汤洁,陈静书,李昭阳,等. 氮磷肥料的添加对盐碱旱田有机碳矿化和激发效应的影响[J]. 科学技术与工程, 2020, 20(29): 12226-12234.
tangjie,et al.Effects of Nitrogen or Phosphorus Fertilizer on Organic Carbon Mineralization and Priming Effect in Saline-alkaline Upland[J].Science Technology and Engineering,2020,20(29):12226-12234. |
| 氮磷肥料的添加对盐碱旱田有机碳矿化和激发效应的影响 |
| Effects of Nitrogen or Phosphorus Fertilizer on Organic Carbon Mineralization and Priming Effect in Saline-alkaline Upland |
| 投稿时间：2019-12-11 修订日期：2020-06-24 |
| DOI： |
| 中文关键词: 盐碱旱田 氮磷添加 有机碳矿化 激发效应 |
| 英文关键词:saline-alkali upland nitrogen and phosphorus addition organic carbon mineralization priming effect |
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| 中文摘要: |
| 为研究氮、磷添加后，盐碱旱田土壤有机碳（soil organic carbon，SOC）矿化和激发效应的变化规律，选择吉林西部3块盐碱旱田样地（H1，H2，H3），采用实验室模拟培养，将无机营养素（(NH4)2SO4、KNO3和KH2PO4）以6种形式添加到0~15 cm表层土壤样本中，在25℃恒温箱内连续监测32天的CO2释放量。结果表明，（1）随着培养时间延长，SOC矿化量逐渐增加，添加氮、磷使得SOC矿化累积显著增加了211.0%~876.5%。（2）随着培养时间延长，各样地SOC矿化速率呈现逐渐降低的趋势。培养结束后，CK组矿化速率降至42.8、26.7、38.4 mg·(kg·d)-1，添加氮、磷使得矿化速率增加了211.0%~770.5%。（3）在培养期间，各添加组均产生了正激发效应，但其变化无明显规律。（4）SOC矿化作用、激发效应与碱化程度表现出显著负相关（p<0.05），盐碱程度越大，SOC矿化作用越小，正激发效应越小。 |
| 英文摘要: |
| In order to study the variations of soil organic carbon (SOC) mineralization and priming effect of saline-alkali upland soil after adding nitrogen and phosphorus, three samples of saline-alkali upland soil (H1, H2, H3) in western Jilin were selected for the experiment. Adopting the method of simulated cultivation, the experiment added inorganic nutrients((NH4)2SO4, KNO3 and KH2PO4) to soil samples with the surface layer of 0~15 cm in 6 forms, monitoring the CO2 release in a 25℃ incubator for 32 consecutive days. The experiment results indicate that: (1) As the time of soil incubation prolongs, the SOC mineralization amount has an uptrend. It shows that the accumulation of SOC mineralization significantly increases by 211.0%~876.5% with nitrogen and phosphorus added. (2) As the time of soil cultivation prolongs, the SOC mineralization rate of each sample shows a trend of gradual decline. When the incubation is over, the mineralization rate of the CK group goes down to 42.8, 26.7 and 38.4 mg·(kg·d)-1. The addition of nitrogen and phosphorus significantly increases the mineralization rate by 211.0~770.5%. (3) During the soil cultivation, each added group produces a positive priming effect but the change is not obvious. (4) SOC mineralization and priming effect shows a significant negative correlation to the alkaline degree indicate (p<0.05), which is, the greater the salinity, the weaker the SOC mineralization, the weaker the priming effect. |
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