期刊论文

Responses of organic carbon mineralization and priming effect to phosphorus addition in paddy soils

Wang, G.-J.

中文

应用生态学报

1001-9332

2018

29

3

857-864

10.13287/j.1001-9332.201803.023

This work was supported by the National Natural Science Foundation of China (41430860, 41371304), the Special Sub-Subject of Strategic Leading Science and Technology of Chinese Academy of Sciences (XDB15020401), and the Natural Science Foundation of Hunan Province (2016JJ3132).

本校为第一机构

采用室内模拟培养和~(13)C同位素标记技术相结合的研究方法,探讨了在葡萄糖与无机氮肥共施的条件下,土壤有机碳矿化及其激发效应对外源磷添加的响应,以揭示土壤有机碳矿化的碳磷耦合调控机制.结果表明:外源磷的输入加快了CO_2的释放,但抑制了CH_4的释放;在整个土壤淹水培养期间,磷添加抑制了土壤碳矿化释放CH_4总量的53.1%,其中外源葡萄糖-~(13)C矿化成~(13)CH_4的总量降低了70.5%;磷添加促使通过微生物转化的葡萄糖-~(13)C向易利用态碳库的分配比例增加了3.6%,显著提高土壤有机碳快库矿化速率,缩短土壤碳矿化周期.土壤培养前期,外源有机质的添加表现为短暂的负激发效应;随着葡萄糖不断矿化分解...

To understand the coupled controlling of carbon (C) and phosphorus (P) on the minera-lization of soil organic carbon and amended substrates in paddy soil, we investigated the effects of P addition on the decomposition of organic carbon and its induced priming effect by using 13C isotope probing technique in microcosm. The results showed that P addition accelerated the release of CO2 but inhibited the release of CH4, leading to 53.1% reduction of total accumulated CH4 and 70.5% reduction of the 13CH4 derived from exotic glucose-13C. P addition a...