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本文报导了二年围田蓄淡养鱼改良滨海盐土的效果,初步结果如下:(1)对于强度盐渍化土壤(土壤全盐含量为0.4—0.6%)采取本试验的改良方法效果甚佳,二年总脱盐率为50—75%;(2)二年中各可溶性离子减少速度顺序为Cl~->SO_4~=,HCO_3~-反而增加,Na~+>K~+>Mg~(++),Ca~(++)略有增加,土壤由Na~6—Cl~-型向Ca~(++),Mg~(++)—HCO_3~-,SO_4~=型转化;(3)土壤有机质、全氮积累明显,前者从8.0—9.cg kg~(-1)提高到12g kg~(-1)以上,后者从0.2g kg~(-1)提高到0.4—0.6g kg~(-1).水改二年后该滨海盐土已基本具有作为农业利用的土壤条件.
This paper reports the effect of two years of remediation on the improvement of seashore saline soil. The preliminary results are as follows: (1) The improved method of this test is very good for the salinity soils (soil total salt content 0.4-0.6%) , And the total desalination rate in two years was 50-75%. (2) The decreasing rates of soluble ions in two years were Cl ~ -> SO_4 ~ =, HCO_3 ~ - but Na ~ +> K ~ + Mg ~ ++) and Ca ~ (++) increased slightly. The soil was transformed from Ca ~ (++), Ca ~ (++) - HCO_3 ~ - and SO_4 ~ 3) The accumulation of soil organic matter and total nitrogen was obvious, the former increased from 8.0-9.cg kg -1 to above 12g kg -1, while the latter increased from 0.2g kg -1 to 0.4-0.6 g kg ~ (-1). After two years of water change, the coastal saline soil has basically had soil conditions for agricultural use.