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Differences in the efficiency of Potassium (k) Uptake and Use in Barley Varieties

Agricultural Sciences in China 2011年第1期10卷 101-108页

作者： WU Jin-tao ZHANG Xi-zhou LI Ting-xuan YU Hai-ying HUANG Ping College of Resources and Environmental Sciences Sichuan Agricultural University Ya＇an 625014 P.R.China Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 P.R. China

Screening of crop genotypes with high k efficiency plays a fundamental role in understanding their physiological mechanisms. In this study, pot culture experiment was conducted to reveal the differences in uptake and use of k among 56 barley varieties. The coefficient of variation （CV） of k uptake （ku） and k dry matter production index （kDMPI） of these varieties were higher than other indices and both ku and kDMPI were significantly different among the barley varieties. Furthermore, ku and kDMPI were positively correlated with dry matter weight （DMW） during the whole growth period; k use efficiency （kUE） and k harvesting index （kHI） were significantly related to dry grain weight （DGW） at maturing stage. Through cluster of these indices, Sandrime and AC Westech were found to be the most k-efficient and k-inefficient genotypes of barley, respectively. Significant differences were observed in uptake and use capacity of k between the two genotypes. During the whole growth period, ku, k dry matter production efficiency （kDMPE）, kDMPI and DMW of the k- efficient genotype were found to be 1.5-1.8, 1.4-2.3, 2.1-3.9, and 1.7-2.1 times higher than those of the k-inefficient genotype, respectively, and at maturing stage, DWG, kUE, and kHI of efficient genotype were higher than those of the inefficient one. The results also showed that Sandrime was the most efficient candidate among the tested varieties for k efficiency and further studies should be conducted to investigate its physiological and biochemical characteristics.

关键词： barley cluster analysis genotype k-efficiency

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Preparation, Characterization and Evaluation of Efficacy of Phosphorus and Potassium Incorporated Nano Fertilizer

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Advances in Nanoparticles 2017年第2期6卷 62-74页

作者： Anjuman Ara Rajonee Shurovi Zaman Shah Muhammad Imamul Huq Department of Soil and Environmental Sciences University of Barisal Barisal Bangladesh Department of Environmental Science and Disaster Management Noakhali Science and Technology University Sonapur Bangladesh Department of Soil Water and Environment University of Dhaka Dhaka Bangladesh

Phosphorus and Potassium incorporated nano fertilizer were prepared using zeolite as a carrier material at a laboratory scale. X-ray diffraction (XRD) analysis was done for the characterization and confirmation of the incorporation. Chemical analyses also indicate the sorption of fertilizer material into zeolite. An in vitro incubation study was conducted for 30 days at field moisture condition to see the release of the fertilizer materials and was compared with a conventional fertilizer. The release pattern of nutrients from either source showed a substantial decreasing trend with time although the release of P and k was higher for nano fertilizer than the conventional one. A pot culture experiment with Ipomoea aquatica (kalmi) was also conducted to see the efficacy of the nano fertilizer in the growth promotion of the plant. Analysis showed higher accumulation of P and k in plants grown with nano fertilizer. Post-effect of nano fertilizer application in soil showed better pH, moisture, CEC, available P and k under nano fertilizer treatment than the conventional fertilizer.

关键词： Nano Fertilizer Preparation Efficacy P-efficiency k-efficiency

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