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江苏省灌南县地处淮、沭、泗、沂河最下游,属黄泛冲积平原,土壤碳酸钙含量在8～15%,pH 值为8.1～8.4。由于土壤中有效锌含量仅有0.22～0.31 ppm,全县10万亩左右的水稻田虽然施了较多的氮、磷化肥,但仍然僵苗不发。对此,我们施用多效锌肥(扬州市农科所、土肥站与邗江化工厂共同研制的,含有效锌10%、有效硅8%以上及少量铜、锰等微量元素),获得了极显著的增产效果。
Guannan County, Jiangsu Province is located in Huaihe, Shu, Si, Yi River, the most downstream, is a yellow pan-alluvial plain, soil calcium carbonate content of 8 to 15%, pH value of 8.1 to 8.4. Due to the effective zinc content in the soil is only 0.22 ~ 0.31 ppm, the paddy field of about 100,000 mu in the whole county is fertilized with more nitrogen and phosphorus fertilizer, but the seedlings are still stiff and seedless. In this regard, we apply a multi-effect zinc fertilizer (Yangzhou Agricultural Research Institute, Soil Fertilizer Station and the chemical plant jointly developed Qi Jiang, containing 10% effective zinc, more than 8% of available silicon and a small amount of copper, manganese and other trace elements) Significant stimulation effect.