论文部分内容阅读
本文对5个能源甘蔗基因型叶片和茎鞘的可溶性糖含量、全N及可溶性糖含量：全N含量的消长进行动态分析。结果表明：（1）叶片的可溶性糖（CL）前期低，伸长盛期最低，伸长后期、工艺成熟期升高：茎鞘可溶性糖含量（Cs）从分蘖期开始一直稳步提高；叶片和茎鞘全N含量从分蘖期开始不断下降；叶片可溶性糖／全N（CL／NL）在分蘖期和伸长初期较低，伸长盛期最低，伸长后期和工艺成熟初期升高；茎鞘可溶性糖／全N（Cs／Ns）在全生育期稳步增加，（2）叶可溶性糖含量、可溶性糖含量／全氮（CL／NL）低于茎鞘；叶全氮含量高于茎鞘。（3）相关分析表明：叶、茎鞘可溶性糖含量和净同化率极显著负相关，叶片含氮量与净同化率显著相关；叶、茎鞘可溶性糖含量／全氮与净同化率显著负相关，碳氮代谢和叶面积指数之间未发现显著相关性。
In this paper, five soluble sugarcane genotypes leaves and stems soluble sugar content, total N and soluble sugar content: total N content of the dynamic analysis. The results showed that: (1) Soluble sugar (CL) of leaves at the early stage was the lowest, while the elongation stage was the lowest. At the late stage of elongation, the mature stage of the process was increased. The soluble sugar content (Cs) of the stem and sheath increased steadily from tillering stage; The total N content of stems and sheaths decreased continuously from tillering stage. The soluble sugar / total N (CL / NL) of leaves was lower at the tillering stage and the early elongation stage, the lowest elongation stage, the late elongation stage and the earlier stage of the process maturation. Soluble sugar / total N (Cs / Ns) increased steadily during the whole growth period. (2) Leaf soluble sugar content, soluble sugar content / total nitrogen (CL / NL) were lower than stems and sheaths; (3) Correlation analysis showed that there was a significant negative correlation between soluble sugar content and net assimilation rate of leaf, stem and sheath, and the nitrogen assimilation rate was significantly correlated with net assimilation rate. Soluble sugar content / total nitrogen and net assimilation rate of leaf and stem sheath were significantly negative Correlation, no significant correlation was found between carbon metabolism and leaf area index.