Effects of Different Ratio of the Mixed Soils on Soil Physiochemical Properties and Spring Maize Yield for Agricultural Land Engineering in the Loess Plateau

Authors: Yunxin Huang*,
Topics: Soils, Agricultural Geography, Cultural Ecology
Keywords: foreign soil-improving technology, soil Physiochemical properties, maize yield, Loess Plateau
Session Type: Paper
Day: 4/6/2019
Start / End Time: 3:05 PM / 4:45 PM
Room: Truman, Marriott, Mezzanine Level
Presentation File: No File Uploaded

Recently, the ‘Gully Land Consolidation Project’ in the Loess Plateau was implemented, which increased farmland, improved rural production and living conditions. Throughout project implementation, the theory and technology of soil quality improvement of newly-increased farmland need to be studied for practical applications in the future. In this paper, a field experiment was conducted in the Yangjuangou catchment, to explore the effects of different loess cover thicknesses on both the soil physiochemical properties and spring maize crop yield. Also, this study analyzes the configuration of land suitability and crop physiological adaptive matching scheme, and provides a quick and efficient way to improve quality of new cultivated land. Our results show that maize yield is greatest with 5 cm of Red Clay (RC), followed by CK site, and is lowest when there is 15 cm of RC. In addition, with the increase of RC overburden soil thickness, the clay volume proportion gradually increases and becomes obvious. Meanwhile, with the increase of soil thickness of RC, the value of several soil properties significantly increases, such as soil bulk density (BD), clay percentage (CP), soil penetration resistance (SPR), soil water content (SW), soil organic matter (SOM), available potassium (AK), and available nitrogen (AN), while soil total porosity (TP) and sand percentage (SP) decrease at the same time. These findings not only enrich our understanding of the effect of different loess cover thicknesses on soil physiochemical properties, but also provide engineering parameters and suggestions for the agricultural geographic engineering.

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