نشریه یافته های نوین کشاورزی
سال دهم شماره 3 (پیاپی 39، بهار 1395)

This field experiment was carried out as factorial in a randomized complete block design with four replications in Chapar-Sar Rice Research station, Mazandaran province, Iran in 2013. Treatments of source-sink limitation in four levels (including cutting of flag leaf, cutting of one third the end of panicle, cutting of leaves except flag leaf and control or without limitation) and pure lines of rice in four levels (No. 3, 6, 7 and 8) were the treatments. Results showed that source-sink limitation had significant effect on agronomic traits except the number of fertile tiller per plant, total grain number per panicle and 1000-grain weight. Different lines of rice had significant difference in all agronomic traits and grain yield. Also, interaction effect two factor was significant only on filled grain number per panicle and grain yield (P

In order to study the effects of Zinc and Manganese on yield and yield components winter canola varieties in Gilan, an experiment was carried out in Rice Research Institute of Iran, Rasht during 2009. The experiment was arranged in a randomized complete block design as factorial with three replications. In this experiment, factors include the use of micronutrient fertilizers in four levels (zinc sulfate, manganese sulfate, zinc sulfate and manganese sulfate mixture and their unapplication) and Varieties include in three levels Hyola 401, Hyola 308 and RGS003 were considered. The results showed that the effect of micronutrient fertilizers and variety on plant height, number of secondary branches per plant, number of pods per main stem, number of pods per secondary stems, number of seed per pod of main stem, number of seed per pod of secondary stems, seed yield and biologic yieldwere Significant. interaction the experimental treatments only on number of pods per secondary stems and number of seed per pod of main stem were Significant. The results showed that applying treatment Zinc Sulfate and Manganese Sulfate together in Hyola401 variety with average 74/00 pod and 26/20 seed have to most number of pods per secondary stems and number of seed per pod of main stem.

Water logging stress has high destroyer effect on quality and quantity of crop production. This experiment was carried out to investigate alcohol dehydrogenize (ADH) and fructose- 1,6- bisphosphate aldolase (FBPaldolase) activities in wheat leaf (N8019) in vegetative growth stage (4-5 leaved) under water logging duration effects in different temperature in the form of combined analysis design with CRD arrangement in 4 levels of water logging period (0, 24, 48 and 96 hour) and 3 levels of temperature (5, 10 and 20 ˚C) in tetraplicates. The results indicated that the effects temperature and water logging duration and their interaction were significant on ADH and FBPaldolase activities at 1 % level. With increasing water logging period, ADH and FBPaldolase activities increased in 5 and 10ºC. Under 20ºC, both enzyme activities increased until 48h of water logging but both enzyme activities increased significantly when water logging duration increased up to 96 h.

In order to evaluate the most appropriate method of planting and harvest times of forage sorghum Speedfeed, Strip plot in the form of randomized complete block design experiment with three replications in 1394-1393 at the ResearchCenter for Agriculture and Natural Resources Balochistan is located in the city of Iranshahr. Two different methods of planting furrow cultivation, napa, row, and different harvesting times Different harvesting times of 50, 60 and 70 days after planting, respectively, in the main plots and sub-groups. Traits such as growth habit, leaf and shoot dry weight, nitrogen, and protein content was measured Fsfrvptasym. The results showed that the effect of different planting methods on fresh and dry weight, shoot dry weight was statistically significant, but no significant difference in the percentage of nitrogen, phosphorus, potassium and protein was observed. Harvest time is also significantly more weight and leaves, fresh weight and dry, nitrogen and protein impressed. According to test results, treatment, planting furrow, row, and 70 days after planting harvest time to increase the quality and quantity of forage sorghum recommended Speedfeed Iranshahr conditions.

In order to interaction study hormonal priming and osmopriming on germination and biochemical indices sainfoin, an experiment was conducted as factorial based on randomized completely design with three replication. The first factor was three levels of non-consumption (control), 100 and 200 mg per liter consuming gibberellins and the second factor was non-consumption (control), consuming 5 and 10% polyethylene glycol. Based on the research results, pre-treatment of seeds with GA increased the percentage and rate of germination, root and shoot length, seedling dry weight, seed vigor, Amylase and peroxidase activity and the protein content. Average comparison results showed that amount of 100 mg per liter GA had the greatest influence. The results also showed that seed pre-treatment with polyethylene glycol (5%) had the best effect on measured traits and level 10% reduction root and shoot length and the protein content. In general, present research showed pre-treatment of sainfoin seeds with 100 mg per liter GA and 5% polyethylene glycol had greatest effect on germination and biochemical.

In order to study genetic variation and heritability in fifteen cultivars of red clover in climate conditions of Broujerd an experiment in based on randomized complete block design (RCBD) with three replications under irrigated conditions in Agriculture Researches Center and National Resources of Broujerd in 2013-2014 cropping year was carried out. The measured traits were including of dry and wet forage yield in three cuts, plant height, digestibility percentage, crude protein percentage (%CP),Water soluble carbohydrates (%WSC), insoluble fiber in acid percentage, crude fiber percentage (%CF) and ash percentage (%AH) in two cuts and ratio leaf to stem and regrowth rate in one cut. The qualitative traits were measured by near infrared reflectance (NIR) technology. The results of analysis of variance were indicated that differences between cuts for all traits and genotype effect and interaction genotype × cut for all traits except plant height and ash percentage were significant. Compare means, Duncan method were showed Chamran, Renova, Shahrecord and Reszti cultivars with range between 52 to 56 t.ha-1 wet forage and range of 17.3 to 18.3 t.ha-1 dry forage in general three cuts had the highest forage yield. In among them Renova and Shahrechord cultivars had the highest plant height and ratio leaf to stem, but Charmahal had high mean for qualitative traits including digestibility and total ash and low mean for ADF and %CP. low In other words, it had higher forage yield and quality. In comparison between means of cuts, the highest and lowest forage yield related to 1 and 3 cuts, respectively. Simple coefficients of correlation among forage yield with plant height and digestibility was positive and with ratio leaf to stem and soluble carbohydrates in water was negative and significant. Coefficients of correlation between digestibility and protein percentage were positive and significant and these traits had negative and significant correlation with soluble carbohydrates in water, percentage crude fiber and ADF. Results of principal components analysis (PCA) for 15 genotypes in 11 traits showed three first principal components explained 72% from total variation. In the first component, wet forage yield, digestibility percentage, crude protein percentage and soluble carbohydrate in water explained the highest variation. In the second component, plant height, insoluble fiber in acid, crude fiber percentage, total ash percentage had the highest vector coefficients. In the third component, dry forage yield with ratio leaf to stem had negative correlation. In cluster analysis base on the ward's method 15 genotypes of red clover for 11 traits placed in three clusters. Shahrod and Renova Cultivars placed in cluster number 3, and had high forage yield and medium digestibility percentage, crude protein percentage and soluble carbohydrates in water. In contrast, cultivars placed in cluster number 2, had medium yield but better quality. Cultivars placed in cluster number 1 had lower values for quantitative and qualitative traits.