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Journal of Zhejiang University SCIENCE A 2002 Vol.3 No.2 P.209~215

http://doi.org/10.1631/jzus.2002.0209


Field investigation on effects of wheat-straw/corn-stalk mulch on ecological environment of upland crop farmland


Author(s):  DONG Zhi-yong, QIAN Bing-fa

Affiliation(s):  College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China

Corresponding email(s):   dongzy@mail.hz.zy.cn

Key Words:  Wheat-straw/Corn-stalk mulch, Upland crop, Mulch rate, Soil moisture, Soil temperature, Crop yields, Weeds control, Water-saving role


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DONG Zhi-yong, QIAN Bing-fa. Field investigation on effects of wheat-straw/corn-stalk mulch on ecological environment of upland crop farmland[J]. Journal of Zhejiang University Science A, 2002, 3(2): 209~215.

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DOI - 10.1631/jzus.2002.0209


Abstract: 
This work systematically investigates the effects of wheat-straw/Corn-stalk mulch on the ecological environment in upland crops (winter wheat, summer corn) field from 1997 to 1998. With and without mulch soil moisture distribution, water demand, day and night variation of soil temperature, weeds control, crop yields, water and soil conservation, as well as improvement of soil texture were experimentally investigated. The optimal mulch rate for both water saving and yield-increase was determined. Ineffective interplant evaporation can be turned into effective transpiration of leaf by application of wheat-straw/Corn-stalk mulch, which enhances the utility factor of soil moisture and reduces irrigation norm, and may also regulate soil temperature, increase soil fertility, and improve soil texture after being returned to the field. wheat-straw/Corn-stalk mulch inhibits evaporation of moisture so that accumulation of salinity near the soil surface is prevented, and thus ameliorates salinization of land. In the region of severe soil erosion, mulch is used to cover land so as to forestall hydraulic and wind erosion of the soil.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1] Bristow, K.L., Campbell, G.S., 1986. Simulation of heat and moisture transfer through a surface residue soil system. Agricultural and Forest Meteorology, 36: 193-214.

[2] Dong Zhiyong, 1998. The water saving role of straw mulching farmland in semi-arid and arid areas, proc, Int. Water Resources Engineering Conf. ASCE, Vol.2, Memphis, USA, p.1002-1007.

[3] Horton,R., Aguirre-Luna, O., Wierenga, P.J., 1984. Observed and predicted two-dimensional soil temperature distributions under a crop row. Soil Sci. Soc. Am. J., 48: 1147-1232.

[4] Milly,P., Christopher,D.,1982. Moisture and heat transport in hysteretic, inhomogeneous porous media: A matric head-based formulation and numerical model. Water Resources Research, 18(3): 489-498.

[5] Penman,H.L.,1948. Natural evaporation from open water, bare soil and grass. Proc. Roy. Soc. A. 193: 120-145.

[6] Philip, J.R., de Vries, D.A., 1957. Moisture movement in porous materials under temperature gradients. Transactions of American Geophysical Union, 38(2): 222-232.

[7] Sophocleous, M., 1979. Analysis of water and heat flow in unsaturated porous media. Water Resources Research, 15(5): 1195-1206.

[8] Van Bavel, C.H.M., Hillel, D.I., 1957. Calculating potential and actual evaporation from a bare soil surface by simulation of concurrent flow of water and heat. Agricultural Meteorology, 17: 453-476.

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