Optimizing nutrient management for various potato varieties based on source-sink relationships

文献类型： 外文期刊

第一作者： Wan, Weiyan

作者： Wan, Weiyan;Wu, Qiying;Qu, Xiaojin;Wang, Xiya;He, Ping;Zhan, Jun;Duan, Yu

作者机构：

关键词： Potato; Variety; Yield; Quality; Source-sink relationship

期刊名称：FIELD CROPS RESEARCH （ 影响因子：6.4； 五年影响因子：6.6 ）

ISSN： 0378-4290

年卷期： 2025 年 333 卷

页码：

收录情况： SCI

摘要： Context: Potato yield and quality are largely determined by the balance between assimilate production (source) and storage (sink), yet the variation in source-sink dynamics across different varieties and the specific effects of mineral nutrients are not well understood. Methods: This study aimed to address these gaps through field experiments conducted in 2021 and 2022 with three potato varieties: "Lucinda" (fresh consumption), "Mailken1" (frying processing), and "Dongnong310" (starch processing). The varieties were subjected to five fertilizer treatments: farmers' practice (FP: 250-113-113 kg N-P2O5-K2O ha-1), Nutrient Expert (R)-based fertilizer recommendation (NE: 210-100-200 kg N-P2O5-K2O ha-1), and three nutrient omission treatments (NE-N, NE-P, and NE-K) based on the NE recommendation. Results: The results showed that Dongnong310 exhibited higher source supply, sink demand, and sink-source differences compared to Lucinda and Mailken1. Despite limited source supply, all varieties showed strong sink demand, suggesting that yield formation was primarily constrained by source availability. Compared to FP, the NE treatment resulted in increased tuber yield across all varieties. Partial least squares structural modeling (PLS-SM) revealed that excessive nitrogen input reduced starch content, high phosphorus inhibited the accumulation of reducing sugars, and increased potassium enhanced both reducing sugar and VC content. Conclusion: The nutrient management adjustments using Nutrient Expert (R) for different intended uses: increasing potassium for fresh consumption varieties, moderately raising phosphorus while reducing potassium for frying processing varieties, and reducing nitrogen for starch processing varieties. Implication or significance: These insights provide a framework for implementing nutrient management strategies tailored to optimize potato production for specific intended uses.

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