This study explored the response in grain yield and quality of upland and wetland rice varieties to a combination of zinc (Zn) and nitrogen (N) fertilizers under two water management regimes. A factorial arrangement based on a randomized complete block design composed of three factors was carried out with three independent replications. Upland and wetland rice varieties were grown with three fertilizer treatments; the optimum N rate (86 kg N ha −1 ) without Zn application, the optimum N rate with Zn (50 kg ZnSO 4 ha −1 ), and the high N rate (172 kg N ha −1 ) with Zn under waterlogged and well-drained conditions. Grain yield was 27% lower in the well-drained than in the waterlogged condition in wetland rice, while there was no effect in upland rice. Application of optimum N with Zn application produced the highest grain yield in upland rice, while yield was the highest in wetland rice in high N with Zn application. Upland rice grown in the well-drained condition with the optimum and high N with Zn treatments enhanced Zn concentration by 45% and 29% higher than the treatment without Zn, respectively, while it had no difference among three treatments in the waterlogged condition. Wetland rice variety grown under the well-drained condition in optimum and high N rate with Zn treatments were equally effective in improving grain Zn concentration at the average of 88% compared to the control. While rice grown under the waterlogged condition in the high N with Zn treatment had improved 92% the concentration. The optimum N rate with Zn application increased grain yield in upland rice, while the higher N input is required for wetland rice. Grain Zn concentrations of upland and wetland rice varieties were enhanced by applying Zn fertilizer; however, the increased level was depended on N application rate in the individual water condition.

中文翻译：

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旱涝和排水良好条件下旱地和湿地水稻品种产量和养分含量对锌氮复合肥的响应-【维普网】-仓储式在线作品出版平台-www.cqvip.com

本研究探讨了在两种水分管理制度下，结合锌 (Zn) 和氮 (N) 肥料对旱稻和湿地水稻品种的粮食产量和品质的响应。基于由三个因素组成的随机完整区组设计的因子安排进行了三个独立的重复。旱稻和湿地水稻品种采用三种施肥处理；不施锌的最佳施氮量 (86 kg N ha -1 )、含锌的最佳施氮量 (50 kg ZnSO 4 ha -1 ) 和高施氮量 (172 kg N ha -1 ) 在淹水和排水良好的条件。在排水良好的条件下，湿地水稻的籽粒产量比淹水条件下低 27%，而对旱稻没有影响。最适施氮配施锌的旱稻产量最高，而高氮施锌的湿地水稻产量最高。在最佳排水条件和高氮加锌处理的旱稻中，锌浓度比不加锌处理分别提高了 45% 和 29%，而在淹水条件下，三个处理之间没有差异。与对照相比，在最佳排水条件下以最佳和高施氮量和锌处理生长的湿地水稻品种在提高籽粒锌浓度方面同样有效，平均为 88%。而在淹水条件下生长的水稻在高氮和锌处理下的浓度提高了 92%。施锌的最佳施氮量提高了旱稻的产量，而湿地稻需要更高的施氮量。施用锌肥提高了旱稻和湿地水稻品种的籽粒锌含量；然而，增加的水平取决于个别水体条件下的施氮量。