不同牧草品种对盐碱化草地改良效果研究

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。

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

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(Trin.) 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.1,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.