Simulation of Soil Organic Carbon Effects on Long-Term Winter Wheat (Triticum aestivum) Production Under Varying Fertilizer Inputs.
Simulation of Soil Organic Carbon Effects on Long-Term Winter Wheat (Triticum aestivum) Production Under Varying Fertilizer Inputs.
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DOI：
10.3389/fpls.2018.01158
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发表时间：
2018
影响因子：
5.6
通讯作者：
Porter JR
中科院分区：
文献类型：
--
作者：
Ghaley BB;Wösten H;Olesen JE;Schelde K;Baby S;Karki YK;Børgesen CD;Smith P;Yeluripati J;Ferrise R;Bindi M;Kuikman P;Lesschen JP;Porter JR
土壤有机碳对提高农业生产力和减缓气候变化具有重要作用。为了量化SOC对生产力的影响，过程模型作为一个强大的工具，以跟踪多个植物和土壤因子及其相互作用影响SOC动态。利用土壤-植物-大气模型DAISY，研究了不同施氮水平下有机碳对丹麦冬小麦氮素供应和植物有效水的影响。研究目的是在3个SOC水平（低：0.7%SOC;参考：1.3%SOC;和高：2%SOC）下，在5个施氮水平（0-200 kg N ha-1）和低、参考和高SOC水平下的PAW下，评估SOC对冬小麦籽粒和地上生物量积累的影响。3个SOC水平仅在0-100 kg N ha-1时对籽粒产量和地上生物量积累有显著影响，且SOC效应随施氮量的增加而降低，直至150-200 kg N ha-1时无效应。土壤有机碳含量与土壤PAW呈显著正相关，土壤有机碳含量越高，土壤PAW越高，土壤PAW与土壤有机碳含量的平均相关性为PAW% = 1.0073 × SOC% + 15.641。对于0.7- 2%SOC范围，PAW增加较小，对籽粒产量和地上生物量积累没有显著影响。低氮条件下冬小麦籽粒产量和地上部分生物量的增加主要是由于氮素供应量的增加。我们的研究表明，建设SOC提高农艺生产力只有0-100公斤氮公顷。维持有机碳库存需要定期补充有机碳，以补偿矿化过程中有机碳随时间的降解。因此，管理可以最大限度地实现SOC的好处，通过建立SOC和保持在0-100公斤N ha-1的范围内的N率，以减少非农场N的损失取决于环境区，土地利用和生产系统。
Soil organic carbon (SOC) has a vital role to enhance agricultural productivity and for mitigation of climate change. To quantify SOC effects on productivity, process models serve as a robust tool to keep track of multiple plant and soil factors and their interactions affecting SOC dynamics. We used soil-plant-atmospheric model viz. DAISY, to assess effects of SOC on nitrogen (N) supply and plant available water (PAW) under varying N fertilizer rates in winter wheat (Triticum aestivum) in Denmark. The study objective was assessment of SOC effects on winter wheat grain and aboveground biomass accumulation at three SOC levels (low: 0.7% SOC; reference: 1.3% SOC; and high: 2% SOC) with five nitrogen rates (0–200 kg N ha-1) and PAW at low, reference, and high SOC levels. The three SOC levels had significant effects on grain yields and aboveground biomass accumulation at only 0–100 kg N ha-1 and the SOC effects decreased with increasing N rates until no effects at 150–200 kg N ha-1. PAW had significant positive correlation with SOC content, with high SOC retaining higher PAW compared to low and reference SOC. The mean PAW and SOC correlation was given by PAW% = 1.0073 × SOC% + 15.641. For the 0.7–2% SOC range, the PAW increase was small with no significant effects on grain yields and aboveground biomass accumulation. The higher winter wheat grain and aboveground biomass was attributed to higher N supply in N deficient wheat production system. Our study suggested that building SOC enhances agronomic productivity at only 0–100 kg N ha-1. Maintenance of SOC stock will require regular replenishment of SOC, to compensate for the mineralization process degrading SOC over time. Hence, management can maximize realization of SOC benefits by building up SOC and maintaining N rates in the range 0–100 kg N ha-1, to reduce the off-farm N losses depending on the environmental zones, land use and the production system.
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影响因子：
5.6
作者：
Palmer J;Thorburn PJ;Biggs JS;Dominati EJ;Probert ME;Meier EA;Huth NI;Dodd M;Snow V;Larsen JR;Parton WJ
通讯作者：
Parton WJ
影响因子：
4.2
作者：
Minasny, B.;McBratney, A. B.
通讯作者：
McBratney, A. B.
DOI：
10.2136/sssaj1992.03615995005600010038x
发表时间：
1992-01-01
影响因子：
2.9
作者：
BAUER, A;BLACK, AL
通讯作者：
BLACK, AL
DOI：
10.1007/bf01051122
发表时间：
1991-03-01
期刊：
FERTILIZER RESEARCH
影响因子：
--
作者：
DEWILLIGEN, P
通讯作者：
DEWILLIGEN, P
影响因子：
64.8
作者：
Paustian, Keith;Lehmann, Johannes;Smith, Pete
通讯作者：
Smith, Pete