Abstract:

Effects of irrigation regimes on grain nutritional quality and yield of two different oat cultivars Neinongdayou 1 (Avena nuda L.) and Baiyan7 (Avena sativa L.) were tested under proof-rainfall pool culture condition. The results showed that the contents of grain crude protein, total phosphorus, Ca, Mg, Zn, Fe (P<0.01) and K (P<0.05) in Neinongdayou 1 were higher than those in Baiyan 7. Under the experimental condition, most of the tested quality indices, including the above indices and the contents of phytic acid and Cu, were significantly affected by irrigation treatment. Irrigation treatment C (irrigated averagely with 1 800 m³ hm^-2 in 3 times, before sowing + jointing + heading) or D (irrigated averagely with 2 400 m³ hm^-2 in 3 times, before sowing + tillering + jointing + heading) increased both grain yield and quality in oats. The interactions of cultivar by irrigation were significant for contents of protein, Ca, Mg, K, Zn, Fe, Cu, and Mn. The Regression equations indicated that irrigation quota had linear relations to grain total phosphorus and Cu contents, and quadratic relations to phytic acid, Ca, Mg, K, Zn, Mn contents in Neinongdayou1; and linear relations to grain Zn and Fe contents, and quadratic relations to phytic acid, total phosphorus, crude protein, Ca and Mg contents in Baiyan 7, respectively.

Key words: Avena sativa L., Avena nuda L., Irrigation regimens, Phytic acid, Protein, Mineral element