不同改良措施对草原土壤理化性质的影响

为探索吉林省西部退化草地的治理修复技术,复壮退化草地,通过田间试验的方法,研究了不同措施对草原土壤理化性质的改良效果。结果表明,不同改良措施均对土壤理化性质的改善有较好的效果,其中施用秸秆处理对提高土壤水稳性团聚体含量效果最好,比对照提高了34.5%,土壤团聚体破坏率比对照降低了22.7%;各处理对降低土壤容重均有较好效果,围栏内土壤的碱化度比不围栏降低了31.7%,其它各改良措施降低碱化度的作用更明显;草原土壤磷、钾肥较为缺乏,而且单纯的施用化肥效果并不好,需要配合有机肥的施用才能有效提高土壤肥力。

Effects of Different Improve Measures on Soil Physical and Chemical Character of Grassland Soil

In order to search the harness and renew technique for degraded grassland of western Jilin province soil and rejuvenation the degraded grassland,field experiment was carried to search the effects of different improve measures to the soil physical and chemical character of grassland.The results indicated that each kind of technique is effective to the improve of grassland soil,applying cornstalk into soil had the best effect on increasing the quantity of water steady accumulation.increased 34.5%compare to CK.soil accumulation destroy rate decreased 22.7%.Each kind of technique is effective to decrease the soil bulk density;enclosure reduced 3 1.7%of ESP.The grassland soil is short of phosphorus and potassium,applying organic fertilizer accompany with chemical fertilizer is more effective than applying chemical fertilizer.