نشریه یافته های نوین کشاورزی
سال پانزدهم شماره 1 (پیاپی 44، پاییز 1399)

In the 2016-2017 crop year, an experiment was conducted in Irandegan, Khash city, Sistan and Baluchestan province under heat stress conditions in a split plot design in randomized complete blocks with three replications to investigate the effect of heat stress on yield and yield components of a number of rice cultivars. The main factor was the use of Shafaq, Shiroodi, Basmati, and Hir cultivars, while the sub-factor was planting on April 9th, April 30th, and May 22nd. According to the results of the analysis of variance, the interaction of cultivar with planting date affected straw weight, flag leaf length, grain weight, 1000-seed weight, grain yield, production efficiency, percentage of inoculated seeds, percentage of hollow seeds, and percentage of gypsum seeds. Plant height and spike length also differed significantly across varieties. In addition, planting date and cultivar had an effect on the quantity of seeds per sike. The highest straw weight (2046.3 g/m2) was obtained on April 30th in the Basmati cultivar, the highest grain yield (5688.7 kg / ha) on May 22nd in the Shafaq cultivar, the highest percentage of inoculated seeds (89.7 percent) on May 22nd in the Hir cultivar, and the highest percentage of gypsum seeds (73.33 percent) on May 22nd in the Basmati cultivar. In the face of heat stress, the Shafaq cultivar maintained a satisfactory yield. According to the findings, the greatest yield is associated with May 22nd, and the best cultivar to suggest growing in the area based on the highest yield is Shafaq.

This research in order to study the effects of the effect of bio fertilizer and magnesium sulfate on the components of essential oil of Satureja hortensis L., was performed. The experiment was based on randomized complete block design with 6 treatments and 3 replications. The factors consisted of 2 levels of inoculation with fertilizer barvar 2 and non-inoculation) and 3 levels spraying of magnesium sulfate (0, 2 and 4 g). The traits were plant height, number of stems, stem diameter, dry weight, yield, essential oil percentage and essential oil yield. The results of analysis of variance showed that the highest yield was obtained by inoculation with fertilizer barvar 2 and 4 g magnesium sulfate, with a mean of 80/50 kg ha-1, and the lowest yield in non-fertilized treatment with fertilizer barvar 2 and the non-application of magnesium sulfate with a mean of 23 kg ha-1 was obtained. The results showed that the highest percentage of essential oil was obtained by inoculation with barvar 2 and 4 g magnesium sulfate with an average of 1.02 kg ha-1 and the lowest percentage of essential oil without Fertilizer barvar 2 and non-application of magnesium sulfate with the average was 0.64 kg ha-1. In general, the results of this experiment showed that in order to produce more essential oil and to have more dry yield, it seems appropriate to inoculate with barvar 2 and 4 g magnesium sulfate.

In order to investigate the effects of compost and earth worm on and quantity and quality yield of salvia officinalis, an experimental was carried out based on factorial in completely randomized block design with three replications in experimental in the Challus University in 2014. The treatments were included 1-Erath worm with application levels (0.10 and 20 class) 2-compost with consumption levels (0 and 30g per pot) and 3-type soil tissue (sand and clay). The evaluation of characteristics was included, dry matter of plant, rate of essence, CEC, OM%, N%, pH and EC. The highest of dry matter of plant and rate of essence with interaction effects treatment application Erath worm and consumption of 30g compost was obtained. Maximum N percentage of soil (0.47), OM percentage (1.53), CEC (23.66) in interaction effects 20 class earth worm with 30g compost achieved application of earth worm induce EC increased significantly. Increase dry matter of plant and rate essence that was affected Application earth worm and compost consumption induce to dry matter of plant and rate essence increased because CEC, %OM and %N soil with treatments of application earth worn with compost were increased.

