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在田间种植条件下,于甘蔗收获期,测定分析了5个不同基因型甘蔗地上部各部位的干重和氮、磷、钾含量。结果表明,在参试的5个基因型甘蔗中,粤糖60号(YT60)和斑茅杂交后代(BC2-32)的叶片干重显著高于其他3个基因型甘蔗,YT60叶鞘和茎干重均最高。5个基因型甘蔗不同部位叶片、叶鞘和茎干重平均值来看,新叶片>上、中部叶片>下部叶片,上部叶鞘>中、下部叶鞘干重,上部茎>中部茎>下部茎。同时,叶片氮含量高于叶鞘和茎,上部叶片氮含量高于其他部位氮含量,不同部位叶鞘中氮含量表现为上部>中部>下部,而不同部位茎中氮含量差异不显著。不同部位叶片、叶鞘和茎中磷含量均表现为上部>中部>下部。上部叶片中钾含量高于其他部位,而不同部位叶鞘和茎中钾含量则表现为上部>中部>下部。此外,YT60和BC2-32的整株氮、磷素累积量高于其他参试基因型,但YT60的整株钾累积量最高,BC2-32最低。所有基因型甘蔗不同部位叶片氮、磷、钾素累积量表现出为新>上部>中部>下部;上部叶鞘氮、磷、钾素累积量显著高于中、下部叶鞘;而不同部位茎中氮素累积量均是上部茎<中部茎<下部茎,不同部位茎中磷、钾素累积量差异不显著。说明在相同种植条件下,不基因型甘蔗养分需求量不同,且对体内养分再利用能力不同。
Under the field planting conditions, the dry weight and nitrogen, phosphorus and potassium contents of various parts of the upper part of five different genotypes were determined and analyzed during the harvest period of sugarcane. The results showed that the leaf dry weight of YT60 and Codonopsis hybrid BC2-32 was significantly higher than that of the other three genotype sugarcane in the five genotypes of sugarcane tested, YT60 leaf sheath and stem Highest weight The average leaf, sheath and stem weight of different parts of five genotypes of sugarcane, the new leaves> upper and middle leaves> lower leaves, upper leaf sheath> middle and lower leaf sheath dry weight, upper stem> middle stem> lower stem. At the same time, the nitrogen content in leaves was higher than that in leaf sheaths and stems. The contents of nitrogen in upper leaves were higher than those in other parts. The contents of nitrogen in leaf sheaths of different parts were upper> middle> lower, while the nitrogen content in different parts was not significant. Phosphorus content in leaves, leaf sheaths and stems of different parts showed top> middle> bottom. The content of potassium in the upper leaves was higher than that in the other parts, but the contents of potassium in the leaf sheaths and stems in different parts showed the top> middle> bottom. In addition, the total nitrogen and phosphorus accumulation of YT60 and BC2-32 were higher than other tested genotypes, but YT60 had the highest total potassium accumulation and the lowest BC2-32. The accumulations of nitrogen, phosphorus and potassium in different parts of sugarcane showed New> upper> middle> lower; the accumulation of nitrogen, phosphorus and potassium in upper leaf sheath was significantly higher than that in middle and lower leaves; The accumulative amount of primes were both upper stem
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