Characteristics of Non-Point Source N Export via Surface Runoff from Sloping Croplands in Northeast China

摘要:

文章预览

A field experiment was conducted to study the characteristics of non-point source nitrogen (N) in the surface runoff from sloping croplands and the influences of rainfall and cropland slope gradient. The results showed that dissolved total N (DTN) was the major form of N in the runoff, and the proportion occupied by dissolved inorganic nitrogen (DIN) ranged from 45% to 85%. The level of NH4+-N was generally higher than the level of NO3--N, and averaged at 2.50 mg·L-1 and 1.07 mg·L-1 respectively. DIN was positively correlated with DTN (R2=0.962). Dissolved organic N (DON) presented a moderate seasonal change and averaged at 1.40 mg·L-1. Rainfall amount and rainfall intensity significantly affected the components of DTN in the runoff. With the increase of rainfall amount and rainfall intensity, the concentrations of DTN, NH4+-N and NO3--N presented a decreased trend, while the concentration of DON showed an increased trend. N loss went up with an increase in the gradient of sloping cropland, and was less when the duration was longer from the time of N fertilization.fertilization.

信息:

期刊:

编辑:

Weiguo Pan, Jianxing Ren and Yongguang Li

页数:

2302-2307

DOI:

10.4028/www.scientific.net/AMR.347-353.2302

引用:

H. X. Wang et al., "Characteristics of Non-Point Source N Export via Surface Runoff from Sloping Croplands in Northeast China", Advanced Materials Research, Vols. 347-353, pp. 2302-2307, 2012

上线时间:

October 2011

输出:

价格:

$35.00

[1] Z.L. Zhu, D.L. Chen: Nutrient Cycl. Agroeco. Vol. 63(2002), pp.117-127.

[2] W.W. Zhang, M.J. Shi, ZH. Huang: Sustain Sci. Vol. 1(2006), pp.83-89.

[3] Information onhttp: /http: /nf. nfdaily. cn/epaper/nfzm/content/20100121/ArticelC10002FM . htm.

[4] Y.R. Wu : China Agri. Econ. Review, Vol. 3(2011) , pp.117-130.

[5] S.P. Seitzinger, J.A. Harrison, Egon. Dumont, Arthur H.W. Beusen, A.F. Bouwman: Glob. Biogeochem. Cycle. Vol. 19(2005), pp.1-11.

[6] J.A. Camargo, A. Alonso: Environ Int., Vol. 32(2006), pp.831-849.

[7] D.H. Yuan, Z.Q. Wang, X. Chen, X.B. Guo, R.L. Zhang: Chinese J. Appl. Eco. Vol. 13(2002), pp.863-866.

[8] Z.F. Chen, Y. Zhao: Res. Soil Water Cons. Vol. 3(2010), pp.2587-2593.

[9] X. Ke, W.K. Yu, W. Yin, A.L. Lei, R.D. Li: Envi. Sci. Tech. Vol. 32(2009), pp.201-205.

[10] H.Y. Li, Q. Wang, Y.H. Shi: Proceedings of SPIE-The International Society for Optical Engineering (2010), p.7752.

[11] N.W. Chen, H.S. Hong: Biogenchem. (2010), DOI 10. 1007/s10533-010-9514-6.

[12] R.K. Lu: China Agricultural Science and Technology Press, Beijing, China, (2000).

[13] Liang DL, Fang RY, Li SX, X.C. Zhang, ove Emteryd: Agri. Res. Arid Areas. Vol. 25(2007), pp.67-72.

[14] F.J. Chen, G.D. Jia, J.F. Chen, H. S Zhang: Bulletin Miner. Petro. Geochem. Vol. 29(2010), pp.83-88.

[15] W.Z. Huang, J.J. Schoenau: Geoderma, Vol. 81(1998), pp.251-264.

[16] Liu LM, Long TY, Li CM, J.C. Li, J. Agro-Env. Vol. 28(2009), pp.808-813.

[17] H.M. Xie, B. Zhu: Eco. & Envi. Vol. 12(2003), pp.349-352.

[18] L.P. Chu, J.H. Yang, W.G. Ma: Guide Sci. Endu. Vol. 12(2010), pp.75-76.

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