| 接触施肥模式下包膜控释肥料氮素在土壤中的迁移与转化 |
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| 引用本文： | 肖强,王甲辰,左强,张琳,刘宝存,赵同科,邹国元.接触施肥模式下包膜控释肥料氮素在土壤中的迁移与转化[J].农业科学与技术,2009,10(6):144-149. |
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| 作者姓名： | 肖强 王甲辰 左强 张琳 刘宝存 赵同科 邹国元 |
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| 作者单位： | 北京市农林科学院植物营养与资源研究所,北京,100097 |
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| 基金项目： | 北京市科技新星计划，北京市科委"多功能肥料/基质研究与开发"，北京市农林科学院青年基金"适用于半干旱条件下的微水溶性胶结包膜缓释肥的研制及评价"资助.Supported by Beijing Science Committee Project" Science & Technology New Star"，" The Research and Establishment of Agrochemical Service System for New Type of Fertilizer"(d0706004040431)；The Foundation for Youth Scholars of Beijing Academy of Agriculture and Forestry Sciences " The Development and Evaluation of Micro Water-soluble Cementation Coated Slow-release Fertilizers S |
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| 摘 要： | 应用田间微区试验,研究接触施肥模式下自制的包膜控释肥料（对普通复合肥进行包衣而成,N：P2O5：K2O=28：9：10;25℃水中总氮初级溶出率为0.27%,80 d释放80%,编号YZS80）氮素在土壤中的迁移与转化。测定项目与方法：10.00g鲜土经过50 ml 1 mol/L NaCl浸提过滤后,紫外分光光度计法比色测定硝态氮,靛酚蓝比色法测定铵态氮：10.00 g鲜土经过50 ml蒸馏水浸提过滤后,对二甲氨基苯甲醛-紫外分光光度计法比色测定土壤尿素态氮;对二甲氨基苯甲醛-紫外分光光度计法测定肥料总氮。试验表明：与普通复合肥相比,YZS80全氮平均约以每天0.4%的速度逐步释放,80 d内全氮释放了约32%;在施肥点垂直向下方向,YZS80处理土壤中尿素态氮含量在45～80 d内30～60 cm土层显著（P〈0.05）增高;硝态氮含量在0～80 d内10～60 cm土层变化幅度小,含量适中（10～100 mg/kg）,但45～80 d与0～45d相比显著（P〈0.05）增高;铵态氮含量在45 d之前10～30 cm土层显著偏低（P〈0.05）,但45 d之后10～60 cm土层显著（P〈0.05）增高,随时间的延续,硝/铵值逐渐符合作物需求范围;在接触施肥模式下,YZS80处理产生烧根与盐害的可能性以及硝态氮的淋溶流失风险都显著降低。
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| 关 键 词： | 接触施肥 缓/控释肥料 迁移 转化 |
Migration and Transformation of Coated Controlled Release Nitrogen in Soil under Co-situs Application Mode |
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| XlAO Qiang,WANG Jia-chen,ZUO Qiang,ZHANG Lin,LIU Bao-cun,ZHAO Tong-ke,ZOU Guo-yuan.Migration and Transformation of Coated Controlled Release Nitrogen in Soil under Co-situs Application Mode[J].Agricultural Science ＆ Technology,2009,10(6):144-149. |
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| Authors: | XlAO Qiang WANG Jia-chen ZUO Qiang ZHANG Lin LIU Bao-cun ZHAO Tong-ke ZOU Guo-yuan |
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| Institution: | ( Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097) |
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| Abstract: | By using field trials, the migration and transformation of coated controlled release nitrogen （YZS80） in soil under the co-situs application mode were studied. The results indicated that YZS80 nitrogen dissolved out in average speed of about 0.4%/d and 32% totally in 80 d compared with common compound fertUizer. For YZS80, in the vertical downward direction of application points, urea nitrogen content increased significantly （P 〈0.05） in the 45 -80 d and the 30 -60 cm soil layers; nitrate nitrogen content was little change range and in moderate （10 -100 mg/kg） in 0 -80 d and 10 -60 cm soil layers, but increased significantly （ P 〈0.05） 45 -80 d compared to 0 -45 d; ammonium nitrogen content was significant lower （P〈0.05） before 45 d in 10 -30 cm soil layers, but significant higher（P〈0.05） after 45 d in 10 -60 cm soil layers; NO3^- -N/NH4^＋ -N meets gradually the needs of the crop with the extension of time. Under the co-situs application mode, the possibility of burning root and salt injury and loss dsk of nitrate leaching is a significant reduction. |
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| Keywords: | Co-situs application Slow/controlled release fertilizer Migration Transformation |
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