Nature Environment and Pollution Technology

Guijun Zhang ¹, Zhi Zhou ¹, Pengtao Zhang ¹, Yigong Zhang ²

Affiliations
1 College of National Land Resource, Agricultural University of Hebei, Baoding, Hebei, 071001, CN
2 College of Resources and Environment, Agricultural University of Hebei, Baoding, Hebei, 071001, CN

Abstract

Degradation of ecological environment and health functions of cultivated land can cause great threats to food safety. In order to effectively promote ecological safety monitoring and protection practices of county cultivated land, factors influencing cultivated land ecological environment in Huanghua City (Hebei Province) were analysed. An ecological security monitoring index system for current cultivated land utilization in China was constructed. A database was constructed, and a safety evaluation was carried out based on the agricultural land classification platform by using the single index evaluation method. Evaluation results overlapped in terms of the spatial consistency between management technologies and monitoring results. Cultivated lands were divided according to safety monitoring results. Corresponding management and monitoring measures were proposed. Results demonstrate the excessive application of chemical fertilizer is the leading threat to cultivated land ecological environment in Huanghua City. Arsenic and Ni content have low safety levels in a part of the region. High attention can be paid to their real-time monitoring. Moreover, cultivated land shortage, low unit yield, and small reserves all intensify pressure on cultivated land ecological environment in Huanghua City. Insufficient soil fertility and freshwater shortage are caused by poor physical and chemical properties of soil, and because of this cultivated land ecological environment in Huanghua City has no material basis. The study provides references to set up ecological safety monitoring system for the county cultivated land and practices.

Keywords

Ecological Safety, Cultivated Land, Farmland Quality, Monitoring and Evaluation, Management and Partition, Huanghua City.

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Guijun Zhang ¹, Congli Wang ², Hongyan Yang ³, Zhi Zhou ¹, Yigong Zhang ², Li Zhao ¹

Affiliations
1 College of Land and Resources, Hebei Agricultural University, Baoding, Hebei, 071001, CN
2 College of Resources and Environmental, Hebei Agricultural University, Baoding, Hebei, 071001, CN
3 Land Resources Bureau of Shijiazhuang City, Shijiazhuang, Hebei, 050051, CN

Abstract

Given the increasing pressure imposed by the social economy upon land supply, the improvement and utilization of saline-alkali soil has been included in the development and remediation plans of land resources. However, coastal saline-alkali land cannot be easily improved because of its simple ecosystem structure, weak ecological environment, and exposure to tide invasion. In order to explore viable improvements and sustainable utilization methods as well as to improve the ecological environment quality and utilization efficiency of coastal saline-alkali land, this study performed field experiments on coastal saline-alkali soil by growing plants in the state-owned Zhongjie Friendship Farm in Huanghua City. In the experiments, salt-tolerant plants were planted in a field without any organic fertilizer and soil conditioner, and their survival rates, growth amounts, and states were subsequently analysed. Twelve plant species with certain salt tolerances were selected. The experimental results demonstrate that Lagerstroemia indica L., Rhus typhina Nutt and Lycium chinense (leaf use) grow well in the field as well as show high adaptability and the highest survival rates (100%) among all selected species. Fraxinus americana (fast-growing), Ligustrum vicaryi and Koelreuteria paniculata Laxm have survival rates of over 85%, while Buxus megistophylla, R. typhina Nutt, Hibiscus syriacus Linn., Parthenocissus semicordata (Wall.) Planch., and Fraxinus chinensis Roxb. have high survival rates ranging from 67.5% to 70%. The experimental results also reveal that the adaptability of salt-tolerant plants to coastal saline-alkali soil is higher than their transformation ability. Root growth also has a certain effect on the improvement of soil fertility. This study provides references for the treatment and sustainable utilization of saline-alkali land in a coastal area with moderate salinization.

Keywords

Saline-Alkali Soil, Coastal Area, Salt-Tolerant Plants, Huanghua City.

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