This study was conduct to investigate effect of Salicylic acid and Gibberellic acid to the reaction of turnip seed temperature and relative to the pretreatment premier herbal physiology lab in Azad University of bojnourd in academic year of 2015-2016 has done. The experiment for factorial in format of very random repeated for 4 times. The hormones growth promoters contain in the amount of 0, 250, 500 mg/l for 24 hours and Salicylic acid in the amount of 0, 250, 500 mg/l for 10 hours at different temperatures of 15, 20, 25, 30, 35 Ċ in 12 days' germination examined. After reviewing the results can be stated that the use of seed priming increased germination rate and uniformity of emergence in different temperature conditions to 30 ° C was effective and could reduce the time to 50% germination, In general can say to use of Gibberellic acid prime at a concentration of 500 mg/l And Salicylic acid treatment with concentration of 250 mg/l At higher temperatures reduce the effects of thermal stress on Index germination and seedling components And improve the germination.

One of the most important and valuable plants in the pharmaceutical industry is the hull-less pumpkin (Cucurbita pepo L. var. Hamedani) plant, which belongs to the cucurbitaceous family. The aim of this research was to evaluate the effect of deficit irrigation and kaolin clay on yield and yield components of (Cucurbita pepo L.). Experiment was laid out as a split plot design with randomized complete block design with three replications at the field located in Siahbaz village, Khoy district, Iran. The main factors included irrigation at four levels (complete irrigation, deficit irrigation from the shoot stage, deficit irrigation from flowering stage, Deficit irrigation from seed filling stage) and sub-factor including three levels of kaolin (control, 3% kaolin, 6% kaolin) was considered. Analysis of variance showed that the effect of deficit irrigation and kaolin on number of seeds per fruit, fruit yield, 1000 grain weight, grain and biological yield, harvest index, oil and protein percentage, oil yield and protein yield were significant. Analysis of variance showed that irrigation treatment at different growth stages had significant effect on leaf number at 1% probability level, but application of kaolin and interaction of irrigation and kaolin on number of leaves per plant was not significant. The results showed that the highest grain weight (294.55 gr), grain yield (807.2 kg/ha), oil percentage (46.2) and oil yield (373.3 kg/ha) were related to complete irrigation treatment. Irrigation at grain filling stage had no significant effect. Deficit irrigation treatment at the stem stage showed the lowest of studied traits. The highest grain weight (257.07 gr), grain yield (733.7 kg/ha) and fruit yield (23.84 kg/ha) were observed in the 3% kaolin spraying treatment. Kaolin 3% increased oil yield, oil percentage, protein percentage and protein yield compared to control treatment. Interaction between deficit irrigation and kaolin consumption was not significant on any of the traits of pumpkin. According to the results of means of oil and protein yield, complete irrigation and cessation of irrigation at filling of grain, were in a statistical group and there was no significant difference with kaolin 3% and cessation of irrigation in filling of grain, the desired quantitative and qualitative yield can be achieved in Pumpkin.

Salinity stress causes change in absorption and transformation of nutrients in rice plants. In order to determine of salinity, affect in different growth stages of rice crops on the concentration of sodium, potassium, calcium and magnesium ions of roots, stems and leaves, was carried out pot experiment in the greenhouse of rice research institute of Iran(Amol) in 2014. The experiment as a split plot factorial in base of completely random design with three replicates, with two rice varieties, hybrid rice (Dialam) and PSBRC88 as main plots, and three levels of salinity (0, 6, 12 ds.m-1) with three growth stages (Tilling, Stem elongation, Flowering) as sub-plots factorial. Hydroponic culture was done in pots with 6 L Yoshida solution. The content of sodium, potassium, calcium and magnesium ions of roots, stems and leaves were measured that salinity treatments were done about 20 days for each stage. The results showed that the content of potassium, calcium and magnesium ions of roots, stems and leaves were decreased with increasing of salinity level at each growth stage. In check treatment, the highest of ions concentration was at flowering stage and the ions content of roots was always less than stems and leaves. The concentration amount of potassium, calcium and magnesium were higher in PSBRC88 variety than hybrid rice (Dialam). Therefore, PSBRC88 variety had higher ions uptake efficiency of sodium, potassium, calcium and magnesium in slat stress and had more biomass.