| 水稻碳氮吸收、分配与积累对施肥的响应 |
| 摘要点击 1971 全文点击 2866 投稿时间：2010-06-02 修订日期：2010-08-10 |
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| 中文关键词 水稻 生物量分配 碳氮含量 积累 施肥 |
| 英文关键词 rice biomass distribution content of carbon and nitrogen accumulation fertilization |
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| 中文摘要 |
| 以亚热带典型稻田生态系统长期定位试验为对象，研究等氮条件下不同施肥方式对水稻植株碳氮吸收、分配与积累的影响，分析了水稻碳氮的积累关系.结果表明，低量有机肥结合化肥配施能有效促进碳素在水稻植株体内的分配.有机-无机肥配施处理下水稻茎叶和籽实中氮含量相对较高，分别为8.9～10.2 g·kg-1和11.9～14.8 g·kg-1，分别比单施化肥处理高13%～53%和9%～19%，比对照（不施肥）处理高12%～77%和23%～32%.水稻碳、氮储量大部分积累在植株的地上部分，其中，有机-无机肥配施处理下水稻籽实中碳、氮储量较大，分别为3467.8～4323.9 kg·hm-2和120.3～135.2 kg·hm-2，比单施化肥处理分别高13%～23%和26%～45%.研究表明，籽实是水稻植株主要的碳、氮汇，有机-无机肥料配施有利于水稻碳的积累和氮的吸收，其水稻碳氮的固定、吸收还具有一定的潜力. |
| 英文摘要 |
| In this study,the assimilation,partition and accumulation of carbon (C) and nitrogen (N),as well as the relationship between C and N accumulation of rice,were studied from typical paddy ecosystems under long-term fertilizer applications with equal N inputs in subtropical China.The results showed that chemical fertilizer plus low organic manure (LOM) could promote effectively the distribution of C in the rice plant.The N content in the stem-leaf and grain of rice under organic-inorganic fertilization was 8.9-10.2 g·kg-1 and 11.9-14.8 g·kg-1 respectively.It was much higher than under other treatments,with about 13%-53% and 9%-19% higher than under the chemical fertilization (NPK),separately and 12%-77% and 23%-32% higher than under the control treatment (CK),respectively.The C and N storages of rice were mainly accumulated in the aboveground part.Organic-inorganic fertilization treatment possessed higher storages of C (3467.8-4323.9 kg·hm-2) and N (120.3-135.2 kg·hm-2) in the rice grain,which was about 13%-23% of C and 26%-45% of N higher than under NPK treatment.It indicated that rice grain was the main sink of C and N.The organic-inorganic fertilization was in favor of C accumulation and N absorption in the rice plant and it still possesses an obvious potential in C and N sequestration and absorption in subtropical paddy field. |
