论文部分内容阅读
在品种、土壤、底肥和追肥等一致的情况下,对三个不同海拔地区种植的水稻的次库(茎+叶鞘)中碳水化合物含量作了比较,结果表明:齐穗和黄熟期次库中总糖或淀粉含量均随海拔增高而增加。但在黄熟期,高海拔地区次库的总糖或淀粉含量比齐穗期的增加,而低海拔地区次库的总糖或淀粉含量则比齐穗期的降低。 齐穗期时,次库的淀粉含量随施用的氮素肥量的增加而降低。在黄熟期,温凉稻作区水稻次库的淀粉含量均随氮素底肥施用量的增加而增加,低熟地区水稻次库的淀粉含量则趋于一致,不过不同地区相比各处理次库的淀粉含量均因海拔增高而增加。 不同时期的氮素追肥使齐穗期次库淀粉含量因追肥时间推迟而增加,唯元江晚穗肥处理的低于中穗肥处理的。黄熟期因追肥时间提早而次库的淀粉含量增加,但元江以早穗肥处理的次库淀粉含量最低。与齐穗期相比时,低海拔地区的各个处理,其次库的淀粉含量均减低,但高海拔的昆明温凉稻作区,施早和中穗肥的水稻,在黄熟期次库的淀粉含量反而增高。还可以看出水稻种植地海拔越高,其次库淀粉含量对追肥时间越敏感。 基于水稻次库中淀粉含量对氮素肥料的反应,就三地气候条件讨论了上述的差异。
The results showed that the carbohydrate contents in the sub-reservoirs (stems + sheaths) of three rice cultivars at different altitudes were compared under the same varieties, soil, base fertilizer and top dressing. The results showed that: Total sugar or starch content increased with altitude. However, in yellow ripening stage, the total sugar or starch content in sub-reservoirs in high-altitude areas increased compared with that in full-heading stages, while the total sugar or starch content in sub-reservoirs in low-altitude areas was lower than that in heading stage. At the heading stage, the starch content of the sub-stock decreased with the increase of nitrogen application. In the yellow ripening stage, the starch content of rice sub-reservoirs in warm and cool paddy areas increased with the increase of nitrogen application rate, while the starch content in sub-reservoirs in low-ripe areas tended to be the same, but in different areas, The starch content increased due to elevation. Nitrogen topdressing in different periods increased the starch content in the secondary pool at the heading stage due to the time delay of topdressing. The starch content of the secondary database increased due to the earlier dressing time in the yellow ripening stage, but the starch content of the secondary sinks treated by the early panicle treatment in the Yuanjiang River was the lowest. Compared with the heading stage, the starch content of the second bank decreased in all the treatments at low altitude, but in the warm and cool paddy areas of Kunming at high altitude, Instead, the content increased. It can also be seen that the higher the altitude of rice planting, the second is the more sensitive to top dressing time. Based on the response of starch content to nitrogenous fertilizer in the sub-stocking of rice, the above differences were discussed on the three climatic conditions.