不同牧草品种对盐碱化草地改良效果研究

Study on Improved Effect of Different Forage Varieties in Saline-alkali Grassland

针对近年来羊草草地利用不合理,载畜量过大,出现不同程度退化和盐碱化的问题,为改善草地植物生存条件,对退化、盐碱化草地进行了种草改良试验研究。结果表明,种植4种牧草后均改善了土壤养分状况,均增加土壤中的氮、磷和钾,敖汉苜蓿效果最佳,总氮和速效氮含量分别增加0.50%和31.91 mg/kg,土壤中全磷和速效磷含量分别增加0.252%和11.33 mg/kg,土壤中速效钾含量增加24.37 mg/kg;含盐量和pH均有不同程度地降低,最佳是碱茅,含盐量和pH分别下降0.058%和0.9,其次为军需1号野大麦,含盐量和pH分别下降0.04%和0.74。适应性强,抗旱、抗寒、耐盐碱,产量高、品质好。

The grassland of Leymus chinensis was saline-alkalized and degraded because of unreasonable utilization and overgrazing .To improve the living condition of grassland plant, the experiment of improving degraded and saline-alkaliz grassland was carried out. The results showed that the nutrition condition of soil was improved after planting 4 kinds of forages （Hordeum brevisubulatum （Trig） Link.cv.Junxu No.1, Legmus chinensis, Medicago sativa L. and Puccinellia chinampoensis） which all increased the content of N, P, K in soil, and Medicago sativa L. was the best, the total and available Nitrogen contents were increased by 0.50% and 31.91 mg/kg respectively, total and available phosphorus contents were increased by 0.252% and 11.33 mg/kg respectively, available potassium content was increased by 24.37 mg/kg. Salt content and pH decreased to different extent. Puccinellia chinampoensis was the best, its salt content and pH were decreased by 0.058% and 0.9 respectively, followed by Hordeum brevisubulatum （Trin.） Link.cv.Junxu No.l, which salt content and pH were decreased by 0.04% and 0.74 respectively. All the 4 kinds of plants had many advantages such as strong in adaptation, drought resistance, cold resistance, salt tolerance, high yield and good quality.