| 摘要: |
| 本文利用15N-硫铵和15N 标记的水稻种子分别研究了水稻秧苗对外源氮肥的吸收;种子胚乳氮素分解的过程以及外源氮肥对胚乳养分分解的影响。结果证明,水稻苗期根系一出来就能吸收外源氮肥;还证明外源氮肥能加速胚乳养分的分解。这些结果为水稻育秧增施基肥提供了理论依据。 |
| 关键词: 养分消耗 水稻秧苗 根系吸收 养分分解 不同时期 水稻种子 胚乳 素分解 百分数 外源氮 |
| DOI： |
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| 基金项目: |
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| STUDIES ON THE NUTRITION IN ENDOSPERM OF RICE SEED |
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| Abstract: |
| Using stable isotope ~(15)N as tracer and ~(15)N-rice seed,by means of sard culture,the relationship between the growth of rice seedling and the protein content of endosperm was studied,and also the absorption of nitrogen nutrition by the seedling.The results may be summerized as follows. 1.The root system began to absord nitrogen from the soil as soon as the seedling emerged.Therefore,it modifyies the view that radicle does not absorb nitrogen from the soil in weaning stage of rice seedl- ing. 2.Nitrogen o... |
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