种植苜蓿对盐碱地改良效果的影响

Ameliorating Effect of Alfalfa to Saline-alkali Land

在原州区头营镇胡大堡村河床地上种植耐盐苜蓿品种——中苜1号,采用多点取样法进行土壤样品分析和苜蓿产量研究。试验结果表明,在连续7年种植苜蓿过程中,随着种植年限的增加,春、夏、秋三季土壤pH值除第7年夏季比第6年略有增加外,其余均呈下降趋势。种植苜蓿第1~5年土壤全盐含量呈直线下降,从6.7 g/kg下降到1.86 g/kg,脱盐率为72.24%;种植苜蓿第5~7年土壤全盐含量下降速度减慢,从1.86 g/kg下降到1.56 g/kg,脱盐率16.13%。苜蓿产草量呈现先上升后下降的抛物线趋势,草产量最高的时段出现在种植以后第3~5年。说明种植苜蓿对盐碱地改良具有一定效果。

＂Zhongxu-l＂, the haloduric alfalfa cultivar was planted in river-bed land of Hudabu Village, Touying Town, Yuanzhou District, with multidraw to analyze sample soil and alfalfa yield. The result showed that during the 7 years of alfalfa cultivation, except for the 7th year, the pH of the next year was always lower than that of the last year in spring, summer and autumn. From the 1st to 5th year, total salt content decreased from 6.7 g/kg to 1.86 g/kg significantly, with salt rejection of 72.24%; from the 5th to 7th year, total salt content decreased from 1.86 g/kg to 1.56 g/kg softly, with salt rejection of 16.13%. Alfalfa forage yield appeared to be a parabola of increasing at the beginning and decreasing in the end, which showed that alfalfa had worked on Saline-alkali land ameliorating.