فهرست مطالب لیلا سلیمانپور

Nano-fertilizers due to the small amount of used fertilizer and the accuracy of plant acquisition are considered as a strategy to reduce inputs and achieve sustainability in agriculture production. In this experiment, the effects of nano iron and iron nitrate on the growth characteristics of wheat in different wheat and chickpea intercropping systems were investigated. The experiment was performed as split-split plot in randomized complete plot design with three replications in the research field of Campus of Agriculture and Natural Resources, University of Tehran, Karaj, Iran, in 2019. The main plots included five planting patterns (wheat monoculture, pea monoculture and three intercroppings of wheat:pea with 50:50, 70:50 and 90:50 ratio), sub-plots included three fertilizer treatments (control, nano-iron and iron nitrate) and sub-sub-plots included two fertilizer concentrations (1500 and 750 mg/L). The results showed that the 50:70 intercropping and concentration of 750 nano-iron had the highest iron use efficiency of wheat and in total, the iron use efficiency of wheat in 50:70 intercropping was higher than the other planting patterns. In contrast, the highest iron use efficiency of pea was observed in 50:90 intercropping and 750 concentration of iron nitrate. In all intercropping treatments, the fertilizer use efficiency by wheat and pea in nano-iron was higher than iron-nitrate. The highest wheat biomass and grain yield was obtained in monoculture + nano-iron (16371 and 5042 kg/ha, respectively) and monoculture + iron-nitrate (16062 and 5554, respectively), and the lowest wheat biomass and grain yield was related to 90:50 intercropping and iron-nitrate, but the highest pea biomass and grain yield in most fertilizer treatments at the concentrations of 750 and 1500 mg/L was related to iron-nitrate and nano-iron, respectively. The results of this experiment showed that in most of the planting pattern treatments and in all studied traits, the concentration of 750 mg/L iron nano-fertilizer was similar or even higher than the concentration of 1500 mg/L and therefore, a lower concentration of nano-fertilizer can be used and the consumption of fertilizer can be reduced.

Silicon (Si) is one of the useful elements for the growth of many plant species and increases the plantchr('39')s resistance to various types of abiotic and biotic stresses. Despite their many advantages, the application of silicon nanoparticles (Si-NPs) has been less explored in agriculture. These nanoparticles affect the metabolic activity of plants by entering plants. Also, due to the porous nature of silica nanoparticles, they are suitable nanocarriers for various molecules in agriculture. A large group of proteins and genes cause the transfer of silicon in the plant. Lsi1 (Lower silicon transprter 1) and Lsi2 (Lower silicon transprter 2) are two main types of Si transporter in the uptake and distribution of Si have been identified. Identification of these transporters has determined the path of silicon uptake from the root level and its transfer to the shoots. But the Si transporter involved in silicon uptake in the xylem have not yet been fully identified. Also, silicon transporters for silica cells, in which a very high amount of silicon accumulates are not known. Because the beneficial effects of silicon in the plant are related to the amount of silicon accumulation in the plant, it is important to study the mechanism of Si uptake and transport in plants. This paper investigates the uptake, transport, and accumulation of silicon in plants as well as the importance of silicon and nano silicon for agricultural products.

     Several factors affect the crop yield and weeds are among the most important factors reducing crop yields .There are high tendency to develop alternative methods of herbicides for natural control of weeds in organic products. One of the alternative methods to manage weeds is intercropping. Intercropping is growing two or more crops simultaneously in a piece of land during a growing season. The objectives of the present study were to examine the effect of cereal- legume intercropping on weeds growth. A field experiment was conducted in College of Agriculture of Darab, Shiraz University during 2014-2015.      In the experiment 16 treatments (five weed free monocultures of wheat (M1), barley (M2), triticale (M3), pea (M4), faba bean (M5), 5 weedy monocultures of wheat (WM1), barley (WM2), triticale (WM3), pea (WM4), faba bean (WM5), and six replacement intercropping treatments of wheat + pea (I1), wheat + faba bean (I2), barley + pea (I3), barley +  faba bean (I4), triticale + pea (I5) and triticale + faba bean (I6) without weed control) using a randomized complete block design (RCBD) with three replicates were studied. Cereals and legumes were planted simultaneously at 23 November 2014. Planting operation was conducted on both sides of the ridges.    Weed diversity was calculated by Shannon diversity index:     N=Total number of plants in each plot of one square meter, Ni= number of species i plants, S= total number of species, and H= Shannon diversity index. This index value ranging from zero to five, higher index value, greater diversity.      The results showed that the lowest density and biomass of weeds were obtained in both sole culture and intercropping of barley. For instance, the lowest weed biomass was observed in monoculture of weedy barley (1 g m-2), intercropping of barley + faba bean (12.67 g m-2) and intercropping of barley + pea (56 g m-2). The weed density at weed free sole culture of barley (30 plants m-2) was lowest that followed by barley + faba bean intercropping (81 plants per m-2). The lowest species weed diversity was obtained in barley + pea (zero) and weedy barley (0.007), respectively. The weed diversity of most intercropping treatments was similar or less than that of weedy sole culture. In General, pea or faba bean monoculture had greatest weeds density and biomass, because slow growth and late seedling establishment. However, cereals especially barley controlled weeds properly, due to greater growth rate, higher height and greater density than those of legumes. Intercropping of pea and faba bean with cereals reduced weeds growth and had lower weeds density and biomass than those of pea and faba bean weedy monocultures. In order to increase of legume yields, more density of legume should be intercropped with cereals.      In general, intercropping treatments caused a significant decrease in weeds density and biomass compared to the legumes monoculture. In this experiment barley and triticale due to good properties such as fast growth, high plant height and more shading could considerably control weeds in both monoculture and intercropping treatments, reducing significantly weeds density and biomass in itself sole culture and intercropping treatments. To reduce the weeds growth in faba bean and pea, which have a poor competitive ability with weeds, intercropping with cereals, especially barley and triticale, in the south of Fars province is recommended. However, intercropping is one of the ways to reduce weeds in the long term and its effects on weeds in the long period will be much more.     The authors would like to acknowledge the College of Agriculture and Natural Resources of Darab, Shiraz University, to finance the project and all those who helped us in this project.

