林农复合经营对土壤物理性质的影响

Effect of Agroforestry on Soil Physical Property

在黑龙江省拜泉县三道镇革新村选取林—粮(落叶松Larixgmellini(Rupr.)Rupr.+美国红芸豆)、林—药(杨树+水飞蓟Silybum marianum(L.)Gaertn.)、林—药(杨树+板蓝根Isatis indigotica Fort.),以及纯农(马铃薯Solanum tuberosum)和纯林(云杉Picea koraiensis)5块具有代表性的样地,对林农复合类型对土壤物理性质的影响进行了研究。结果表明:杨树—板蓝根的复合类型土壤的容重为1.38 g.cm-3、总孔隙度39.2%、田间持水量为69.2%、质量含水量为202.2 g.kg-1、最大持水量为18.1 mm,均是几种样地最好的;而杨树—水飞蓟和纯农类型土壤的上述几个物理指标均较差。

Taking 5 plots （ forest and grain of larch-American red kidney bean, forest and herb of poplar-Silybum marianum and poplar-dyer＇s woad root, pure farming of potato,pure forest of spruce） in Baiquan county as research objects, the effect of each type of agroforestry on soil physical properties is studied. The results show that the soil bulk specific gravity of the poplar-dyer＇s woad root is 1.38g · cm^-3, and total porosity is 39.2%, and field moisture capacity is 69.2%, and the soil water content is 202.2 g · kg^-2 , and the max moisture capacity is 18. lmm. They are all the best of the five. Several physical indices of soil of peplar-Silybum marianum and pure farming are worse.