长年旱地,无论其成土母质为第四纪红色粘土、紫色砂页岩或河流冲积物,一旦改为水田,种植水稻往往产生奇颖空壳病害,引起水稻减产。特别是在第一年发生奇颖空壳量最多,第二年较少,到第三年才渐少以至消失。为了探明产生奇颖空壳的原因及防治措施,我们从1978年开始了这方面的试验,现将结果整理报告如下。 For a long time in the dry land, no matter the parent material of its parent is Quaternary red clay, purple sandstone or river alluvial material, once it is changed into paddy field, planting rice often produces Qiying shell disease and causes the rice to cut down. In particular, in the first year, the volume of Qi Ying’s shell was the largest, the second year was smaller, and the third year was less or even disappeared. In order to find out the causes and preventive measures for the production of QIYU shell, we started the experiment in this field from 1978, and the results are summarized as follows.