| 徐 智,农传江,王宇蕴,范茂攀,汤 利.橡胶籽油枯堆肥过程中水溶性氮的组分变化特征研究[J].农业环境科学学报,2014,33(3):490-494. |
| 橡胶籽油枯堆肥过程中水溶性氮的组分变化特征研究 |
| Changes of Water-soluble Nitrogen During Composting of Rubber Seed Cake |
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| DOI：10.11654/jaes.2014.03.013 |
| 中文关键词: 橡胶籽油枯 锯末 堆肥 水溶性氮 |
| 英文关键词: rubber seed cake sawdust composting water-soluble nitrogen |
| 基金项目: |
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| 摘要点击次数: 1905 |
| 全文下载次数: 1990 |
| 中文摘要: |
| 以橡胶籽油枯、锯末为堆肥基本原料，设置橡胶籽油枯单独堆肥和橡胶籽油枯+锯末（35%橡胶籽油枯+65%锯末，重量比）2个堆肥处理，研究堆肥过程中温度、GI值、水分含量、pH值和水溶性总氮、水溶性有机氮、水溶性无机氮、水溶性铵态氮和硝态氮的变化。结果表明，橡胶籽油枯单独堆肥的腐熟进程缓慢，在本试验结束时没有达到堆肥腐熟；橡胶籽油枯堆肥过程中添加锯末能够促进橡胶籽油枯腐熟。橡胶籽油枯堆肥过程中水溶性总氮、有机氮和无机氮的含量都是呈现先上升后下降的趋势，水溶性有机氮的占水溶性总氮的比例减少，水溶性无机氮占水溶性总氮的比例增加，且堆肥腐熟后，水溶性无机氮以硝态氮为主。橡胶籽油枯单独堆肥处理的水溶性总氮、有机氮和无机氮的含量分别为6 819.5、4 983.0 mg·kg-1和1 836.8 mg·kg-1，水溶性的无机氮和有机氮占水溶性总氮的29.9%和70.1%，水溶性NH+4-N含量为水溶性无机氮含量的87.1%，橡胶籽油枯+锯末堆肥水溶性总氮、有机氮和无机氮的含量分别为3 136.0、1 863.4 mg·kg-1和1 272.7 mg·kg-1，水溶性的无机氮和有机氮占水溶性总氮的40.5%和59.5%，且水溶性NO-3-N含量为水溶性无机氮含量的81.1%。 |
| 英文摘要: |
| Rubber seed cake, a by-product after oil extraction, contains nutrients and may be used as fertilizer after composting. Here we studied the changes of nitrogen in rubber seed cake during composting with sawdust at 0 and 65% sawdust（W/W）. Water-soluble total nitrogen, water-soluble organic nitrogen, water-soluble inorganic nitrogen, water-soluble NH+4-N and water-soluble NO-3-N and temperature were measured during the compositing process. The influence of filtrate from composted cake on seed germination was also tested. The composting process of rubber seed cake was slow, and was not completed at the end of experimental period. Addition of sawdust could expedite the composting process of rubber seed cake. Contents of water-soluble total nitrogen, water-soluble organic nitrogen, and water-soluble inorganic nitrogen were decreased after increasing at the begining during composting process. The percentage of water-soluble organic nitrogen in the water soluble total nitrogen reduced gradually, while water soluble inorganic nitrogen proportion in the water soluble total nitrogen increased gradually. At the end of composting, NO-3-N was the dominate water soluble inorganic nitrogen. For the treatment with rubber seed cake only, the water-soluble total nitrogen, water-soluble organic nitrogen, water-soluble inorganic nitrogen was 6 819.5 mg·kg-1, 4 983.0 mg·kg-1 and 1 836.8 mg·kg-1，respectively. The water-soluble inorganic nitrogen and water-soluble organic nitrogen accounted for 29.9% and 70.1 % of total nitrogen; water-soluble NH+4-N was 87.1% of the water soluble inorganic nitrogen. For the treatment with rubber seed cake + sawdust, however, the water-soluble total nitrogen, water-soluble organic nitrogen, water-soluble inorganic nitrogen was 3 136.0 mg·kg-1, 1 863.4 mg·kg-1 and 1 272.7 mg·kg-1，respectively. The water-soluble inorganic nitrogen and water-soluble organic nitrogen were respectively 40.5% and 59.5% of total nitrogen, while water-soluble NO-3-N comprised 81.1% of the water soluble inorganic nitrogen. |
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