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选用杂交稻汕优2号、常规稻桂朝2号等中迟熟品种在早造栽培,或在晚造翻秋栽培条件下,早造本田始蘖后6—10天、晚造本田始蘖后5—8天,主苗加分蘖数已相当于收获期有效穗数值,即达够苗标准。够苗期以后的施氮量必须经诊断确定。据1983—1985年研究,够苗期后的施氮量诊断,可通过调查必要的数值代入多个“诊断方程”求得,但手续仍嫌烦琐。为使这项高产技术规程更易于推广,更有实用价值,根据“追氮数量诊断方程”原理和各生育期施氮限量原则,将中后期施氮量诊断
Selection of hybrid rice Shanyou 2, conventional rice Guichao No. 2 and other late-maturing varieties cultivated in the late or under the conditions of turning-autumn cultivation, as early as 6-10 days after the beginning of Honda tiller, late-made Honda starting tiller After 5-8 days, the main seedling plus tillering number has been equivalent to harvest effective panicle value, that is up to seedling standards. Sufficient nitrogen fertilizer after seedling stage must be confirmed by diagnosis. According to the 1983-1985 study, the amount of nitrogen applied to seedlings after the seedling stage can be obtained by investigating the necessary values into multiple “diagnostic equations”, but the formalities are still cumbersome. In order to make this high-yielding technical regulation easier to popularize and more practical value, according to the principle of “the diagnostic equation of the amount of nitrogen recovery” and the principle of nitrogen limitation in each growth period,