Abstract:

【Objective】 In order to reveal the regulating effects of water and nitrogen forms on paste traits of starch of weak gluten wheat variety Yumai50 and filtrate the feasible treatment which the starch quality of weak gluten wheat could be better advanced. 【Method】 A field experiment was conducted from 2004 to 2005, two elements including water (three levels) and nitrogen (three forms) were conducted to study the effects of water and nitrogen forms on starch yield and starch paste traits of weak gluten wheat variety Yumai50. 【Result】 The improving effects of raised irrigation and applied NH4+-N on starch yields were effective, the main viscosity parameters with W1 treatment were better than that with W2 and W3 treatment, the value of PT and BD was N3＞N1＞N2, and the value of PV, TV, SB and FV was N2＞N1＞N3. In view of the interaction of water and nitrogen forms, the values of PV, TV, SB and FV were the highest and the value of PT and BD was the lowest in jointing stage irrigation and NO3--N application treatment among all the water and nitrogen forms treatments, and there was only a certain viscosity index needs to be improved in other treatments. 【Conclusion】 The regulating and controling effects of different water and nitrogen forms treatments on starch yield and starch paste traits in weak gluten wheat variety Yumai50 were effective. Starch yield was highest with irrigation at jointing stage, booting stage, filling stage and NH4+-N application treatment, but the starch paste traits were most excellent in irrigation at jointing stage and NO3--N application treatment.

Key words: common water, nitrogen forms, weak gluten wheat variety, starch pasting properties