H. Rahmany, F. Nuraky, M. Baradaran,
Volume 3, Issue 2 (Journal of Science and Technology of Greenhouse Culture 2012)
Abstract
It pays attention to cultivation greenhouse, and provides produce artificial condition and the variants environment have especially important for neutralizing in progressing extent agriculture processes. It is necessary for progressing we need suitable planning until we can move forward to producing program and we are needed to know about variants and limitation which obstacle the develop of this plantation . It is based on this research, general object for recognizing important variants than the useful management of the summer greenhouses in Khuzestan province do it. This research is a kind of usage and it conducted by measurement method in Khuzestan province. We use for gathering information from questionnaire achieve and interview method. In the research of the statistical social. There are 95 unite of the summery greenhouse of province. In order to, experts use of panel method for determining validity. They divided 30 the kind of the questionnaire and then gathering them, they calculate score 11.5 of kourenbakh (α) coefficient by SPSS software. This coefficient calculates for 2 parts, sustainable agriculture and skillful knowledge are %71 and %82 respectively. The results of research showed that age, courses studies and experience of owner`s greenhouse can make important differences in optimum management level. And also There are statistical significant relationship between the skillful knowledge of the owner`s greenhouse and their perception to sustainable agriculture with useful management. Additionally, education level couldn't affect on optimum management in summery greenhouses.
Sh. Haftbaradaran, A. H. Khoshgoftarmanesh, M. Afyuni,
Volume 4, Issue 3 (Journal of Science and Technology of Greenhouse Culture 2013)
Abstract
Zinc (Zn) deficiency in human, which results from diets low in bioavailable zinc, could be eliminated by increasing readily plant-available Zn in soil. Root exudates and organic acids released during decomposition of soil organic matter can affect the availability of Zn. Thus, this hydroponic experiment was conducted to investigate the effect of some chelates on Zn uptake and translocation in two wheat genotypes with different zinc-efficiency. Two wheat genotypes (Triticum aestivum L. Back Cross Rowshan as zinc-efficient and Kavir as zinc-inefficient) were exposed to two levels of zinc (10 and 100 µM) and six different carboxylic acids (citric, tartaric, oxalic, salicylic, ethylenediamin tetraacetic acid and L-methionine). Results showed that uptake capability of free and complexed species of Zn were completely different. Zn2+ activity in nutrient solution had negative correlation with shoot dry weight and positive correlation with shoot zinc concentration in Kavir genotype, while complexed species had opposite results. Back Cross Rowshan genotype showed opposite results in comparison with Kavir genotype. The response of wheat genotypes to different organic acids varied. EDTA treatment caused the lowest shoot zinc concentration in Kavir genotype (18.8 mg/kg), while the Back Cross Rowshan genotype had highest concentration (99.5 mg/kg). Tartaric acid and citric acid caused the lowest root Zn concentration in the Kavir genotype (26.7 and 58.6 mg/kg, respectively), while the highest content was observed in the Back Cross Rowshan genotype (83.2 and 98.1 mg/kg, respectively). Catalase activity had inverse relationship with root Zn concentration in both genotypes. According to the results of this research, different responses of the wheat genotypes to organic acids are related to different mechanisms of zinc-efficiency in genotypes.
