塔尔巴克台山东段山区豆禾混播草地的土壤理化性质

Soil physical and chemical properties of different mix-sown combination pasture

对建植3年的以线叶豌豆(Vicia tenuifolia)、紫花苜蓿(Medicago sativa)、红豆草(Onobrychis viciaefolia)、猫尾草(Phleum pratense)、冰草(Agropyron cristatum)、鸭茅(Dactylis glomerata)6种豆禾牧草在混播种类为3、4、5、6与豆禾混播比例为4∶6的草地(T1~T6)为对象,研究其土壤0-20 cm土层理化性质。结果表明,各混播组合相比对照(CK),会对土壤理化性质产生不同影响,其中T1(线叶豌豆+紫花苜蓿+红豆草+猫尾草+冰草+鸭茅)和T3(线叶豌豆+紫花苜蓿+猫尾草+冰草+鸭茅)0-10 cm的含水量、容重相比CK差异显著(P【0.05)。0-20cm有机质、碱解氮、速效磷、速效钾含量相比CK差异显著(P【0.05);综上,各组合中T1和T3相比CK更有利于维护草地土壤稳定性,适宜在当地和类似生境条件下推广。

The soil physical and chemical properties of 0- 20 cm soil lay in mix-sown pasture which has been constructed 3 years by six different kinds of Legumionosae and Gramineae herbage( Vicia tenuifolia,Medicago sativa,Onobrychis viciaefolia,Phleum pretense,Agropyron cristatum,Dactylis glomerata) were studied. The mix-sowed type numbers were 3,4,5,6 and proportion of Legumionosae and Gramineae was 4∶ 6. The results showed that all mix-sown combinations had different impacts on soil physical and chemical properties comparing with CK. The water content in 0- 10 cm soil,bulk density of T1( V. tenuifolia +M. sativa +O. viciaefolia +P. pretense +A. cristatum+ D. glomerata) and T3( V. tenuifolia + O. viciaefolia + P. pretense + A. cristatum + D. glomerata) were significant higher( P < 0. 05) than that of the control. In 0- 20 cm layer,the soil organic matter,available nitrogen,available phosphorus,available potassium of T1 and T3were significant higher than that of other mix-sown combinations and control( P < 0. 05). The results indicated T1 and T3treatment were more beneficial for maintaining grassland soil stability and suitable for local and similar habitat conditions.