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材料和方法 1983年晚造和1984年早造在本所网室用盆栽方法,应用氮的稳定性同位素~(15)N标记尿素示踪方法进行研究。供试品种:早稻“汕优2号”(杂交稻)、“桂朝2号”(常规稻),晚稻“汕优6号”(杂交稻)、“桂朝2号”(常规稻)。早、晚稻各品种分别设置如下处理:①基肥施氮区:基肥施~(15)N标记尿素每盆0.25克,其他时期施普通尿素;②分蘖期施氮区:分蘖期施~(15)N标记尿素每盆0.25克,其他时期施普通尿素;③分化期施氮区:分化期施
MATERIALS AND METHODS The pot experiment was conducted in late 1983 and early 1984 to study the method of pot experiment with nitrogen stable isotope (15) N labeled urea. Test varieties: early rice “Shanyou 2” (hybrid rice), “Guichao 2” (conventional rice), late rice “Shanyou 6” (hybrid rice), “Guichao 2” (regular rice). Early and late rice varieties were set up as follows: ① basal nitrogen application area: basal application of ~ (15) N labeled urea 0.25 g per pot, normal urea applied in other periods; ② tillering stage nitrogen application: tillering stage applying ~ (15) N labeled urea 0.25 grams per pot, Shi Shi ordinary urea at other times; ③ differentiation nitrogen zone: differentiation Shi Shi