Breeding for an alternative wheat ecoideotype to the southern brazilian region
Alternatives to cropping during winter season are the main focus to improvement of conventional crop systems in South Brazilian Region including main crop areas of Rio Grande do Sul,Santa Catarina,and Paraná states.Although is known which realistic system to recover the primary physical, chemical and biological soil fertility on extensive crop areas such as south brazilian crop systems must be based on mixed system ( crop‐livestock systems) using perennial pastures as modern conception systems used on tropical brazilian regions including grass pasture compound by Brachiaria species.In the South Brazil agricultural system have a very well annual rainfall distribution with more than 1500 mm, allow two harvest/year, soybean /follow /corn /wheat is the main farming system.In Rio Grande do Sul state is growing soybean (3.5 millions ha), corn (1.4 million ha), rice (1.1 million ha), and wheat (0.8 million ha), barley (0.1 million ha), and oat (0,05 million ha).Thus researchers are looking specially new winter economic alternatives because at this moment only 20％ of area used during summer season is cultivated with grain crops.On the other hand is observed an increase dairy and beef operations, specially on small holder farms (family agriculture farms) with no more than 20 ha, that is impossible to get enough revenue growing only grain crops.So year‐round soil protection with permanent green or crop residues is desirable to no tillage system sustainability.Ancient results identified on region showed high yield potential in earlier seeding of small grain species, nevertheless the available cultivars have short cycle, resulting in increase frost risk at flowering.
BRS Figueira BRS Umbu BRS Guatambu BRS Taruma
E.Caierao Ren.S.Fontaneli Rob.S.Fontaneli L.de J.A.Del Duca
National Wheat Research Center,Brazilian Agricultural Research Corporation(Embrapa Trigo) PO Box 451 Universidade de Passofundo/CEPA-FA MV-U PF,99001-970 Passofundo,RS,Brazil
国际会议
呼和浩特
英文
2008-06-29（万方平台首次上网日期，不代表论文的发表时间）