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Effects of Soil Moisture and Fertilization Treatments on the Agronomic Traits of Teff (<i>Eragrosis tef</i>) in Southern Kyushu, Japan

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Agricultural Sciences 2015年第9期6卷 1003-1013页

作者： Sachiko Idota Yasuyuki Ishii kiichi fukuyama Faculty of Agriculture University of Miyazaki Miyazaki Japan

This study investigated the agronomic characteristics of pot-cultured teff (Eragrostis tef) under soil moisture and fertilization treatments in southern Kyushu, Japan. In experiments examining the effects of soil moisture and fertilization, growth of teff and Setaria (Setaria sphacelata) as a reference species was compared under six treatments combining two soil moisture regimes, control (C) and high moisture (H) treatment, and three fertilizer applications, chemical fertilizer with manure (CF + M), chemical fertilizer (CF) and doubled level of manure (DM). H treatment did not decrease dry matter yield in teff two months after transplanting, except when combined with CF + M, compared with a decreasing tendency in Setaria. Top and underground dry matter yields and harvest index in teff increased significantly (P -2);6.2 gN m-2 is the standard level in the USA. Dry matter yield in teff did not differ significantly (P > 0.05) at CF application levels above 6.2 gN m-2 two months after sowing, suggesting that the optimum CF level of teff in southern Kyushu was comparable with that in the USA, and that teff had potential as an early-harvest forage crop two months after planting to replace summer forage in paddy fields of this region.

关键词： Chemical Fertilizer Eragrosis tef Setaria sphacelata Soil Moisture Regime Manure

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C4-Napier Grass Cultivation for Cadmium Phytoremediation Activity and Organic Livestock Farming in Kyushu, Japan

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Journal of Agricultural Science and Technology(A) 2013年第4期3卷 321-330页

作者： Yasuyuki Ishii Kotomi Hamano Dong Jin Kang Rengsirikul Kannika Sachiko Idota kiichi fukuyama Aya Nishiwaki Department of Animal and Grassland Sciences Faculty of Agriculture University of Miyazaki Miyazaki Miyazaki 889-2192 Japan Graduate School of Agriculture University of Miyazaki Miyazaki Miyazaki 889-2192 Japan Teaching and Research Center for Bio-coexistence Hirosaki University Goshogawara A omori 037-0202 Japan Faculty of Agricultural Technology Valaya AIongkorn Rajabhat University KIongluang Prathumthani Province 13180 Thailand

Napier grass （Pennisetum purpureum Schumach）, a C4 tropical plant, has high dry matter productivity and sustainability without the need for renovating every year due to good overwintering ability and the absence of serious pathogens or insects injury. This grass is suitable for multipurpose use, providing forage, bioethanol feedstock and phytoremediation of cadmium （Cd） contaminated soil in Kyushu, Japan. When two cultivars of Napier grass （Wruk wona, WK and Merkeron, ME） were grown in Cd-contaminated soils, dry matter yield and the concentration and uptake of herbage Cd were higher in WK than in ME, and soil Cd concentration was reduced by 14% in a single season of cultivation. A dwarf variety of late-heading type （DL）, Napier grass had superior sustainability for more than 5 years in Miyazaki, Japan, and has gradually increased in cultivation areas for both cut-and-carry and grazing herbage production in cooperation with regional communities. Through the extension in several Kyushu areas, DL Napier grass required temperatures above -6.2 ~C for sustainability in winter, based on its threshold response to the lethal minimum temperature. DL Napier grass pasture can be utilized by grazing beef cattle even in early spring with temperate Italian ryegrass inter-sown into its inter-row spaces. Organic digested animal manure or sun-dried leguminous leaves as green manure can replace chemical fertilizers to reduce energy consumption and allow comparable productivity.

关键词： Cadmium Napier grass organic farming phytoremediation

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