A field experiment was conducted during the two successive seasons of 2012/2013 and 2013/2014 to study the effect of compost/NPK and biofertilization treatments on vegetative growth, yield and herb NPK % of fennel plants.Obtained results revealed that the best vegetative growth characters (plant height, stem diameter, number of main branches and herb dry weight), yield parameters (number of umbels and fruit yield per plant and per fed) and herb % of NP and K values were obtained due to the use of the full dose of mineral NPK, ¼ compost + ¾ NPK dose or ½ compost + ½ NPK dose with no significant differences being detected between such three fertilization treatments. Concerning biofertilization treatments, all of the prementioned growth, yield and chemical traits were considerably augmented due to the dual treatment (Minia Azotein + phosphorein) followed by Minia Azotein, while phosphorein gave the least values. In regard to the interaction gave between the, two involved factors, the highest growth, yield and chemical composition values were given by fertilizing fennel plants with the full dose of mineral NPK, ¼ compost + ¾ NPK or ½ compost + ½ NPK in combination with dual biofertilizer treatments (Minia Azotein + phosphorein).There for, it could be advised from the economical and environmental point of view, to supply fennel plants with the treatment of ½ compost + ½ NPK dose in combination with both Minia Azotein plus phosphorein in order to obtain the best fruit yield of fennel plants.
Two field experiments were conducted to investigate the effect of plant compost (0, 2.5, 5.0 and 7.5 ton/fed) and six natural stimulants (green tea extract at 5 g/l, moringa leaves extract at 300 mg/l, garlic extract at 300 mg/l, licorice roots extract at 5 g/l, active dry yeast at 5 g/l and seaweeds extract at 3 cm 3 /l) on corms production and chemical constituents of Gladiolus grandiflorus cv. Peter Pears. The obtained results indicated that corm diameter, number of cormels/plant, dry weight of cormels, as well as, chemical constituents including chlorophyll a, b, carotenoids and percentages of N, P and K in the corms were gradually increased by increasing the level of compost. Significant differences were detected among the four used treatments. So, the high level of compost resulted the highest values. All six treatments of natural stimulants significantly increased corm and cormels production and their content of chemical constituents in comparison of the control plants. The highest values were obtained due to the treatments of seaweeds extract at 3 cm 3 /l. or active dry yeast at 5 g/l. The interaction between compost and natural stimulants was significant for all previous characters, except chlorophyll a in the first season.
The aim of this study was to figure out the effect of organic fertilization and natural stimulants, as well as, their interaction on vegetative growth, flowering aspects of Gladiolus grandiflorus cv. Peter Pears plants. Results showed that vegetative growth (leaf length, number of leaves/plant and dry weight of leaves/plant) and flowering aspects (length of spike, number of florets/spike and lower floret diameter) were gradually increased by increasing the level of compost fertilizer. All natural stimulant treatments significantly increased all vegetative growth characters and flowering parameters in comparison with the control. Seaweeds extract at 3 cm 3 /l or active dry yeast at 5 g/l seemed to be more effective than other treatments in this concern. The use of high level of compost (7.5 ton/fed) in combination with seaweeds extract at 3 cm 3 /l or active dry yeast at 5 g/l noticeably improved the different vegetative growth characters and flowering parameters of gladiolus.
to study the effect of mineral NPK and organic fertilization on growth, yield, essential oil and herb N, P and K % of Coriandrum sativum, L. plants. The obtained results revealed that all studied characters of growth, yield, essential oil and herb % of NPK were significantly augmented due to the use of both low and high NPK fertilization rates with the high one giving the highest values. Concerning organic fertilization, the different growth traits (plant height, stem diameter and herb dry weight), yield and yield component characters (number of umbels/plant and fruit yield per plant and per fed), essential oil parameters (percent and yield per plant and per fed) and NPK % in the herb were gradually increased parallel to the gradual increase in compost level. The combined treatment between the low NPK rate (50 g kristalon/10.8 m 2 plot)and medium compost level (10 ton/fed) resulted in better fruit and essential oil yield than that obtained from the high NPK rate. So, the possibility of substituting one half of the mineral NPK dose by the medium compost level is justified.
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