Generally, it can be said that with the increase in the lower leaves of the plant, which are the biggest consumers, it can be cultivated in large densities and obtain a good yield, both in terms of quality and quantity.