Water-salt Dynamic in Inland Saline-alkali Soil: Monitoring and Regulation and Decision-making System

doi:10.11924/j.issn.1000-6850.casb2020-0042

Abstract

Abstract:

The objective is to study water-salt transport law in the inland saline-alkaline soil, develop a water-salt control decision-making system, and provide a theoretical basis and practical software for the reasonable water-salt control in inland saline-alkaline. The shallow groundwater depth, the salt content of groundwater, soil moisture, soil salinity, and ion composition of multi-year and multi-site were monitored and analyzed. The law of water-salt movement in saline-alkali land was studied, the technical system of water-salt regulation was constructed systematically, and related decision-making system was developed. The results showed that the main performance of water-salt movement in the inland saline-alkali soil was transporting and transforming of three forms: salt accumulation, salt desalination and relatively stable. The key of water-salt regulation was controlling and reducing the salt content in soil at salt accumulation peak. This water-salt control scheme was feasible and effective on space-time salt avoidance, and could reduce the cost of soil improvement and the interference to environment. The study, by information technology, explored the law of water-salt in inland saline-alkaline soil and put it into application, and promoted the water-salt regulation.

Key words: water-salt regulation, inland alkali soil, decision system, water-salt monitoring, water-salt transport, Xinjiang saline-alkali area

CLC Number:

S156.4+1

Wang Bin, Huang Gaojian, Liu Wei, Li Rongxia, Nie Du, Zhang Qiang. Water-salt Dynamic in Inland Saline-alkali Soil: Monitoring and Regulation and Decision-making System[J]. Chinese Agricultural Science Bulletin, 2020, 36(23): 81-87.

Figures/Tables 14

References 28

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深度/cm	EC(mS/cm)	pH	全盐量/(g/kg)	CO₃^2-/(g/kg)	HCO₃^-/(g/kg)	SO₄^2-/(g/kg)	Cl^-/(g/kg)	Ca²⁺/(g/kg)	Mg²⁺/(g/kg)	Na⁺/(g/kg)
0~10	1.42	8.9	3.65	5.85	1.99	15.18	9.45	2.31	0.12	17.10
10~20	1.35	8.7	1.82	5.52	0.31	10.61	5.14	2.05	0.13	8.51
20~40	0.85	8.6	1.63	1.93	0.19	9.45	3.47	2.11	0.09	4.53
40~60	0.71	8.6	1.21	2.14	0.27	9.09	3.52	2.08	0.10	4.32
60~80	0.91	8.7	1.18	2.10	0.54	9.11	3.14	2.12	0.11	4.29
80~100	0.68	8.7	1.07	1.15	0.63	8.74	3.42	2.30	0.14	4.85

深度/cm	EC(mS/cm)	pH	全盐量/(g/kg)	CO₃^2-/(g/kg)	HCO₃^-/(g/kg)	SO₄^2-/(g/kg)	Cl^-/(g/kg)	Ca²⁺/(g/kg)	Mg²⁺/(g/kg)	Na⁺/(g/kg)
0~10	1.42	8.9	3.65	5.85	1.99	15.18	9.45	2.31	0.12	17.10
10~20	1.35	8.7	1.82	5.52	0.31	10.61	5.14	2.05	0.13	8.51
20~40	0.85	8.6	1.63	1.93	0.19	9.45	3.47	2.11	0.09	4.53
40~60	0.71	8.6	1.21	2.14	0.27	9.09	3.52	2.08	0.10	4.32
60~80	0.91	8.7	1.18	2.10	0.54	9.11	3.14	2.12	0.11	4.29
80~100	0.68	8.7	1.07	1.15	0.63	8.74	3.42	2.30	0.14	4.85