جستجوی مقالات مرتبط با کلیدواژه "quantitative characteristics" در نشریات گروه "زراعت"

The effect of foliar application of zinc sulfate and seaweed on qualitative and quantitative characteristics of local Kermanshah cantaloupe (Cucumis melo L., Cantalupensis Group) cv. Kalak was investigated. After sowing seeds in the field, the plants were sprayed in three stages including the 4-6 leaf stage, flowering and after the fruit set. The experiment had a factorial design based on the randomized complete block design with 9 treatments including various concentrations of zinc sulfate (0.5 and 1 g L-1) and seaweed (0.5 and 1 g L-1) and was repeated three times. The results of analysis of variance showed that zinc sulfate at 0.5 g L-1 and seaweed at 1 g L-1 had significant effects on the weight, length and diameter of the fruit, the weight of the fresh fruit, fresh and dry weight of the plant, and fruit firmness. The highest amount of vitamin C was observed in zinc sulfate at 1 g L-1 and seaweed at 0.5 g L-1. The highest total seed weight was obtained in zinc sulfate at 0.5 g L-1 and seaweed at 1 g L-1. Foliar application of zinc sulfate and seaweed did not have a significant effect on total soluble solids (TSS). However, zinc sulfate at 0.5 g L-1 increased the amount of titratable acid (TA) in the fruit juice. The highest amount of the TSS/TA ratio of the fruits was observed in application of seaweed at 1 g L-1. Overall, the findings of the present study indicated that simultaneous application of zinc sulfate and low concentrations of seaweed extract has a significant effect on many qualitative and quantitative characteristics of “Kalak” Cantaloupe and can be recommended as a biofertilizer.

In this study, the effect of water salinity accompanied by organic and inorganic fertilizer was examined on the growth, quantitative characteristics and photosynthetic pigments in borage plants. The experimental was split plot based on complete block design with three replicates. Treatments were two irrigation sources: irrigation with fresh and saline water (EC: 4.18 dS m-1) as the main plots, and four fertilization systems: application of NPK at 80:40:30 kg ha-1, 40 t ha-1 of manure, NPK at 40:20:15 kg ha-1 plus 20 ton of manure ha-1 and no soil fertility as sub-plot. The experiment was conducted in 2012 at the Zabol University Research Farm, Zabol, Iran. The results showed that irrigation with saline water significantly reduced plant height, flowering stem height, inflorescence height, number of flowers per inflorescence, number of branches, content of chlorophyll and carotenoid. Application of fertilizer significantly increased all studied traits compared with the control. Combination of organic and inorganic fertilizer was more effective than sole application and increased inflorescence height, number of lateral branches, number of flowers per inflorescence, chlorophyll a, total chlorophyll and carotenoids by 19.4, 30.9, 31.5, 25.6, 24.8 and 25.3 percent over control, respectively. Interaction of water quality and fertilization was significant on plant height, inflorescence height, chlorophyll b, plant dry weight and flowering shoot weight and fertilization protect economic yield against saline water. It is concluded that fertilization, especially combination of organic and inorganic fertilizer, could be recommended for economical production of borage under saline condition in Zabol.

Yield increasing and also the introduction of new varieties of cotton is one of the main goals of researchers. The important goal of this research was recognition of superior varieties in terms of yield. New and cultivated cotton genotypes including new varieties B557, T3, T2, SB35 and commercial cultivars like Moghan, Golestan and Sahel were evaluated in a randomized complete block design in Karkandeh Cotton Research Station. The results showed that T2 variety with 2160 kg/ha had the highest yield and SB35 variety with 1806 kg/ha had the lowest yield. Variety of B-557 with 75.8 % and varieties of T2 and T3 with 73.5 and 74.6 % were the earliest genotypes, respectively. Late maturity among varieties belonged to Armaghan and SB35 varieties with 53.8 and 55.7 %, respectively. The highest and lowest bolls weight were related to Golestan cultivar with 183.2g and T3 genotype with 153/8g, respectively

Self-incompatibility is one of the most important difficulties in almond production which reduce fruit set drastically and makes orchard management difficult. Therefore, breeding of almond to produce self-compatible genotypes is very important. In this research, level of self compatibility in 50 selected genotypes of different crosses was studied using linked markers through PCR analysis and fruit set. Result showed that 31 genotypes had band with length of 450 bp which were identified as self-compatible genotypes. Study of fruit set after self pollination showed that 31 genotypes with fruit set more 5% identified as self-compatible. The most fruit set after self pollination observed in genotypes number 42, 45 and 24 to rate 26.94, 25.1 and 25 percentages, respectively. Comparing fruit set percentages after self pollination with open pollination showed that selfing reduced fruit set percentages but the decrease of the fruit set in some genotypes was very low. The result of investigation of fruit qualitative and quantitative characteristics showed, in total, very self compatible genotype number 24, was better than other genotypes. This genotype produced fruit, nut and kernel with medium size. Fruit, nut and kernel weight was 10.80, 3.98 and 1.41 g, respectively. Nut and kernel color of this genotype was bright and its kernel taste was sweet. The beginning of flowering in this genotype was later than other genotypes and fruit harvest dater was sooner than other genotypes. In total in this research, genotype number 24 identified as suitable genotype.

In order to investigate the effect of planting date on qualitative and quantitative characteristics of medicinal plant of black cumin was investigated in a split plot experiment based on randomized complete block design with four replications at Khomeini – shahr, in the province of Isfahan, Iran, during growing season of 2009-2010. In this study India and Isfahan populations were assigned to main plots and four sowing date (16 Nov, 16 Dec, 6 Mar and 4 Apr) to sub plots. The results indicated that planting date, populations and their interactions had significant effect on most of the traits measured. It was also observed that the two populations were significantly different in phenological, morphological and qualitative characteristics. Isfahan population due to its compatibility to the climate of Isfahan produced highest seed yield and oil percent than the Indian population at 6 Mar. planting date. Also, late planting date resulted in reduced values of most of the traits related to yield and yield components. It was also observed that highest dry matter, manganese, sodium, calcium and zinc contents were obtained from the Isfahan and highest content of ash, potassium, phosphorus, magnesium, copper and iron from Indian populations. It may conclude that if it is aimed to have higher seed yield and oil percent it is better to plant Isfahan population at the second and third and Indian population at the third planting dates.

In order to investigate the agro-morphological and physiologic characteristics of different silage corn genotypes، an experiment was carried out at Agricultural and Natural Resource Research Center of Tehran Province during 2009-2010. In this experiment، twenty genotypes of silage corn were compared in the form of Randomized Complete Blocks Design with four replications. Evaluated traits were growth period، number of leaf، plant height، stem diameter، dry and freshweight of leaf، stem، sheath، ear as well as dry and fresh forage yield and its quality. Correlation among studied treats showed، dried weight of stem، ear and sheath had the highest correlation with forage yield. The genotype No. 2 (K3547/4×MO17) had the highest correlation in the most of investigated characteristics such as number of leaf، stem diameter، dry and fresh weight of sheath and ear، growth period and dried forage yield، but didn’t showed appropriate quality. In respect to forage quality، the genotypes of No. 16 (KLM76004/2-1-7-2-1-1-1-1 ×K19/1) and No. 18 (KSC670 (K3653/2×K19)) showed the highest percent of dry matter digestibility and the genotype No. 2 pointed out the highest percent of crude protein، percent of dissolved fiber and ash percent. The genotype No. 18 allocated the highest percent of metabolizable energy. So، it seems that the genotype No. 16 with middle height but folious، middle stem weight and relatively high ear weight and produced forage quality is of particular importance and can be a suitable option for the region.