植物对盐渍土壤改良率的回归分析

种植抗盐耐盐植物能有效地改良盐渍土壤。本文引入土壤改良率的定义,即单位质量的土壤在种植植物一年后的总盐减少量与种植前总盐量的比率。大量试验发现,植物覆盖率的大小、土壤pH值和各种盐分离子浓度都与改良率相关。因而建立回归模型88110)8,,2,1(xbxbbxxxfy+++==LL,分析后证实,植物覆盖率对土壤改良影响最大,其次是其它因子,这一结果与大田试验相符。该模型可应用于盐渍土壤改良植物的筛选与改良效果的评价,进一步指导盐地农业生产实践。统计检验结果表明,增加绿色覆盖是改良内陆盐渍土的有效措施。

Regression analysis of saline soil improvement ratio of plants

Cultivating with saline-tolerant andavoiding plants can effectively improve saline soil. Saline soil improvement ratio was defined as the ratio of reduced content of total saline per unit mass of soil within one year after cultivating plants to the total saline before cultivating in this paper. In line with the close relationshipsof the saline soil improvement ratio to plant coverage, pH value of soil and the concentrations of different saline ions, as proved by many experiments, a regression model, 88110)8,,2,1(xbxbbxxxfy+++==LL, had been developed. The results, which had tallied with the field test, showed that saline soil improvement ratio was most strongly affected by plant coverage than other factors. The regression model would be applied in selection of plant species that can improve saline soil, evaluation of soil improvement effects, and instruction to farming practice. The statistical test suggested that increasing green coverage could be regarded as one of effective ways to improve saline soil in the inland.