| 稻草和尿素配施时水稻对肥料氮和土壤氮的吸收利用 |
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| 引用本文： | 张辛未,刘枫,叶舒娅,朱宏斌,叶成信.稻草和尿素配施时水稻对肥料氮和土壤氮的吸收利用[J].核农学报,1996,10(1):0-0. |
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| 作者姓名： | 张辛未 刘枫 叶舒娅 朱宏斌 叶成信 |
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| 作者单位： | 安徽省农业科学院土壤肥料研究所 |
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| 摘 要： | 利用＾１５Ｎ同位素示踪技术,研究了稻草和尿素配施时水稻对肥料和土壤氮的吸收。结果表明,稻草单施导致土壤速效氮的生物固定,氮素供应不足是影响水稻分蘖成穗的限制因子,稻草配合尿素施用,明显改善肥料氮和土壤氮的供应,既有利于当季水稻增产,也有利于培养土壤肥力,还有利于后茬物作产量的提高 。
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| 关 键 词： | 水稻 稻草 尿素 肥料氮 吸收 |
| 收稿时间： | 2009-12-31 |
| 修稿时间： | 2009-12-31 |
ABSORPTION AND UTILIZATION OF FERTILIZER-N AND SOIL-N WITH MIXED APPLICATION OF STRAW AND UREA BY RICE |
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| Abstract: | The nitrogen absorption of mixed application of straw and urea by rice was studied byusing 15N isotope tracing technique. The results show that the sole application of straw wouldresult in biological immobilization of available soil N. The insufficient N supply was the lim-iting factor for rice tiller and spikelets development.Mixed use of straw and urea obviouslyimproved nitrogen supply from both rertilizer and soil,which in turn, promoted the yield ofgrowing rice and jncreased the soil rertility and productivity of later crop. |
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