论文部分内容阅读
1996～ 1 998年以Ⅱ优多恢 5 7为材料 ,研究了移栽、深水、施氮与水稻环境敏感期分蘖芽生长的关系。结果表明 :( 1 )秧苗移栽期叶龄分别与秧苗带蘖死亡率和处于环境敏感期叶位分蘖芽的出鞘期呈极显著负相关关系 ,冬水田秧苗最适宜移栽叶龄为 5 8叶左右。 ( 2 )深水处理 3天以上秧苗处于环境敏感期叶位的分蘖发生率为 0 ,移栽返青期以灌浅水为宜。 ( 3)深水控制环境敏感期叶位分蘖芽的效果与本田底肥施氮量呈极显著负相关关系 ,每公顷施纯氮 95kg以内深水控苗效果极佳。
The relationship between transplanting, deep-water and nitrogen application and the growth of sensitive environment-sensitive tiller bud in rice was studied from 1996 to 1998 with Ⅱ Youduo 5 7 as material. The results showed that: (1) There was a significant negative correlation between the leaf age at the transplanting stage of seedling and the mortality of tillering of seedlings and that of tillering buds at the leaf position in the environment-sensitive stage. The optimal leaf transplanting age was 5 Around 8 leaves. (2) The tillering rate of 0-day-old seedlings in the environment-sensitive stage for more than 3 days in deep-water treatment is better than that in shallow-watering. (3) There is a significant negative correlation between the effect of tiller bud at the leaf position and the nitrogen application rate at the base of Honda under the environment of deep water control. The effect of deep-water control seedling within 95kg nitrogen per hectare is very good.