JOURNAL OF NATURAL RESOURCES ›› 2018, Vol. 33 ›› Issue (1): 63-74.doi: 10.11849/zrzyxb.20161291

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Soil Structure and Its Effect on Soil Water Holding Property under Three Land Use Patterns in Piedmont Plain of Mountain Tai

WANG Xiu-kang, QI Xing-chao, LIU Yan-li*, LIU Zhi-guang, SONG Fu-peng, LI Cheng-liang   

  1. National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer, College of Resources and Environment, Shandong Agricultural University, Tai’an271018, China
  • Received:2016-11-24 Revised:2017-08-04 Online:2018-01-20 Published:2018-01-20
  • Supported by:
    United Fund of National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer, No. SF2015-5; Doctoral Fund of Ministry of Education of China, No. 2012370212003.

Abstract: Soil water holding capacity, which is controlled by soil structure properties of land uses types with different vegetation and management systems, plays an important role in soil fertilization and crop root development. This study is to explore changes of water holding capacity and soil physicochemical properties in three land use types in piedmont plain of Mountain Tai, such as soil particle composition, particle size distribution, water stable soil aggregate content. Original soil samples in agricultural soil, forest field and barren land in meadow brown soil region and soil water characteristics curves were used to inspect soil water holding capacity, soil water and soil moisture holding, and supply capacity. The soil physicochemical properties affecting soil water holding capacity were identified by step regression and path coefficient method. Results showed that the agricultural soil and forest field had significant higher clay content, organic carbon content and soil capillary porosity and lower aggregate stability than barren land. Agricultural soil had more composition of fine particles and surface area of soil particles than forest field and barren land. The order of field water holding capacity from high to low was agricultural soil, forest field and barren land, which was 31% in agricultural soil and was 15% and 24% more than those in forest field and barren land. There was a power function correlation between the soil moisture and the potential of soil water, which is θ=A·S-B. The value A indicates the intensity of soil water retention with the order from high to low of agricultural soil, forest field and barren land. The order of total available water content and rapid available water percentage from high to low was forest field, agricultural soil and barren land. Step regression and path analysis indicated that soil water retention intensity was positively correlated with soil specific surface area and clay contents and was negative correlated with the stability of soil aggregates. Soil organic carbon played an important role in controlling soil clay content and soil aggregate formation. Consequently, the organic matter input should be increased in order to ameliorate soil structure, and rotation and intercrop should be applied in agricultural and forestry farming in order to improve soil water retention properties. The outcome of this paper provides reference for keeping soil fertility and sustainable application in the region of brown soil.

Key words: land use pattern, Mountain Tai, soil organic carbon, soil particle composition, soil water holding property

CLC Number: 

  • S152