干旱区生态环境知识资源中心(Arid): dndc模型模拟干旱区农田有机碳的变化趋势

Arid

	dndc模型模拟干旱区农田有机碳的变化趋势
其他题名	The Change Trend of Soil Organic Carbon in Arid Areas by DNDC Model Simulation
	韩东亮 1; 孙九胜 2; 贾宏涛 1; 王西和 2; 刘骅 2; 朱新萍 1; 许咏梅 2
来源期刊	新疆农业科学
ISSN	1001-4330
出版年	2014
卷号	51 期号:3 页码:485-491
中文摘要	【目的】利用生物地球化学模型,探讨长期不同施肥对干旱区绿洲农田土壤碳变化趋势以及农田的固碳效率。【方法】选择国家灰漠土长期肥力监测试验中的5种处理(hNPKM,NPKM,NPKS、NPK、CK),采用DNDC模型对土壤表层(0~20 cm)土壤有机碳150年(2010~2160年)的长期变化趋势进行预测。【结果】长期不同施肥处理下土壤有机碳固碳效果有明显的差异性,模拟结果表明:土壤有机碳含量与施肥时间之间符合抛物线方程,其中施用连续高量有机肥处理130 a后,土壤有机碳将达到极大值108. 35 g/kg,固碳速率为52.95% ;施用常量有机肥128 a,有机碳达到极大值63. 86 g/kg,固碳速率为28.41% ;秸秆还田处理121年后有机碳达到极大值19.14 g/kg,固碳速率为7.70% ;施用化肥145 a,土壤有机碳达极大值17. 54 g/kg,固碳效率为6.18% ;而CK处理土壤有机碳逐年减少,仅为5.74 k/kg,比试验初始有机碳值降低3.08 g/kg。【结论】化肥与有机肥配施土壤有机碳的固碳速率最高,化肥平衡施肥、化肥与秸秆配施也具有固碳效果,但固碳速率小于化肥有机肥配施,而不施肥土壤有机碳逐渐减少,因此合理施用有机肥和化肥能够实现作物增产和土壤培肥的双赢。
英文摘要	【Objective】 This project aims to explore the soil organic carbon (SOC) change trend and the carbon sequestration efficiency of the arid oasis farmland under long-term different fertilization by using the denitrification-decomposition (DNDC) model.【Method】Five treatments were selected,which belonged to the national gray desert soil long-term fertilizer observation station. The treatments included no fertilizer (CK),applied nitrogen, phosphorus and potassium fertilizer (NPK),hNPKM (M-manure at increased application rate),NPKM (M-manure at normal application rate),and NPKS (S-plant residue returned). The SOC change trend in future 150 years (2010-2160) on the soil surface (0-20 cm) was predicted by using the DNDC model.【Results】 The SOC sequestration effects had significant difference in long-term different fertilizer treatments. Results showed : The relationship between SOC content and fertilization time conformed to the parabolic equation. The SOC of the hNPKM treatment will reach the maximum of 108. 35 g/kg and carbon sequestration rate will be 52. 95% after 130 years; the SOC of the NPKM treatment will reach 63. 86 g/kg, carbon sequestration rate will be 28. 41% after 128 years; the SOC and carbon sequestration rate of the NPKS treatment will be 19. 14 g/kg and 7. 70% after 121 years; and the SOC will be 17. 54 g/kg, carbon sequestration rate will be 6. 18% for chemical fertilizer treatment after 145 years. However, the SOC of CK treatment decreased, which was 5. 74 g/kg and lower than initial value (2. 66 g/kg).【Conclusion】The combination of chemical and organic fertilizer has the highest carbon (C) sequestration rate. Fertilization and combination of chemical fertilizer and straw also has C sequestration efficiency,but the rate was lower than the combination of organic fertilizer and chemical fertilizer. However, the SOC of no fertilization treatment decreased gradually. Therefore, reasonable application of organic and chemical fertilizer can realize win-win situation of crop yield and soil fertility improvement.
中文关键词	DNDC模型 ; 农田有机碳 ; 变化趋势
英文关键词	DNDC model farmland organic carbon change trend
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5120217
来源机构	新疆农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231937
作者单位	1.新疆农业大学草业与环境科学学院, 乌鲁木齐, 新疆 830052, 中国; 2.新疆农业科学院, 绿洲养分与水土资源高效利用国家重点实验室, 乌鲁木齐, 新疆 830091, 中国
推荐引用方式 GB/T 7714	韩东亮,孙九胜,贾宏涛,等. dndc模型模拟干旱区农田有机碳的变化趋势[J]. 新疆农业大学,2014,51(3):485-491.
APA	韩东亮.,孙九胜.,贾宏涛.,王西和.,刘骅.,...&许咏梅.(2014).dndc模型模拟干旱区农田有机碳的变化趋势.新疆农业科学,51(3),485-491.
MLA	韩东亮,et al."dndc模型模拟干旱区农田有机碳的变化趋势".新疆农业科学 51.3(2014):485-491.