| 摘要: |
| 利用15N 示踪田间模拟和砂培试验,着重研究了小麦幼苗(从种子萌发到三叶龄)生长与种子蛋白质含量的关系以及吸肥状况。结果表明:种子萌发后,根系即从土壤中吸收 N 素。三叶期幼苗植株中 N 素的60—80%来自肥料 N 和土壤 N。种子胚乳蛋白质只能满足一叶一心幼苗正常生长需要的 N 量。小麦胚乳营养中的 N素营养是影响幼苗生长的主要限制因素。从 N 素营养来看,幼苗离乳期是一叶一心期,不是三叶期。 |
| 关键词: 氮素营养 小麦幼苗 种子胚 蛋白质含量 种子萌发 胚乳 三叶期 幼苗生长状况 全营养液 培养液 |
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| STUDIES ON THE GROWTH OF WHEAT SEEDLINGS IN RELATION WITH NITROGEN NUTRITION |
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| Abstract: |
| Using stable isotope~(15)N as tracer,by means of field simulation and sand culture,the relationship between the growth of wheat seedlings and the protein content of kernels was studied.ASo also was the abso- rption of nitrogen nutrition by the seedlings.The result indicated that the root systems began to absorb nitrogen from the soil as soon as the seedlings emerged.At three-leaf stage,60-80% of the nitrogen of the nitrogen of the seedlings came either from fertiligers or from the soil while protein from th... |
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