Showing 2 results for Macro and Micro-Nutrients
Gh. Saeidi,
Volume 11, Issue 1 (4-2007)
Abstract
Sunflower (Helianthus annuus L.) can have an important role in vegetable oil production. Also, appropriate soil fertility is necessary to obtaine higher seed yield and quality of the crop. This experiment was conducted to investigate the effect of fertilizer treatments of macro and micronutrients on seed yield and other agronomic traits in sunflower. The effects of thirteen fertilizer treatemts (as main factor) were investigated on agronomoic traits of two hybrid cultivars, "HiSun33" and "Euroflor" (as sub factor) in a randomized complete block design with three replications. The results showed that there was significant interaction between fertilizer treatments and cultivars for most of the traits and the effects of fertilizer treatments were dependent on the cultivar. Almost all of the fertilizer treatments of N, P, K, Fe, Zn and Mn either significantly or non-significantly decreased the means of head diameter, 1000-seed weight, seed yield/plant, seed yield and oil yield in Euroflor cultivar however, in HiSun33 cultivar, each of N, P, and K fertilizers had no significant effect on seed yield. Application of Zn and Mn fertilizer in soil or spraying them on plants had no significant effect on seed yield and yield components in HiSun33 cultivar however, application of Fe feritilizer (Sequestrene) significantly increased the seed yield of this cultivar and had no significant effect on its seed oil. In HiSun33, seed yield and oil content for treatments of control, NPK and NPK+Fe were 4946, 5155 and 7090 kg/ha and 40.72, 43.10 and 43.07 %, respectively. The effects of fertilizer treatments on oil concentration of seed were not significant, thus the variation of oil yield was due to the seed yield. The correlation coefficients and regression analysis showed that seed weight and head diameter were most important seed yield components,. In general, it seems that in a soil conditions like that of this experiment, Fe fertilizer can increase seed and oil yield in HiSun33 cultivar.
G. Saeidi,
Volume 12, Issue 45 (10-2008)
Abstract
This study was conducted to investigate the effects of thirteen fertilizer treatments (as main factor) on agronomic traits of two local cultivars (as sub factors) of sesame (Sesamum indicum L.), "Mobarakeh" and "Ardestan" in Isfahan by using a randomized complete block design with three replications. The results showed that applying fertilizer treatments of N, P, K, Fe, Zn and Mn had no significant effects on yield components, seed yield and oil yield. However, comparing the control treatment, simultaneous application of all fertilizers significantly reduced days to maturity. Significant interaction between cultivars and fertilizer treatments was observed for seed oil content, as application of N, P, NPK and NPK+Fe+Zn in Mobarakeh and application of N+K in Ardestan reduced seed oil content. However, the other fertilizer treatments had no significant effects on this trait. The Mobarakeh cultivar compared to Ardestan had significantly higher plant height, higher seeds per capsule, lower 1000-seed weight, higher seed yield per plant and per hectare and higher oil yield. Seed yield for Mobarakeh and Ardestan cultivars were 1646 and 1169 kg/ha and their seed oil contents were 52.88% and 53.81%, respectively. The correlation coefficients and regression analysis showed that the variation of seed yield was mostly due to the number of capsules per plant and seeds per capsules, thus these two traits were the most important yield components. Oil yield had a very high correlation coefficient with seed yield (r=0.99**), whereas its correlation with seed oil content was very low (r = -0.10ns). Therefore, it seems that seed yield was the main cause of higher oil yield.
