| 肖强,隗公臣,吕东,孙鹏,衣文平,倪小会,徐秋明,李丽霞,曹兵.微水溶性胶结包膜肥料氮素释放速率与预测[J].干旱地区农业研究,2016,34(1):108~113 |
| 微水溶性胶结包膜肥料氮素释放速率与预测 |
| Nitrogen release rate and prediction of micro water soluble cement and coated fertilizer |
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| DOI：10.7606/j.issn.1000-7601.2016.01.17 |
| 中文关键词: 微水溶性胶结包膜肥料 半干旱气候 氮素释放速率 预测 |
| 英文关键词:micro-water soluble felted and coated fertilizer arid and semi-arid area nitrogen release rate prediction |
| 基金项目:国家自然科学基金青年基金项目（31301847,31301846）;国家科技支撑计划（2011BAD11B02,2012BAD15B02-1）；北京市缓控释肥料工程技术研究中心阶梯计划(Z111105055311092)；北京市科技计划项目“控释肥料新产品产业化研发”（Z131100003313004） |
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| 中文摘要: |
| 应用恒温培养试验研究了适用于半干旱气候条件下的微水溶性胶结包膜肥料在不同土壤含水量条件下的氮素释放速率，并基于一级化学反应、采用田间试验数据构建了氮素释放预测方程。结果显示：微水溶性胶结包膜肥料氮素累积释放量与土壤含水量呈一定的正相关关系，在75 d左右的时候，在22%土壤含水量下其氮素释放达到了85%～90%，14%土壤含水量下达到了60%～82%，6%土壤含水量下达到了35%～42%。同时，田间试验结果也说明了微水溶性胶结包膜肥料氮素瞬时释放速率受降雨及土壤含水量的影响显著；在降雨后或土壤含水量高的情况下，微水溶性胶结包膜肥料的释放速率加快。在此基础上，通过最小二乘法求参等方式构建了以土壤含水量为主要因子的微水溶性胶结包膜肥料氮素释放预测方程，预测值与实测值拟合程度较好，决定系数达到了0.976。 |
| 英文摘要: |
| Incubation test was used to investigate nitrogen release rate of micro water soluble felted and coated fertilizer that was applied to semiarid climatic environment under the condition of different soil moisture levels, and a prediction equations was built based on the one-level chemical reaction and the field test. The results showed that the accumulation of nitrogen release was positively correlated with soil water content. At 75 days when soil water contents were 22%, 14% and 6%, the nitrogen releases reached 85%～90%, 60%～82%, and 35%～42%, respectively. In addition, the field experiments implied that nitrogen release rate was significantly influenced by rainfall and soil water content. After a rainfall or under high soil moisture conditions, nitrogen release rate became increased and vice versa. Therefore, a prediction equation was built through the least square method for parameters and soil water content was the main parameter. The predicted values fitted well with the measured values with an R2=0.976. |
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