scholarly journals Studies on the Growth of Rice Plants Cultivated in Different Seasons. : II. Changes of water- and soil temperature and oxidation potentials in paddy fields, and root development of rice plants.

1959 ◽  
Vol 27 (3) ◽  
pp. 337-340
Author(s):  
Keichi SAMOTO ◽  
Hiroshi SUGA ◽  
Isamu YAMAKAWA ◽  
Kaichiro SUZUKI
Keyword(s):  
Soil Temperature ◽  
Root Development ◽  
Paddy Fields ◽  
Rice Plants ◽  
Oxidation Potentials ◽  
Different Seasons

Speciation and Degradation of Triphenyltin in Typical Paddy Fields and Its Uptake into Rice Plants

2011 ◽  
Vol 45 (24) ◽  
pp. 10524-10530 ◽  
Author(s):  
Fabiane G. Antes ◽  
Eva Krupp ◽  
Erico M. M. Flores ◽  
Valderi L. Dressler ◽  
Joerg Feldmann
Keyword(s):  
Paddy Fields ◽  
Rice Plants

Behaviour of Iodine-129 in Rice Paddy Fields

1994 ◽  
Vol 353 ◽  
Author(s):  
Shigeo Uchida ◽  
Yasuyuki Muramatsu
Keyword(s):  
Soil Solution ◽  
Root Zone ◽  
Brown Rice ◽  
Iodine Concentration ◽  
Rice Paddy ◽  
Paddy Fields ◽  
Transfer Factors ◽  
Rice Plants ◽  
Continuous Deposition ◽  
Gray Lowland Soil

AbstractTransfer factors of iodine from soil to rice were obtained by laboratory experiments using 125I tracer. Two typical soil types in Japan, Andosol and Gray lowland soil, were used. The transfer factor (TF) is defined as ’concentration of the nuclide in a plant organ at harvest’ divided by ’concentration of the nuclide in dry soil’. The TFs for brown (hulled) rice were 0.006 for Andosol and 0.002 for Gray lowland soil. The TFs for different organs of rice plants decreased in the order of blade > stem > rachis > unhulled rice >> brown rice.The concentration of iodine in soil solution under flooded conditions varied with time during cultivation. The iodine concentration in rice plants seemed to be influenced by the soil solution.The effect of removal of 1–129 from paddy fields by harvesting rice plants was also modelled. Even assuming continuous deposition of 1–129 onto the field, annual harvesting of the blades and stems of rice plants could effectively reduce the amount of the nuclide in the root zone.

Temporal changes of radiocesium in irrigated paddy fields and its accumulation in rice plants in Fukushima

2016 ◽  
Vol 208 ◽  
pp. 562-570 ◽  
Author(s):  
Baolu Yang ◽  
Yuichi Onda ◽  
Yoshifumi Wakiyama ◽  
Kazuya Yoshimura ◽  
Hitoshi Sekimoto ◽  
...  
Keyword(s):  
Temporal Changes ◽  
Paddy Fields ◽  
Rice Plants

scholarly journals Growth and Development of Stevia Cuttings During Propagation with Hormones in Different Months of the Year

Plants ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 294
Author(s):  
Ma Claudia Castañeda-Saucedo ◽  
Ernesto Tapia-Campos ◽  
Jessica del Pilar Ramírez-Anaya ◽  
Jaqueline Beltrán
Keyword(s):  
Root Development ◽  
Dry Weight ◽  
Growth Hormones ◽  
Shoot Biomass ◽  
Total Biomass ◽  
Different Seasons ◽  
Number Of Leaves ◽  
Growth Development ◽  
Set Up ◽  
Leaf Dry Weight

Stevia is an important non-caloric sweetener that has health-beneficial properties. The objective is to evaluate growth, development, and rooting of stevia plants during different seasons of the year using growth hormones. Eight experiments were set up in Ciudad Guzman, Jalisco, Mexico, with three treatments (T): T1, indol-3 butyric acid (IBA) 7.4 mM; T2, alphanaphthylacetamide (ANA) 6.4 mM + IBA 0.3 mM; and T3, control. The variables evaluated were rooted plantlets, plant height, root length, number of leaves, stem diameter, leaf dry weight, stem dry weight, root dry weight, leaf area, shoot biomass, total biomass, as well as development and growth indexes. Four samplings were conducted in each experiment. The results show that the most appropriate months for propagating stevia cuttings are February, March, April, May, and July, when 96% to 99% of the cuttings rooted. The hormones had the best results related to production of root development. The control was outstanding only in variables related to production of shoot biomass and not to root development. It is concluded that stevia can be propagated vegetatively using cuttings treated with IBA 7.4 mM or ANA 6.4 mM + IBA 0.3 mM, preferable in the period from February to July, with the exception of June.

scholarly journals Yields from Rice Plants Cultivated under Tree Canopies in Rainfed Paddy Fields on the Central Plain of Laos

2013 ◽  
Vol 16 (4) ◽  
pp. 325-334 ◽  
Author(s):  
Shuichi Miyagawa ◽  
Maki Seko ◽  
Mari Harada ◽  
Sengdeaune Sivilay
Keyword(s):  
Paddy Fields ◽  
Rice Plants ◽  
Central Plain ◽  
Tree Canopies

Effects of loosing Aigamo ducks on the growth of rice plants, weeds, and the number of arthropods in paddy fields

2007 ◽  
Vol 7 (1) ◽  
pp. 38-43 ◽  
Author(s):  
SEISHU TOJO ◽  
MASAHIRO YOSHIZAWA ◽  
TAKASHI MOTOBAYASHI ◽  
KENGO WATANABE
Keyword(s):  
Paddy Fields ◽  
Rice Plants

scholarly journals Pengembangan Prototipe Dan Pengujian Traktor Satu Roda Untuk Pemeliharaan Tanaman Padi

2020 ◽  
Vol 7 (2) ◽  
pp. 147-154
Author(s):  
Jusran Jusran ◽  
Radite Praeko Agus Setiawan ◽  
I Dewa Made Subrata
Keyword(s):  
Paddy Field ◽  
Performance Test ◽  
Paddy Fields ◽  
Rice Plants

Most of paddy fields in Indonesia are not consolidated, therefore, soil hardpan usually did not exist.  With no soil hardpan, mobility of any machine for crop maintenance is very difficult even in some places is almost impossible.Until now crop maintenance such as weeding, spraying and spreading fertilizer was done manually by labor. Then mechanization is required to replace the labour which is not available or very expensive. Hence, this study conducted with objective to make a prototype II of a single wheel tractor  for crop maintenance operated in deep mud field or in an unconsolidated paddy field. The study also did performance test of a single wheel tractor to measure the tractor speed, traction, sinkage, and slip of wheel  when operated in rice plants field. The results of performance test showed that the speed average of wheel with straight lug and curved lug were 1.15km/hour and 0.97 km/hour. The average of sinkage and slip both of wheels with straight lug and curved lug respectively were 24.8 cm, 25.9 cm and 38.7 %, 26.12%. The results of performance test olso showed that the traction average of wheel with straight lug and curved lug respectively were 45.8 kg and 41.5 kg

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