仪征市土壤有效锌含量空间分布及水稻施锌效果研究

Spatial Distribution and Effect of Available Zinc in Soil in Yizheng

2012年仪征市土壤有效锌普查结果表明，仪征市土壤有效锌含量在0．35-8．31mg/kg之间，平均为1．04mg／kg，属中等水平。通过试验研究表明，在土壤有效锌含量中等水平下，水稻施锌有一定的增产效果，最高增产幅度达15％。增产原因主要是锌肥能促进分蘖，增加有效穗。锌肥的最佳用量为1．2k-667m^2，在这一范围内，增产幅度产量随用量增加而提高，超出一定的施用量时产量增幅会下降。

The general survey of available zinc were made in Yizheng in 2012, the result indicated that content of available zinc was from 0.35 mg/kg-8.31 mg/kg（averaged about 1.04 mg/kg） and it was medium level The test indicated that zinc can increase yield which the highest increase being 15% under medium level of available zinc in soil, the reason of increase yield was that zinc can promote tillering and increase the effective panicles, the optimum amount was 1.2 kg/667 m^2, in this scope, incremental range can increased with the increase of zinc, beyond the range, the incremental range would decline.