灌草植被荒坡变为芒果园后对土壤水文物理性质的影响

EFFECTS OF SHRUB-GRASS VEGETATION CHANGE THEM INTO MANGO FRUIT GARDEN LATER ON SOIL HYDROLOGY PHYSICAL PROPERTIES

对芒果园及其灌草植被荒坡的土壤水文物理性质进行了对比测定。结果表明 :1～ 4 0cm深度的土壤及容重 ,芒果园为 1 34～ 1 4 5g/cm3,相应比灌草植被荒坡 (1 4 6～ 1 5 0g/cm3)低 0 0 5～ 0 12g/cm3;而在 4 0～ 10 0cm深度 ,两者的土壤容重则基本等值 (1 6 2g/cm3)。 0～10 0cm深度的土壤总孔隙度、通气度、最大持水量和渗透速度的平均值 ,芒果园依次为5 0 15 %、 2 3 2 0 %、 34 2 8和 1 77mm/min ,分别比灌草植被荒坡高 3 4 7%、 5 2 2 %、 2 15 %和0 75mm/min。说明灌草植被荒坡变为芒果园后对改良土壤结构。

In this paper, comparative studies were conducted on soil hydrology physical properties of mango fruit garden and sbrub-grass vegetation. The result showed that the soil volume weight (0～40 cm) of mango fruit garden was 1 34～1 45 g/cm 3, 0 05～0 12 g/cm 3 lower than that of shrub-grass vegetation(1 46～1 50 g/cm 3) repecstively. But the soil volume weight (40～100 cm) were basic eguate(1 62 g/cm 3) of the two. Mean total capillary porosity, men aeration porosity, mean maximum moisture capaity and mean in filtration rate were 50 15%, 23 20%, 34 28%and 1 77 mm/min in proper order, thus 3 47%, 5 22%, 2 15% and 0 75 mm/min higher than that of shrub-grass vegetation change then into mango fruit garden later,had better effects in improve the soil ameli-oration, raise water storage and inerease soil structure permeate.