Abstract A study was conducted to evaluate different doses of Zn and B along with their application schedule for the component crops in potato-rice-rice pattern in floodplain soil. The experimental layout was Randomized Complete Block Design with 3 replications. As treatment, zinc and boron were applied to the component crops of the pattern in different distributions so that their direct, residual and cumulative effects could be estimated. Other nutrients i.e., N, P, K and S were used equally at recommended rates for all plots. In such a 3-crop pattern, application of 4.0 kg Zn ha−1 and 1.5 kg B ha−1 at a time to the first crop or 2.0 kg Zn ha−1 to each of the first two crops along with 1.5 kg B ha−1 to the first crop was found sufficient to achieve satisfactory yield, system productivity, nutrient uptake by crops, and protein and Zn concentrations of crop produce. Zinc and boron containing fertilizers need not to apply in each of the component crops of a cropping pattern potato-rice-rice in floodplain soil. Each fourth crop is essential to be fertilized with 4.0 kg Zn ha−1 and 1.5 kg B ha−1.

中文翻译：

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洪泛区土壤马铃薯-水稻-水稻模式锌硼肥直接、残留和累积剂量的选择

摘要 进行了一项研究，以评估不同剂量的锌和硼及其在漫滩土壤中马铃薯-水稻-水稻模式的组成作物上的施用时间表。实验布局是具有 3 个重复的随机完整区组设计。作为处理，锌和硼以不同的分布应用于模式的组成作物，以便可以估计它们的直接、残留和累积影响。其他养分，即 N、P、K 和 S，在所有地块中均以推荐的比例使用。在这样的 3 种作物模式中，第一批作物一次施用 4.0 kg Zn ha-1 和 1.5 kg B ha-1，或前两种作物中的每批施用 2.0 kg Zn ha-1 以及 1.5 kg B ha-1 -1 被发现足以达到令人满意的产量、系统生产力、作物的养分吸收，以及作物产品的蛋白质和锌浓度。洪泛区土壤中马铃薯-水稻-水稻种植模式的每个组成作物中不需要施用含锌和硼的肥料。每第四种作物都必须用 4.0 kg Zn ha-1 和 1.5 kg B ha-1 施肥。