论文部分内容阅读
在珠江三角洲一带,有肥沃沙田约400—500万亩,以生产水稻为主,是广东省重要粮食产区。但由于气候高温多湿,水稻虫害异常猖獗,特别是三化螟虫,一年内常发生4--5代,成为水稻生产的重大威协。1953年中山县为了进一步发挥沙田增产潜力,改双季间作稻为连作稻共约3万馀亩,但当年秋季三化螟虫集中为害连作晚稻,一般损失在20--40%,受害重的达到50%以上。这样就大大影响在发展中的间作改连作水稻增产措施的顺利推行。
In the Pearl River Delta area, there are about 400-500 million mu of fertile Shatiang, mainly producing rice, which is an important grain producing area in Guangdong Province. However, due to the high temperature and humidity in the climate, pests of rice are extremely rampant. Especially for the three stem borers, they often occur for 4 to 5 generations within a year, becoming a major threat to rice production. In 1953, Zhongshan County, in order to further develop the potential for increasing production in Shatin, changed the double cropping rice to a total of about 30,000 mu for continuous cropping rice. However, in the fall, above 50. This will greatly affect the smooth implementation of the inter-crop improvement and rice-growing measures in development.