论文部分内容阅读
由于农业上长期、大量施用只含大量营养元素的化肥,一些作物微量元素的缺素症状已明显地显现出来,如玉米的“花叶病”、水稻的“缩苗病”、甜菜的“心腐病”等。第2次土壤普查结果表明,赤峰地区土壤中,作物必须的微量元素锌、硼的含量比较低,明显地影响着作物的生长发育和产量。
Due to the agricultural long-term, large-scale application of fertilizers containing only a large number of nutrients, the deficient symptoms of trace elements in some crops have been clearly manifested, such as “mosaic disease” in maize, “seedling disease” in rice, Rot "and so on. The results of the second soil survey showed that the content of trace elements, zinc and boron, required for crops in the soil of Chifeng area was relatively low, which obviously affected crop growth and yield.