Spiritual healthcare team members, especially nurses, play a key role in providing holistic care. Spiritual wellbeing in students is essential to identifying the spiritual needs of patients and their spiritual support. Characteristics such as spiritual intelligence influence the attitude of individuals toward spiritual matters, as well as their spiritual wellbeing. The present study aimed to determine the association between spiritual intelligence and spiritual wellbeing in nursing students. This descriptive-analytical study was conducted on 178 students in Borujen Nursing College, Iran in 2015. Participants were selected via census sampling. Data were collected using a demographic questionnaire, spiritual intelligence questionnaire (Badi et al.), and spiritual wellbeing scale (Paloutzian and Ellison). Data analysis was performed in SPSS version 16 using descriptive and analytical statistics. A positive, significant correlation was observed between the spiritual intelligence and spiritual wellbeing of the students (r=0.7; P≤0.001). According to the regression analysis, spiritual intelligence could predict spiritual wellbeing (r2=0.54; P≤0.001). Mean total spiritual intelligence in the students was 3.63±0.3 (range: 1-5), and mean total spiritual wellbeing was 4.3±0.6 (range: 1-6). No significant correlations were observed between spiritual intelligence and spiritual wellbeing with demographic variables (P≥0.05). According to the results, spiritual intelligence results in the spiritual wellbeing of students. Moreover, spiritual intelligence could predict the improvement of spiritual wellbeing. Therefore, it is recommended that educational managers consider the role of spiritual intelligence in spiritual wellbeing and periodically review and improve these variables in students through proper planning

To investigate the amount of nitrogen (N), phosphorous (P) and potassium (K) uptake in crops and weeds in cereals-legumes intercropping, a field experiment was performed in 2014-2015. Treatments included 10 monoculture (wheat, barley, triticale, pea and bean with and without weeds) and 6 intercropping (wheat pea, wheat faba bean, barley pea, barley faba bean, triticale pea and triticale faba bean with weeds) which laid out in a randomized complete block design (RCBD) with three replicates. Our results showed that the highest N content in cereals shoot was obtained in weed-free monoculture wheat (8.1 %) and in legumes shoot was obtained in weedy monoculture pea (17.3 %) and weed-free monoculture pea (15.8 %). There was no significant difference between weedy monoculture and intercropping treatments for N content in weed shoot, according to Duncan test. The highest value of P content in cereals shoot was observed in faba bean숗 intercropping (0.80 %) and weed-free monoculture wheat (0.79 %). The highest amount of P content in legume and weeds was obtained in weed-free monoculture pea (1.90 %) and weedy monoculture pea (0.13 %). The highest amount of K content in cereals, legumes and weed shoot was obtained in barley-pea intercropping (1.95 %), triticale-pea (1.59 %) and barley-pea (1.90 %), respectively. Thus, intercropping can reduce nutrients availability for weeds and it can cause an increase in nutrients for crops.

In order to investigate the response of cereals to intercropping with legume in weed competition conditions, a field experiment was performed in 2014-2015 in the College of Agriculture and Natural Resources of Darab, Shiraz University. Treatments included 10 monoculture (wheat, barley, triticale, pea and bean with and without weeds) and 6 intercropping (wheat + chickpea, wheat + faba bean, barley + chickpea, barley + faba bean, triticale + chickpea and triticale + faba bean with Weeds) which laid out in a randomized complete block design (RCBD) with three replications. Results showed that grain yield, biological yield and harvest index in most intercropping treatments was similar to those in weedy monoculture and even in some cases similar to those in weed-free monoculture treatments which it shows that intercropping had a higher efficiency. For instance, grain yield in barley+ chickpea intercropping (6241 kg ha-1) and barley+ faba bean (5333 kg ha-1) was not significantly different from weedy barley monoculture (7313 kg ha-1) and weed-free barley monoculture (7621 kg h-1). Partial LER of cereals, in intercropping treatments except wheat+faba bean (0.39) based on weedy monocultures, was greater than 0.5 and also except intercropping of triticale + chickpea (0.31) and wheat + faba bean (0.41) based on weed-free monocultures was more than 0.5. Barley had a greatest grain and biological yield over all the treatments which it was because of its superior competitive ability against weeds.

