Sesame (Sesamum indicum L.) is a survivor crop. It is one of the most important oilseed crops. Despite of its tolerance, drought is one of the most important environmental factors that limit sesame production. Iran has an arid and semi-arid climate and very fertile lands for agriculture that the main factor limiting production is their lack of water. In this study, the experimental treatments consisted of irrigation levels as the main plot at four levels and fifteen cultivars of Sesame as the subplot was considered. Morpho-agronomic traits such as plant height, number of capsules per plant, seed number/capsules, weight of 1000 seeds, number of branches, grain yield, number of leaves per plant, biomass, and oil content were recorded. The study of analysis of variance (ANOVA) showed significant differences at P<0.01and P<0.05 among cultivars and irrigation levels for all traits. Results of Duncan's test indicated that Darab14, TS3, Halil, Yellow, white and JL13 cultivars were found to be the best cultivars for normal and drought stress conditions. Genetic diversity was also studied based on various Morpho-agronomical traits using analysis of cluster and principal component analysis among studied cultivars. Analysis of cluster indicated that the
Agriculture plays an important role in protecting the environment in a healthy state ,the relationship between the natural environment and farming practices are complex. Agriculture has a significant effect on the environment. Declining water quality, loss of wildlife habitat, reduced biodiversity, and emissions of greenhouse gases are some of the major concerns specifically linked to agriculture. Contamination of soil, water and air, fragmentation of habitats and loss of wildlife, loss of biodiversity, increased flooding and drought, soil erosion and increasing greenhouse gases may be inappropriate practices agriculture and land use. Well as agricultural streams and rivers affect water Quality. Intensive farming has serious consequences on the environment. Thus increasing concerns about excessive environmental impacts agriculture has led to the introduction of Agri-environmental schemes. Continued increases in agricultural production raise some environmental challenges that are continually evolving in their nature and complexity. The environmental focus has been on the conservation of natural resource base upon which agriculture depends, particularly soil, water and genetic resources for crops and livestock. The main objectives of this paper are to provide the broad agri-environmental context, examine the state of agri-environmental information, current agri-environmental statistics developments and future directions. Agri-environmental measures are among the most important instruments for the promotion of environmentally adapted agricultural land use.
Fifteen Roselle (Hibiscus sabdariffa L.) accessions were collected from different geographical regions of Baluchestan in Iran and were grown in Randomized Complete Block Design (RCBD) with three replications. Data were recorded on days to 50% flowering (Calyces were harvested when they were tender and plump). When flowering reached 50%, data recording was started (Calyces were harvested when they were tender and plump). Morphological analysis indicated that all the studied characteristics have a significant difference at P< 0.05 or P< 0.01 among Roselle accessions. Cluster analysis indicated slight differences among accessions. Some of accessions performed better than others and were ranked higher. According to the results, the average of similarity among accessions was 97%. Thus, the observed morphological differences and similarity values of Hibiscus sabdariffa L. accessions maintained at Iran suggest that all the accessions possess a useable slight genetic diversity. Also, phenotypic correlations between various morphological characteristics indicated that there were highly significant correlations at P< 0.05 or P< 0.01 among the most studied characteristics. Phenotypic correlations indicated that some associated factors correlate with each other and contribute in the occurring of these characteristics.
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