Research Status and Prospects of Saline-alkali Land Amelioration in the Coastal Region of China

doi:10.11924/j.issn.1000-6850.casb2021-0255

Abstract

Abstract:

Under the background of cultivated land resource shortage and an increasing contradiction between human and land in east China, it is urgent to increase cultivated land to ensure a ‘balance of occupation and compensation’. Coastal saline-alkali land, as a potential land reserve resource, has strategic and practical significance by its rational development and utilization to alleviate the pressure of land resource shortage, improve agricultural water resource utilization efficiency and ecosystem stability. This paper introduced the current situation and main characteristics of coastal saline-alkali land resources, and summarized the recent research progress and existing problems of coastal saline-alkali land improvement and utilization from the physical, chemical, hydraulic engineering and biological aspects, and put forward the research prospect of coastal saline-alkali land in the future from biophysical process, obstacle reduction, soil fertility improvement and nutrient expansion, development and application of new materials, soil carbon sequestration, and comprehensive management and remediation, aiming to provide new ideas, new technologies and theoretical support for coastal saline-alkali soil improvement under the background of ecological civilization in the new era.

Key words: coastal saline-alkali land, resource status, typical features, soil amelioration, research prospect

CLC Number:

S156.4

ZHAO Ying, WANG Li, ZHAO Huili, CHEN Xiaobing. Research Status and Prospects of Saline-alkali Land Amelioration in the Coastal Region of China[J]. Chinese Agricultural Science Bulletin, 2022, 38(3): 67-74.

Figures/Tables 3

References 50

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海岸	总面积/×10⁴ hm²		比例/%	构成/%
海岸	总面积/×10⁴ hm²		比例/%	滨海滩涂	沼泽	河漫滩
总计		217.09	100	80.6	14.5	4.9
渤海沿岸	小计	68.04	31.3	75.1	17.5	7.4
	辽宁部分	24.18	35.5	70.7	29.3	—
	河北部分	11	16.2	70.2	26	3.8
	天津部分	5.87	8.6	63.7	23.5	12.7
	山东北部	26.99	39.7	83.7	1.9	14.4
南黄海岸	小计	58.2	26.8	79.3	20.4	0.3
	山东东部	6.88	11.8	92.1	5.9	2
	江苏部分	51.32	88.2	77.6	22.4	—
东部海岸	小计	55.49	25.6	84.5	6.3	9.2
	上海部分	6.15	11.1	72.7	27.3	—
	浙江部分	28.86	52	79.7	5	15.3
	福建部分	20.49	36.9	94.8	1.8	3.4
华南沿海	小计	35.36	16.3	86.8	12.3	0.9
	广东部分	20.42	57.8	89.8	9.6	0.6
	海南部分	4.89	13.8	80.8	15.1	4.1
	广西部分	10.05	28.4	83.7	16.3	—

海岸	总面积/×10⁴ hm²		比例/%	构成/%
海岸	总面积/×10⁴ hm²		比例/%	滨海滩涂	沼泽	河漫滩
总计		217.09	100	80.6	14.5	4.9
渤海沿岸	小计	68.04	31.3	75.1	17.5	7.4
	辽宁部分	24.18	35.5	70.7	29.3	—
	河北部分	11	16.2	70.2	26	3.8
	天津部分	5.87	8.6	63.7	23.5	12.7
	山东北部	26.99	39.7	83.7	1.9	14.4
南黄海岸	小计	58.2	26.8	79.3	20.4	0.3
	山东东部	6.88	11.8	92.1	5.9	2
	江苏部分	51.32	88.2	77.6	22.4	—
东部海岸	小计	55.49	25.6	84.5	6.3	9.2
	上海部分	6.15	11.1	72.7	27.3	—
	浙江部分	28.86	52	79.7	5	15.3
	福建部分	20.49	36.9	94.8	1.8	3.4
华南沿海	小计	35.36	16.3	86.8	12.3	0.9
	广东部分	20.42	57.8	89.8	9.6	0.6
	海南部分	4.89	13.8	80.8	15.1	4.1
	广西部分	10.05	28.4	83.7	16.3	—