Addition of organic residues to soil in organic farming may change soil K status and subsequently its availability and cycling. For this purpose, an experiment was done as factorial in completely randomized design with application of 11 organic materials (alfalfa, barley, pea and broad bean residues and sheep, cow, camel, poultry, pigeon and quail manures and vermicompost) in two clayey soils of Darab and Sepidan (Fars province) under two moisture conditions (field capacity and saturation) with three replicates. First, 2 g of organic materials was added to 100 g of soil samples and incubated for two months under field capacity and saturation conditions and laboratory condition (22±2˚C) and then the contents of soluble, exchangeable and non-exchangeable K were determined. Results indicated that all organic materials, except for vermicompost, alfalfa residue and camel manure increased soluble K and the highest increase was related to sheep manure up to 228 mg kg-1. The content of exchangeable K was increased with all organic residues application from 70 to 730 mg kg-1. The content of non-exchangeable K was also increased with organic residues application and the highest and lowest increases were found for poultry manure and camel manure, respectively. Generally, the contents of soluble and exchangeable K of Darab soil and non-exchangeable K of Sepidan soil were more affected by organic materials application. The saturation condition increased exchangeable K and decreased soluble and non-exchangeable K. Increase in the content of soluble K and soil salinity should be considered for organic amendments application to soils with high leaching potential and for salt sensitive plants.

IntroductionCereal-legume intercropping is one of the best ways to increase the yield per unit area (to decrease the detrimental effect caused by weeds and to reduce application of fertilizers and herbicides. Stoltz et al. (2014) in a study on corn-pea intercropping reported that crops yield in intercropped plots was significantly greater than that of monoculture. It has been reported that barley-faba bean intercropping led to an increase in total grain yield and it could cause a decrease in weed biomass. Considering the importance of intercropping to reach stability and sustainability in production, the aim of this study was to assess the changes in yield and yield components of faba bean and pea in intercropping with wheat, barley and triticale under weedy conditions in southern Fars Province.
Materials & MethodsA field experiment was performed in the College of Agriculture and Natural Resources of Darab, Shiraz University during 2014-2015. Treatments included 10 monoculture (wheat, barley, triticale, pea and faba bean with and without weeds) and 6 intercropping (wheat pea, wheat faba bean, barley pea, barley faba bean, triticale pea and triticale faba bean with weeds) which laid out based on a randomized complete block design (RCBD) with three replications. Irrigation intervals were 8 and 12 days based on environmental conditions. Weeds were hand weeded twice, at tillering and booting stages of cereals. After crop maturity, plants were hand harvested to measure yield and yield components. Additionally, partial land equivalent ratio (LER) was calculated. The partial land equivalent ratio has been defined as a measure of efficiency of an intercrop or mixture. The LER compares land areas required under single or sole cropping to give the yields obtained from the component crops of the mixture. Values greater than 0.5 indicate intercropping to be more efficient than sole cropping in terms of land use, while values less than 0.5 indicate a loss in efficiency due to intercropping. Values equal to 0.5 indicate that the components fully share the same limiting resource. The data analyzed by using MSTATC ver2.10 software (1991). Since the number of the plants was not similar in all the plots, the data was subjected to analysis of covariance.
Results & DiscussionResults showed a significant effect of treatments on 1000-seed weight of pea, number of pod per m2, number of seed per pod, grain yield, biological yield, harvest index and LER. The greatest 1000-seed weight of pea, number of pod per m2, seed yield and harvest index obtained in intercropping of wheat pea (366.7 g), weed-free pea monoculture (1317), weed-free faba bean monoculture (4149 kg/ha) and weed-free faba bean monoculture (46.46 %), respectively. The highest number of seed per pod was obtained in intercropping of barley faba bean (3.7), weed-free faba bean monoculture (3.29) and intercropping of wheat faba bean (2.93), respectively. Total and partial LER of legumes in all intercropping treatments compared to weedy monoculture was greater than 1 and 0.5, respectively. The results showed that weed-free monoculture treatments had the highest grain yield, biological yield and harvest index. However, crop yield and harvest index in intercropping treatments were similar or superior to weedy monocultures. For instance, grain yield and harvest index in intercropping of wheat faba bean was higher than those of in weedy faba bean monoculture, 102 and 93 %, respectively. In general, grain yield, biological yield and harvest index of pea and faba bean in weed-free monocultures treatments was higher than weedy monocultures and intercropping treatments. Grain yield and harvest index of intercropping was similar or higher than those of weedy monocultures.
ConclusionTotal and partial LER of legumes in all intercropping treatments compared to weedy monoculture was greater than 1 and 0.5, respectively. Since cereals are more competitive than legumes, it seems for increasing the efficiency of intercropping; a higher density of legumes should be used. Additionally, for reducing weed interference and increasing yield in pea and faba bean, the use of cereal-legume intercropping is recommended.