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文章探讨了根外喷施不同浓度锌肥对水稻糙米锌含量的影响。结果表明：（1）锌肥喷施最佳时期因浓度而不同，低浓度（≤2×10-4mol．L-1）在抽穗至灌浆期喷施均可；高浓度（＞2×10-4mol．L-1）宜在灌浆期喷施效果较好。（2）喷施锌肥的浓度以1×10－4～2×10－4mol．L-1为宜，浓度达到2×10-4mol．L-1以上会显著降低结实率。（3）糙米中铜含量与锌含量呈显著负相关，随着锌含量的提高，铜含量显著降低。糙米中铁含量与锌含量无相关。
The article discussed the effect of spraying zinc fertilizer with different concentrations on the zinc content in brown rice. The results showed that: (1) The optimum time for zinc fertilizer application was different due to different concentrations, and low concentration (≤2 × 10-4mol.L-1) 4mol.L-1) should be sprayed at the filling stage is better. (2) spraying zinc fertilizer concentration of 1 × 10-4 ~ 2 × 10-4mol. L-1 is appropriate, the concentration of 2 × 10-4mol. L-1 will significantly reduce the seed setting rate. (3) The content of copper in brown rice was negatively correlated with the content of zinc, and the content of copper decreased significantly with the increase of zinc content. The content of iron in brown rice has nothing to do with zinc content.