جستجوی مقالات مرتبط با کلیدواژه « seed oil percent » در نشریات گروه « اکولوژی »

The present research was done in order to determine the optimum planting date, seed amount and to evaluate the grain and oil yields of spring rapeseed in saline and marginal areas around Urmia lake.

The RGS003 genotype was used for cultivation. The experiment was conducted as split plot based on a RCBD design in three replications with two factors including sowing date (30 March and 9 and 19 April) and seed amount (4, 6, 8 and 10 Kg seeds per hectare). The study was carried out in East Azarbaijan Agriculture and Natural Resources Research and Education Center (Khosrow Shah Station) during 2018 and 2019 cropping seasons.

The results indicated that the green field cover percent, Leaf chlorophyll index, plant height, pods per plant, 1000 seeds weight, grain oil percent and grain and oil yields were decreased significantly by delaying planting date from March 30 to April 19. Also this delay led to a significant decrease in grain and oil yields at all seed amounts. The highest amounts of grain and oil yields achieved from March 30 planting time and 6 Kg seeds per hectare. Correlations among the green field cover percent, Leaf chlorophyll in mid flowering stage with grain and oil yields were significantly positive. These indices had an important role in yield determining.

It is concluded that 30 March planting date and 6 Kg.ha-1 seeds amount can be suggested for spring rapeseed cultivation in saline and marginal areas around Urmia Lake and lands with similar climate.

The present research was done in order to determine the suitable planting date and seed rate and to evaluate the seed and oil yields and chlorophyll rate of spring oilseed rape in Tabriz plain climate (cold and semi-arid in the Copen climate classification system). The experiment was conducted as split plot based on a RCBD design in 3 replications with two factors including sowing date (30 March and 9 and 19 April) and seed rate (4, 6, 8 and 10 Kg seeds per hectare). The RGS003 as adapted and superior genotype was used for cultivation. The study was carried out in East Azarbaijan Agriculture and Natural Resources Research and Education Center (Khosrovshah station) during the 2018 year. The results indicated that plants in the 30 March planting date had significantly higher values of field ground cover percent, Leaf chlorophyll index, plant height, pods per plant, 1000 seeds weight, seed oil percent and seed and oil yields. Having sufficient time for growth and establishment, these plants produced higher yields via maximum use of environmental factors. Correlations among the field ground cover percent, Leaf chlorophyll, plant height indices, with each other and seed yield components (except seeds in pod), seed and oil yields were significantly positive. These indices had an important role in yield determining. Finally, the most seed and oil yields including 1673 and 694 Kg.ha-1 respectively, were achieved from 30 March planting date with 6 Kg.ha-1 seed rate for RGS003 as spring cultivar at Tabriz plain.