Mechanism of Accumulation of Methylmercury in Rice (Oryza sativa L.) in a Mercury Mining Area

The purposes of this research were to determine the income of wetland paddy farming in inside and outside of mining area and to compare both of them. This research was conducted from August to October 2018 in minning area of PT. Multi Harapan Utama, Jonggon Jaya Village, Loa Kulu Subdistrict. Data collection was done through direct interview toward 33 respondents. Data was analyzed to count income and to do t test. The result of this research showed that the average income of wetland paddy farming in inside mining area was IDR12,049,299.99 ha-1ps-1 while the average income of wetland paddy farming in outside mining area was IDR10,663,654.70 ha-1ps-1. Income of wetland paddy farming in inside mining area was bigger than that in outside mining area based on tcount > ttable (3.637 > 2.039).

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Stable Mercury Isotope Variation in Rice Plants (Oryza sativa L.) from the Wanshan Mercury Mining District, SW China

Environmental Science & Technology ◽

10.1021/es304302a ◽

2013 ◽

Vol 47 (5) ◽

pp. 2238-2245 ◽

Cited By ~ 105

Author(s):

Runsheng Yin ◽

Xinbin Feng ◽

Bo Meng

Keyword(s):

Oryza Sativa ◽

Oryza Sativa L ◽

Mining District ◽

Mercury Isotope ◽

Sw China ◽

Rice Plants ◽

Isotope Variation ◽

Mercury Mining

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Elemental bioimaging of tissue level trace metal distributions in rice seeds (Oryza sativa L.) from a mining area in China

Environmental Pollution ◽

10.1016/j.envpol.2014.08.017 ◽

2014 ◽

Vol 195 ◽

pp. 148-156 ◽

Cited By ~ 25

Author(s):

Priyanka Basnet ◽

Dulasiri Amarasiriwardena ◽

Fengchang Wu ◽

Zhiyou Fu ◽

Tao Zhang

Keyword(s):

Oryza Sativa ◽

Trace Metal ◽

Oryza Sativa L ◽

Mining Area ◽

Tissue Level ◽

Rice Seeds

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Methylmercury in rice (Oryza sativa L.) grown from the Xunyang Hg mining area, Shaanxi province, northwestern China

Pure and Applied Chemistry ◽

10.1351/pac-con-11-09-16 ◽

2011 ◽

Vol 84 (2) ◽

pp. 281-289 ◽

Cited By ~ 19

Author(s):

Guangle Qiu ◽

Xinbin Feng ◽

Bo Meng ◽

Xun Wang

Keyword(s):

Oryza Sativa ◽

Oryza Sativa L ◽

Ambient Air ◽

Mining Area ◽

Northwestern China ◽

Guizhou Province ◽

Shaanxi Province ◽

Mass Balance Calculation ◽

Polished Rice ◽

Hg Mining

Mercury (Hg) is a global pollutant and can transform into methylmercury (MeHg), a highly toxic and bioaccumulative organic form. Recent surveys showed that rice (Oryza sativa L.) rather than fish is the main source of human MeHg exposure in Hg mining and retorting regions in Guizhou province, southwestern China, where rice is a traditional staple food. Here we report that MeHg in rice grown at an active Hg mining and retorting region in Shaanxi province, northwestern China, characterized with different climate compared to Guizhou, contained levels up to 240 μg kg–1 MeHg in bran, 78 μg kg–1 MeHg in polished rice, and 30 μg kg–1 MeHg in hull, respectively. Although the polishing process may reduce MeHg content, the mass balance calculation showed that greater than 50 % of total MeHg mass can be observed in white rice (polished rice). The ongoing Hg retorting activities, which account for the high levels of ambient air Hg, result in high levels of MeHg in rice grains. Our results further demonstrate that the accumulation of MeHg is a common feature of rice.

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Keragaan Morfologi dan Kandungan Antosianin Padi Beras Merah (Oryza sativa L.) di Kecamatan Munte dan Kecamatan Payung, Kabupaten Karo

Jurnal Pertanian Tropik ◽

10.32734/jpt.v5i3.3106 ◽

1970 ◽

Vol 5 (3) ◽

pp. 391-403

Author(s):

Wiwik Winarti ◽

Eva Sartini Bayu ◽

Revandy Iskandar Damanik

Keyword(s):

Oryza Sativa ◽

Oryza Sativa L ◽

International Rice Research Institute ◽

Research Institute

Keragaan morfologi dan kandungan antosianin padi beras merah (Oryza sativa L.) pada Kecamatan Munte dan Kecamatan Payung di Kabupaten Karo. Penelitian ini bertujuan untuk mendapatkan informasi morfologi dan kandungan antosianin padi beras merah (Oryza sativa L.). Penelitian ini dimulai dari Juni 2017dan selesai pada Januari 2018 di kecamatan Munte dan Kecamatan Payung Kabupaten Karo.Metode survei deskriptif menggunakan panduan International Rice Research Institute (IRRI). Teknik penentuan lokasi secara sengaja dan pengamblan sampel secara kebetulan.Uji kandungan antosianin menggunakan metode analitik dengan menghomogenkan sampel. Hasil eksplorasi didapatkan 72 genotipe yang dibagi menjadi tiga lokasi lahan. Berdasaran uji kandungan antosianin didapatkan lahan A memiliki kandungan tertinggi yaitu 0,5 mg/100 g dan terendah yaitu lahan B 0,08 mg/100 g.

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Efficacy of some insecticide modules against major insect pests and spider population of rice, Oryza sativa L.

ENTOMON ◽

10.33307/entomon.v43i4.405 ◽

2018 ◽

Vol 43 (4) ◽

pp. 257-262

Author(s):

Atanu Seni ◽

Bhimasen Naik

Keyword(s):

Oryza Sativa ◽

Grain Yield ◽

Untreated Control ◽

Insect Pests ◽

Oryza Sativa L ◽

Gall Midge ◽

Stem Borer ◽

The Other ◽

The Third ◽

Treated Plot

Experiments were carried out to assess some insecticide modules against major insect pests of rice. Each module consists of a basal application of carbofuran 3G @ 1 kg a.i ha-1 at 20 DAT and Rynaxypyr 20 SC @ 30 g a.i ha-1 at 45 DAT except untreated control. All modules differ with each other only in third treatment which was applied in 65 DAT. The third treatment includes: Imidacloprid 17.8 SL @ 27 g a.i ha-1, Pymetrozine 50 WG @ 150 g a.i ha-1, Triflumezopyrim 106 SC @ 27 g a.i ha-1, Buprofezin 25 SC @ 250 g a.i ha-1; Glamore (Imidacloprid 40+Ethiprole 40% w/w) 80 WG @ 100 g a.i. ha-1, Thiacloprid 24 SC @ 60 g a.i ha-1, Azadirachtin 0.03 EC @ 8 g a.i ha-1, Dinotefuran 20 SG@ 40 g a.i ha-1 and untreated control. All the treated plots recorded significantly lower percent of dead heart, white ear- head caused by stem borer and silver shoot caused by gall midge. Module with Pymetrozine 50 WG @ 150 g a.i ha-1 treated plot recorded significantly higher per cent reduction of plant hoppers (>80% over untreated control) and produced higher grain yield (50.75 qha-1) than the other modules. Among the different treated modules the maximum number of spiders was found in Azadirachtin 0.03 EC @ 8 g a.i ha-1 treated module plot followed by other treatments.

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