Effects of Different Modified Materials on Physical Properties of Clayey Saline Soil and Yield of Cotton

doi:10.11924/j.issn.1000-6850.casb17010108

Abstract

Abstract: In order to determine the improving effect of different types of modified materials on the physical properties of coastal saline soil, a field experiment was carried out in the coastal saline soil area of the Yellow River Delta, two sedimentation amount were set up, which were 20, 40 t/hm2, three diatom mud amount were set up, which were 1.0, 3.5 and 4.0 t/hm2 and controlled trials, The effects of different modified materials and treatments on soil bulk density, porosity, saturated hydraulic conductivity, soil water and salt content, growth and cotton yield were analyzed. The results showed that there was no significant difference in soil bulk density and total porosity in 0-20 cm soil layer; the large pore ratio of the three diatom mud treatments decreased by 0.51%, 2.53% and 4.75% compared with that of CK, the saturated hydraulic conductivity decreased by 1.18%, 15.88%, 22.65%, the soil salt content decreased by 62.76%, 72.01% and 75.76%, respectively (P<0.05),and the cotton yield decreased by 2.8%, 5.0% and 11.1%, respectively; the large pore ratio of the two sedimentation treatments increased by 17.75% and 37.09% compared with that of CK, the saturated hydraulic conductivity decreased by 17.94% and 60.29%,respectively (P<0.01), the soil salt content decreased by 23.17% and 25.08%, respectively (P<0.05), and the cotton yield increased by 11.1% and 16.7%, respectively. Yellow River sediment can effectively improve the soil texture and pore conditions, increase soil saturated hydraulic conductivity, suitable for improving the physical properties of clayey soil. Diatom mud is not suitable for the improvement of physical properties of clay. Therefore, the key to improve the clayey soil is to select the material that can increase the quantity and proportion of soil macropores and increase the saturated hydraulic conductivity of soil.

CLC Number:

S156.4

Jia Limei,Mao Weibing,Sun Yuxia,Zheng Qiankun and Chang Hongjuan. Effects of Different Modified Materials on Physical Properties of Clayey Saline Soil and Yield of Cotton[J]. Chinese Agricultural Science Bulletin, 2017, 33(13): 81-87.

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