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- W4231992014 abstract "Oat (Avena sativa L.) is a small but important grain cereal and forage crop. Presently, world oat production ranks sixth after maize (Zea mays L.), rice (Oryza sativa L.), wheat (Triticum aestivum L.), barley (Hordeum vulgare L.), and sorghum (Sorghum bicolor L.). The rank has remained in the same position during the past 30 years, even though the area of oat crop production has declined dramatically over the past six decades. Historically, oat has been primarily used as a forage crop. Oat is unique amongst grain cereals because it is a rich source of dietary fibre, low in calories, and has the highest protein content, ranging from 15% to 20% of the groat weight. Owing to the discovery of the association between human consumption of whole oat sources and a reduced risk of coronary heart disease, oat has gained new momentum to increase production since 1990s. In most production countries, oat is usually cultivated in areas not optimal for wheat and barley, with less input. Production of high yields and good grain quality of oat does require sufficient water and nutrients that are provided in timely and balanced combinations to increase radiation use efficiency. Therefore both oat cultivar improvement and management strategies are required to achieve concurrent improvement in yield and grain quality and in resources use efficiency, particularly water and nitrogen (N) use efficiency. The productivities of solar radiation and soil water are mediated by plant nutrients, as exemplified by N. Appropriate supply of N fertiliser can quickly increase leaf area, leaf area duration, and leaf N content, all of which improve crop photosynthesis. Proper N management can also modulate soil water use before and after anthesis in water-limited environments. The critical stage at which oat crops are sensitive to drought and other abiotic stresses appear to be from jointing to shortly after anthesis. Amongst the yield components, seeds m− 2 or seeds panicle− 1 appear to be the determining factor of yield. Similar to other cereals, there is a negative association between yield and water-soluble carbohydrates in shoot; the latter is also negatively correlated with shoot N concentration. Consequently, selection against water-soluble carbohydrates could improve yield potential, but residual labile carbohydrates can also be exploited in dual grain-feed varieties to provide flexibility for hay growers. In this chapter, we aim to synthesise new knowledge of oat crop physiology and agronomy arising from advances across disciplines in the context of classical theoretical principles." @default.
- W4231992014 created "2022-05-12" @default.
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- W4231992014 date "2021-01-01" @default.
- W4231992014 modified "2023-10-18" @default.
- W4231992014 title "Oat" @default.
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