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我省淮北地区位于北纬32°24′—34°37′之间,在亚洲大陆的东部,临近太平洋,兼受干冷、暖湿气流影响,光、温、湿等气候条件有明显的季节变化.杂交水稻光合生产与光、温、湿等气象条件密切相关.产量主要决定于光合生产的状况.为了研究淮北杂交水稻高产栽培技术,我们特进行了两年分期播种试验,研究播种期与光合生产的关系,从而探讨适宜播种期,以及不同播种期的栽培技术. 一、试验设计和栽培条件(一) 试验设计1977年试验地点在濉溪县雷山大队农科队(北纬33°53′东经116°52′).供试组合为威优3号和汕优6号.分别于4
The region of Huaibei in our province is located between latitude 32 ° 24’-34 ° 37’N. In the eastern part of the Asian continent, close to the Pacific Ocean, with the effects of dry and cold, warm and humid air currents, there are obvious seasonal changes in climatic conditions such as light, temperature and humidity. The photosynthesis of hybrid rice is closely related to meteorological conditions such as light, temperature and humidity, etc. The yield mainly depends on the status of photosynthetic production.In order to study the high-yielding cultivation techniques of hybrid rice in Huaibei, we carried out two-year sowing experiments to study the relationship between sowing date and photosynthesis (1) Design of experiment and cultivation conditions (I) Design of experiment In 1977, the experimental sites of Leiban agricultural team in Suixi County (latitude 33 ° 53’N 116 ° E 52 ’) for the test combination of Weiyou 3 and Shanyou 6, respectively