جستجوی مقالات مرتبط با کلیدواژه « Oil percentage » در نشریات گروه « منابع طبیعی »

Nutrient management plays an essential role in canola grain production. Nitrogen is essential for crop growth and yield, so nitrogen deficiency is a significant crop production limiting factor. Mycorrhizal fungi have symbiotic relationships with the roots of most crops, enhancing the growth and yield of host plants by enhancing their ability to absorb water and nutrients and resist disease. Humic acid can increase enzymes and proteins by enhancing a plant's ability to absorb nitrogen, thereby enhancing plant growth and yield. This study aimed to examine the substitution and reduction of chemical fertilizer application with mycorrhiza fertilizer and foliar application of humic acid. This study was conducted in split-split plots arranged in a randomized complete block design with three replications in 2019-2020. Experimental treatments included three levels of nitrogen fertilizer (0, 50, and 100 kg ha-1 nitrogen from urea) as the main factors and mycorrhizal inoculation and foliar application of humic acid (use and non-use) as sub-factors. Each experimental plot comprised six planting lines with a distance of 40 cm. Each replication consisted of 12 plots, with a distance of 2m between replicates and 1 m between treatments. Mycorrhiza fertilizer contained 100 active fungal organs per gram and three species: Funneliformis mosseae, Glomus etunicatum, and Rhizophagus irregularis. A manual sprayer was used to apply 2 liters of Humic acid per hectare at the beginning of the stem and at the time of flowering (50% flowering of rapeseed). The co-treatment with 100 kg ha-1 nitrogen fertilizer and mycorrhizal inoculation and non-inoculation treatments yielded the highest grain yield at 3838.4 kg ha-1 and 3551.7 kg ha-1, respectively, an increase of 72% and 59% over the control and non-inoculation treatments. The highest seed oil content was observed in the 100 kg ha-1 and 50 kg ha-1 nitrogen fertilizer treatments, with increases of 12.5% and 11.3% over the control treatment. The application of 100 kg/ha of nitrogen with mycorrhiza and spraying with humic acid resulted in the highest grain protein at 20.44 and 19.4%, with increases of 34.7% and 27.9%, respectively, compared to not applying nitrogen fertilizer, mycorrhiza, and humic acid. The treatment with 100 kg ha-1 of nitrogen fertilizer and mycorrhiza inoculation produced the highest grain phosphorus at 0.58%, while the treatment with no nitrogen fertilizer and no mycorrhiza inoculation produced the lowest grain phosphorus at 48.7%. The results demonstrated that there was a significant difference between the levels of nitrogen fertilizer. However, grain yield is improved with the application of nitrogen and mycorrhizal fertilizers together. Compared to nitrogen fertilizer and mycorrhiza treatments, humic acid did not result in a statistically significant increase in the studied traits. It is recommended, however, that this test be evaluated for a number of years in other regions. Overall, the simultaneous application of 50 kg ha-1 of nitrogen and mycorrhizal inoculation seemed acceptable for canola yield. Although in this study, 100 kg ha-1 of nitrogen fertilizer produced the highest yield, reducing the use of chemical fertilizers and increasing the use of mycorrhiza fertilizers reduces costs and environmental damage.

The aim of this study was to investigate the effect of mycorrhiza and phosphorus fertilizer on fruit traits of three almond cultivars of ‘Shahrood 12’, ‘Tonu’ and ‘Supernova’ in a split-split plot experiment base on a randomized complete block design with 54 almond trees and three replications. This research was conducted in Eghlid city during 2016 growth season. Nutrient treatments were included three levels of diammonium phosphate (0, 250 and 500 g/tree) and two levels of mycorrhiza (0 and 500 g/tree). Maximum number of flowers was achieved by using mycorrhiza, in ‘Shahroud 12’ cultivars. The highest number of remained fruit (74), fruit width (1/6 cm) and length (3/7cm), weight of the 100 kernels (450g), leaf phosphorus (0/46%) and oil percent (47%) were observed in ‘Superunova’ by using 500 g diammonium phosphate and 500 g mycorrhiza. Mycorrhiza and phosphate fertilizer significantly enhanced vegetative growth traits such as leaf area, fruit length and width, fruit weight and kernel to skin ratio. The leaf phosphorus concentration and oil percentage of the kernel were increased significantly in response to both fertilization treatments. Based on the results of this research, ‘Superunova’ is considered as a superior cultivar and the most suitable fertilizer for a 10-year-old almond tree under rainfed condition was 500 g diammonium phosphate and 500 g mycorrhiza.

In order to explore the effect of chemical and Nano bio-fertilizer on quality and quantity of sesame genotypes, an experiment was conducted in a completely randomized block design with three replications at Agricultural Research Institute of Zabol University in 2014-2015 growing season. Treatments included three sesame genotypes (Ardakan, Isfahan and Sistan landrace) as main plot and fertilizer type included 100% of recommended chemical fertilizer, 75% of recommended chemical fertilizer + 1.5 kg.ha-1 of nano bio-fertilizer, 50% of recommended chemical fertilizer + 1.5 kg.ha-1 of nano bio-fertilizer, 25% of recommended chemical fertilizer+ 1.5 kg.ha-1 of nano bio-fertilizer and 1.5 kg.ha-1 of nano bio-fertilizer as subplots. The results showed that using 100% of recommended chemical fertilizer caused significant increase in plant height, number of capsule per square meter, thousand seed weight, seed yield, and biomass. The highest of capsule number per square meter (2256 number) was obtained from Sistan landrace with the application of 100% of recommended chemical fertilizer. The number of capsule per square meter, number of seeds per capsule, thousand seed weight, seed yield, biomass, harvest index, chlorophyll index and protein percentage showed significant increase in Sistan landrace in comparison with the other genotypes. The results showed that the highest seed yield was obtained (1428.07 kg.h-1) from Sistan landrace and the highest oil percentage (41.7%) was obtained from Isfahan genotype. According to the results, it could be said that the 100 kg.ha-1 of potassium sulfate, ammonium phosphate and urea application can be beneficial in increasing yield and improving growth characteristics of sesame.