水肥耦合对寒地粳稻养分吸收的影响

Effect of Water and Fertilizer Coupling on Nutrients Absorption of Japonica Rice in Cold Region

为了研究水肥耦合对寒地粳稻养分吸收的影响,以寒地粳稻东农428为试验材料,设置控灌方式、氮肥水平2因素处理,研究了水肥耦合对寒地粳稻养分吸收,以及对最终产量的影响。结果表明:两种灌溉模式均在N3处理下水稻含氮量,含磷量以及含钾量最高,且产量达最大值;而在N3处理下的两种灌溉模式相比较,在节水灌溉(W1)水平下水稻产量最高,且氮、磷、钾含量都处于最高水平,说明N3是水稻增产最佳施氮水平,节水灌溉较常规灌溉促进了产量的积累。

In order to study the effect of water and fertilizer coupling on nutrients absorption for japonica rice in cold region,Dongnong428 was used as experimental material, and two factor treatments, control irrigation and nitrogen levels were set up to study the effect of water and fertilizer coupling on nutrients absorption and yield of japonica rice in cold region. The results showed that when the two irrigation modes under the N3 treat- ments,the N,P,K content of the rice were all high,and the yield reached the highest value; but when the two irrigation modes compared under the N3 treatment,the N,P,K content of the rice were all high,and the yield reached the highest value under the W1 ,it indicated that N3 was the optimum nitrogen levels in rice yield wa-- ter-saving irrigation that conducive to the accumulation of yield,compared with conventional irrigation.