scholarly journals Characteristics of nutrient absorption and water purification in some plant species grown by floating culture system

2004 ◽  
Vol 50 (3) ◽  
pp. 357-363 ◽  
Author(s):  
Akira Miyazaki ◽  
Teruo Takeuchi ◽  
Hitomi Nakamura ◽  
Yoshinori Yamamoto ◽  
Fumitake Kubota
2003 ◽  
Vol 72 (4) ◽  
pp. 424-430 ◽  
Author(s):  
Takuya HIROSE ◽  
Akira MIYAZAKI ◽  
Kiyomi HASHIMOTO ◽  
Yoshinori YAMAMOTO ◽  
Tetsushi YOSHIDA ◽  
...  

2009 ◽  
Vol 170 (2-3) ◽  
pp. 791-797 ◽  
Author(s):  
P.C. Abhilash ◽  
Vimal Chandra Pandey ◽  
Pankaj Srivastava ◽  
P.S. Rakesh ◽  
Smitha Chandran ◽  
...  

Author(s):  
Karla Kasihta JAYA ◽  
Benyamin LAKITAN ◽  
Siti Masreah BERNAS

Wetland areas in Indonesia cover more than 33,3 million hectares, and slightly less than 40 % is inland swamp. During the rainy season, for up to 9 months annually, the wetlands are flooded, and no conventional agricultural activities can be done by local farmers. However, this condition can be seen as an opportunity to employ floating culture system. The objective of this research was to evaluate responses of leaf celery to floating culture system with different depths of water-substrate interface and NPK-fertilizer application. The results of this study indicated that the depth of water-substrate interface (WSI) should be maintained between 1 to 3 cm. At less than 1 cm, continuous contact between the water surface and the bottom part of the substrate cannot be ensured; meanwhile, aerobic substrate volume was reduced and caused significant effects on growth and yield in celery plants if WSI was deeper than 3 cm. Moreover, the effectiveness of NPK-fertilizer application was weakened if the depth of WSI was at 6 cm. Fresh leaf yield in celery plants harvested at 45 days after transplanting (DAT) can be predicted as early as 3 weeks earlier using the midrib length of the largest leaf or plant height as a predictor measured at 26 DAT. HIGHLIGHTS Depth of water-substrate interface (WSI) should be maintained between 1 to 3 cm for better growth and higher yield in floating culture system Effects of NPK fertilizer application diminished if WSI deeper than 3 cm Yield of celery harvested at 45 days after transplanting can be predicted as earlier as 3 weeks using midrib length of the largest leaf or plant height as predictor GRAPHICAL ABSTRACT


1997 ◽  
Vol 66 (2) ◽  
pp. 325-326 ◽  
Author(s):  
Akira MIYAZAKI ◽  
Shinji TOKUDA ◽  
Waichi AGATA ◽  
Fumitake KUBOTA ◽  
Xiangfu SONG

2008 ◽  
Vol 18 (3) ◽  
pp. 389-392 ◽  
Author(s):  
Szu-Chin Peng ◽  
Iou-Zen Chen ◽  
Cheng-Yung Cheng

In this study, we built a floating culture system, which could improve the rooting percentage of stem cuttings of taiwanese wild grape (Vitis thunbergii). We took softwood cuttings instead of hardwood cuttings and tested the effects of cutting type, medium type, and auxin concentration on the rooting percentage. In the first experiment, single leaf cuttings (SLC) in 26 °C circulating water (CW26) produced 82% rooting as compared with 48% rooting in the subirrigation medium [SM (3 horticultural perlite : 2 peatmoss, by volume)]. The highest rooting percentage of 88% occurred in 30 °C circulating water (CW30). The same trend was also observed in terminal cuttings (TC) with 62% rooting in CW26 compared with 27% in SM. The highest rooting percentage of 83% occurred in CW30. Besides having the highest rooting percentage, TC and SLC in CW30 formed adventitious roots 7 and 9 d earlier than in 22 °C circulating water (CW22). In the second experiment, SLC in 1.25 μm 1-naphthalenacetic acid (NAA) solution produced 92% rooting as compared with 82% rooting in the untreated group. In addition, SLC in all NAA solution treatments formed adventitious root 6 d earlier than in the untreated group. Based on these results, we suggest that the floating culture system is a practicable system for the clonal propagation of taiwanese wild grape.


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