摘要
在河北沽源张家口农牧交错带研究了围封、浅耕翻改良措施对退化天然羊草草甸草地土壤物理性状的影响。结果表明,与自由放牧相比,围封、浅耕翻处理均可以明显改善草地土壤物理性状,提高了土壤含水量、土壤总空隙度、>0.25 mm粒径的水稳性团聚体的含量及团聚体结构稳定系数,显著降低了土壤容重;与浅耕翻处理相比,围封处理对退化羊草草甸草地土壤物理性状的改善最为有利。
The effects of enclosuring and shallow ploughing on soil physical properties were studied in Guyuan grassland, Zhang Jiakou, Herbei Province, The results showed that： compared with overgrazing plots, encloure and shallow plough treatments could obviously improve the soil physical properties, increase soil water content, soil porosity, the content of.soil aggregate （ 〉 0.25mm） and soil aggregate stability, and reduce soil bulk density in the 10 - 20cm and 20 - 30cm surface layer. Compared with shallow ploughing treatment, enclosuring is the most practical way to improve soil physical properties of degraded grazing grassland.
出处
《草业与畜牧》
2009年第1期8-10,18,共4页
Pruataculture & Animal Husbandry
关键词
土壤团聚体
土壤容重
放牧
Soil aggregate
Soil bulk density
Grazing
