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杂交水稻较常规稻有明显的分蘖和大穗优势。在干物质积累上,生育前期优势明显,中后期优势迅速减弱。有人把它总结为“三有余、三不足”,即前劲有余,后劲不足;分蘖有余,成穗不足;穗大有余,结实不足。针对杂交稻的上述特点,我们于1980—1982年连续进行了三年小区试验,从氮肥施用角度探讨与其相应的促控方法。 试验概况 本试验1980、1981年在本社农科所、1982年在剅台大队四生产队的连作晚稻田上进行。土质均为中壤。供试组合:前两年为温线早A×圭630;第三年为汕优6号。插秧期:前两年在7月20日以前;为了检验在迟茬口情况下的试验结果,第三年将插期推迟
Compared with conventional rice, hybrid rice has obvious advantages of tillering and big spike. On dry matter accumulation, the pre-birth advantage is obvious, and the advantage in the middle and late period is rapidly weakened. Some people put it summed up as “more than three, three deficiencies,” that is more than front-end potential, lack of stamina; more than tillering, insufficient spike; spike than, stubborn enough. For the above characteristics of hybrid rice, we conducted a three-year plot experiment in 1980-1982 continuously, and discussed its corresponding method of promoting and controlling from the perspective of nitrogen fertilizer application. Test Overview This experiment in 1980, 1981 in the Society of Agricultural Science, in 1982 in Qiantao Brigade four production team even crop late rice fields. Soil is medium in soil. Test combinations: the first two years as the warm line early A × Kyu 630; the third year Shanyou 6. Transplanting period: the first two years before July 20; in order to test the test results in the case of late crop, the third year postpone the insertion period