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ارزیابی کارآیی جذب و استفاده پتاسیم در ژنوتیپهای پنبه | ||
| به زراعی نهال و بذر | ||
| مقاله 2، دوره 35، شماره 1، تیر 1398، صفحه 59-81 اصل مقاله (847.67 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/sppj.2018.122463.1042 | ||
| نویسندگان | ||
| عبدالرضا قرنجیکی1؛ اسماعیل دردی پور* 2؛ عمران عالیشاه3؛ فرشید قادری فر2 | ||
| 1دانشجوی دکتری، گروه علوم خاک، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران | ||
| 2دانشیار، گروه علوم خاک، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران | ||
| 3دانشیار، مؤسسه تحقیقات پنبه کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، گرگان، ایران | ||
| چکیده | ||
| شناسایی و انتخاب ژنوتیپهای با کارآیی جذب و استفاده پتاسیم میتواند به افزایش بازده کودهای پتاسیمی و استفاده بهتر از پتاسیم قابل جذب خاک در اراضی دچار کمبود این عنصر کمک کند. بدین منظور در یک آزمایش هیدروپونیکی (آبکشت)، کارآیی پتاسیم 25 ژنوتیپ پنبه بررسی شد. ژنوتیپها در دو سطح کمبود (025/0 میلیمولار) و کفایت (5/2 میلیمولار) پتاسیم رشد یافتند و گروهبندی کارآیی پتاسیم براساس شاخصهای وزن خشک اندام هوایی در سطح کمبود، نسبت وزن خشک اندام هوایی در سطح کمبود به سطح کفایت و کارآیی استفاده پتاسیم انجام شد. کمبود پتاسیم منجر به کاهش معنیدار وزن خشک، غلظت و جذب پتاسیم ریشه و اندام هوایی ژنوتیپهای پنبه شد، اما کارآیی استفاده پتاسیم آنها را افزایش داد. همبستگی بسیار معنیدار (**98/0 = r) بین وزن خشک ریشه و اندام هوایی بدست آمد. همبستگی وزن خشک ریشه و اندام هوایی با جذب و کارآیی استفاده پتاسیم نیز معنیدار بود. براساس نتایج گروهبندی کارآیی پتاسیم از نظر شاخصهای وزن خشک اندام هوایی و نسبت وزن خشک اندام هوایی، شش ژنوتیپ پنبه در گروه کارآ قرار گرفتند، اما از نظر کارآیی استفاده پتاسیم فقط چهار ژنوتیپ کارآیی داشتند. در نهایت براساس جمعبندی نتایج، ارقام گلستان، ساجدی و ژنوتیپ N2G80، ژنوتیپهای کارآ در جذب و استفاده از پتاسیم شناسایی و انتخاب شدند. | ||
| کلیدواژهها | ||
| پنبه؛ کمبود پتاسیم؛ کفایت پتاسیم؛ وزن خشک؛ هیدروپونیک | ||
| عنوان مقاله [English] | ||
| Evaluating of Potassium Uptake and Utilization Efficiency in Cotton Genotypes | ||
| نویسندگان [English] | ||
| Abdolreza Gharanjiki1؛ Esmaeil Dordipour2؛ Omran Alishah3؛ Farshid Ghaderifar2 | ||
| 1Ph. D. Student, Gorgan University of Agriculture and Natural Resources Science, Gorgan, Iran. | ||
| 2Assosiate Professor, Gorgan University of Agriculture and Natural Resources Sciences, Gorgan, Iran. | ||
| 3Assosiate Professor, Cotton Research Institute of Iran, Agricultural Research, Education and Extension Organization, Gorgan, Iran. | ||
| چکیده [English] | ||
| Identification and selection of efficient genotypes for uptake and utilization of potassium (K) can help to increasing potassium fertilizers and available soil potassium use efficiency in K-deficient soils. Therefore, efficiency of of potassium uptake and utilization 25 cotton genotypes was studied in deficient (0.025 mM) and sufficient (2.5 mM) potassium levels in a hydroponics experiment. Potassium efficiency of cotton genotypes were classified based on three criteria including; shoot dry weight in K-deficient level, the dry weight ratio (dry weight in K deficient : dry weight at K sufficient), and K use efficiency. Potassium deficiency decreased dry weight, K concentration and K uptake by root and shoot of cotton genotypes, while K use efficiency increased in deficient K level. Very high and significant correlation (r = 0.98**) was observed between root and soot dry weight of genotypes. Correlations between root and shoot dry weight with K uptake and K use efficiency were also significant. Grouping of potassium efficiency of cotton genotypes identified six efficient genotypes based on soot dry weight and dry weight ratio, whereas only four efficient genotypes were identified based on K use efficiency. In conclusion, cv. Golestan, Sajedi and genotype N2G80 were selected as efficient genotypes for potassium uptake and utilization. | ||
| کلیدواژهها [English] | ||
| Cotton, potassium deficiency, potassium sufficiency dry weight, hydroponics | ||
| مراجع | ||
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