滨海盐碱土壤改良技术

Study on Ameliorative Technology of Coastal Saline-alkali Soil

为了研究不同改良剂对滨海盐碱土壤的改良效果,采用有机改良剂、沸石和园林废弃物3种改良剂的组合,通过5种不同的配比处理对河北省黄骅市中捷友谊农场的滨海盐碱土进行改良,通过田间试验,改良1年后取样,测定8大离子含量及土壤总盐分,探讨3种改良剂的对滨海盐碱土的改良效果。结果表明:5种处理均能显著降低滨海盐碱地的总盐分含量,与对照相比,T4、T5、T1、T2、T3分别降低了65.03%、47.48%、47.34%、45.24%、41.78%;T4处理下土壤总盐分含量显著低于其他4种处理;5种处理均能显著降低Na+含量,与对照相比,T4、T5、T3、T2、T1分别降低了69.55%、65.43%、62.96%、57.61%、54.73%;5种处理均能显著降低Cl^-含量,与对照相比,T4、T5、T1、T3、T2分别降低了76.35%、64.97%、61.49%、55.84%、50.17%;T4处理还能够显著降低K^+、Ca^(2+)、Mg^(2+)和SO_4^(2-)含量,与对照相比,分别降低了93.33%、76.09%、68.75%、55.01%。

In order to evaluate the effects of different organic and inorganic amendments on coastal saline-alkaline soil, an experiment was conducted with three materials, which are organic soil a- mendment, zeolite and garden waste. In this study, all of the treatments were carried out in the field on Bilateral Friendship Farm in Hebei. Content of soluble salt ions was measured at regular intervals to assess the desalination by five treatments. The effects of three materials on saline-alkali soil were studied to obtain the best combination by five treatments.The results showed that all of the treatments had significant effects on the desalination （P〉0.05）. Compared with the control, the desalting rati- os ofT4, T5, T1, T2 and T3 were 65.03%, 47.48%, 47.34%, 45.24% and 41.78%, and T4 had a better effect on the desalination than T1, T2, T3 and T5. In addition, application of five treat- ments into soil could significantly decrease the available content of Na^＋ and Cl-. Compared with the control, Na^＋content ofT4, T5, T3, T2 and T1 reduced by 69.55%, 65.43%, 62. 96%, 57.61% and 54. 73%, and Cl-content of T4, T5, T1, T3 and T2 reduced by 76.35%, 64. 97%, 61.49%, 55.84% and 50. 17%. Besides, T4 could significantly decrease the available content of K^, Ca^2＋ , Mg^2＋ and SO4^2-. Compared with the control, K^, Mg^2＋, Ca^2＋and SO4^2-content reduced by 93.33%, 76.09%, 68.75% and 55.01%, respectively.