Evaluation of the soil quality and the suitability for green food-producing areas in the Xunke Plain, Heilongjiang Province
ZHANG Zhe-Huan1,2,3(), LIU Kai1,2,3, ZHAO Jun4, LIANG Shuai1,2,3, WEI Ming-Hui1,2,3, LIU Yang1,2,3
1. Shenyang Center of China Geological Survey, Shenyang 110034, China 2. Key Laboratory for Evolution and Ecological Effect in Black Land, Ministry of Natural Resources, Shenyang 110034, China 3. Key Laboratory for Evolution and Ecological Effect in Black Land of Liaoning Province, Shenyang 110034, China 4. Xi'an Center of Geological Survey, CGS, Xi'an 710054, China
As per the Specification of Land Quality Geochemical Assessment and the Soil Environment Quality-Risk Control Standard for Soil Contamination of Agricultural Land (Trial), this study evaluated the soil quality of the Xunke Plain and the soil environmental quality of the plain as green food-producing areas using the 1:250 000 geochemical survey data of land quality. The results show that the Xunke Plain has fertile land and an excellent environment and is suitable for the development of green agriculture. ①The Xunke Plain is rich or highly rich in 16 soil nutrients (i.e., N, P, K, organic matter, CaO, MgO, Fe2O3, S, B, Zn, Mn, Cu, Mo, Co, Ge, and V) except for CaO, MgO, Cu, and Zn, which are deficient, and Ge and B, which are highly deficient. This plain mainly has soil nutrients of highly rich and rich comprehensive grades, which cover an area of 6,088 km2 and 4,984 km2, respectively, accounting for 44.58% and 36.5% of the total area of the plain, respectively. ②This plain mainly has the soil environmental quality of risk-free comprehensive grade, which covers an area of 13,600 km2, accounting for 99.59% of the total area of the plain. The portion with controllable risk covers an area of 56 km2, accounting for 0.41%. ③This plain mainly has soil quality of excellent comprehensive grade, which covers an area of 11,028 km2, accounting for 80.76% of the total area of the plain. The land portion with high-quality soil quality has an area of 2,072 km2, accounting for 15.17%, and that with moderate soil quality covers an area of 556 km2, accounting for 4.07%. There is no poor (fourth grade) or inferior (fifth grade) soil in the plain. ④The soil of the Xunke Plain meeting the requirements of Class-I (AA) and Class-II (A) green food-producing areas has an area of 13,396.45 km2 and 148 km2, respectively, accounting for 98.1% and 1.1% of the total area of the plain, respectively. The soil that is unsuitable to be used as green food-producing areas has an area of 112 km2, accounting for 0.8% of the total area of the plain. Overall, the Xunke Plain enjoys sufficient soil nutrients and a clean environment and has great potential for developing as green food-producing areas.
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ZHANG Zhe-Huan, LIU Kai, ZHAO Jun, LIANG Shuai, WEI Ming-Hui, LIU Yang. Evaluation of the soil quality and the suitability for green food-producing areas in the Xunke Plain, Heilongjiang Province. Geophysical and Geochemical Exploration, 2022, 46(5): 1087-1096.
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