全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
地理科学  2006 

区域农业用地营养盐剩余量的长期变化研究

, PP. 668-673

Keywords: 农业用地,营养盐,剩余量,长期变化,长兴县

Full-Text   Cite this paper   Add to My Lib

Abstract:

根据太湖南部长兴县农业统计资料,对该地区1949~2002年农业用地上N、P的剩余量作出评估。评估结果认为,1949~2002年期间,单位农业用地面积的N、P剩余量具有显著地增加趋势。20世纪50及60年代期间,N的剩余量增加缓慢,自70年代中期以后增加迅速。1996年达到历史最大值。1996年后,N剩余量呈现减少趋势。60年代初期以前,P处于亏损状态。1975~1980年期间,P剩余量呈现缓慢增长趋势,其后出现回落,自80年代中期以后出现迅速增加趋势。1992~1998年期间,P剩余量维持在35~45kg/(hm2·a)之间的高水平变化,自1999年以后出现显著回落。

References

[1]  Zessner M,van Gils J.Nutrient fluxes from the Danube basin to the Black Sea[J].Wat Sci Tech,1999,46 (8):9-17.
[2]  Behrendt H,Huber P,Kornmilch M,et al.Nutrient Emissions into River Basins of Germany[M].Berlin:UBA-Texte,82/03,2000.
[3]  Schreiber H,Constantinescu L H,Cvitanic I,et al.Harmonised Inventory of Point and Diffuse Emissions of Nitrogen and Phosphorus for a Transboundary River Basin[M].Berlin:Research Report 20022232,Water Research Project,Environmental Research of the Federal Ministry of the Environment,Nature Conservation and Nuclear Safety,2003.
[4]  Behrendt H,Dannowski R (eds).Nutrients and Heavy Metals in the Odra River Systems[M].Berlin:WeiBensee Verlag,2005.
[5]  邢光熹,朱兆良.中国集水区氮源和汇的分析与估算[J].土壤学报,2000,37(增刊):72~83
[6]  Xing G X,Zhu Z L.Regional nitrogen budgets for China and its major watersheds[J].Biogeochemistry,2002,57/58:405-427.
[7]  Bao X,Watanabe M,Wang Q X,et al.Nitrogen budgets of agricultural fields of the Changjiang River basin from 1980 to 1990[J].Sci Tot Envir,2006,363:136-148.
[8]  Somloydy L,Brunner P H,Kroi B H.Nutrient balances for Danube countries:a strategic analysis[J].Wat Sci Tech,1999,40 (10):9-16.
[9]  OECD.OECD National Soil Surface Nutrient Balances:1985 to 1996,Explanatory Notes[M].Paris:OECD Secretary,1997.
[10]  Behrendt H,Bach M,Kunkel R,et al.Nutrient Emissions into River Basins of Germany on the Basis of a Harmonized Procedure[M].Berlin:Research Report 29922285,Water Research Project,Environmental Research of the Federal Ministry of the Environment,Nature Conservation and Nuclear Safety,2003.
[11]  Bouwman A F,Van Drecht G,Van der Hoek K W.Global and regional surface nitrogen balances in intensive agricultural production systems for the period 1970-2030[J].Pedosphere,2005,15 (2):137-155.
[12]  Zhu Z L.Nitrogen balance and cycling in agroecosystems of China[A].In:Zhu Z L,Wen Q X,Freney J R (eds).Nitrogen in Soil of China[M].Dordrecht/Boston/London:Kluwer Academic Publishers,1997.323-330
[13]  Shen R P,Sun B,Zhao Q G.Spatial and temporal variability of N,P and K balances for agroecosystems in China[J].Pedosphere,2005,15 (3):347-355.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133