摘要
本研究在彰化滨海工业区木麻黄(Casuarina equisetifolia)林下有客土处、无客土处及邻近非造林地进行土壤取样分析,以评估滨海环境通过客土及植栽来改善土壤理化性质的成效.将土壤分成0～10cm、11～20cm、21～30cm、31～40 cm分层取样,结果表明:3种土壤均以砂粒含量最高(80%以上);pH值以有客土的林地最低(pH 4.80～6.71),显示植物作用明显降低土壤pH值;有机碳含量以林地有客土的土壤最高(0.41%～2.15%),但仍属于极低(<2%)的等级;土壤全氮方面,同样以林地有客土最高(0.011%～0.075%),但不论林地、非造林地或有无客土之处,土壤全氮含量均低于0.1%;有效磷方面,林地含量明显高出非造林地,应与土壤有机质与pH值等的差异有关;阳离子交换量(CEC)方面,林地有客土的含量为2.06～3.92 cmol(+).kg-1,林地无客土的含量为1.96～3.14 cmol(+).kg-1,非造林地的含量为1.56～5.20 cmol(+).kg-1,三者具显著差异但均属极低(<5)的等级;pH值随土深而增加,有机碳含量、土壤全氮、有效磷以及交换性钙离子皆有随土深而下降的趋势;其余性质则无显著深度差异.综合而言,彰滨林地土壤性质受生物作用影响,在pH、有机碳、全氮、有效磷含量方面有显著改善,但离适合一般植物生长的土壤性质仍远.
To evaluate the effects of Casuarina equisetifolia plantation and guest soil on coastal soil properties, we sampled and analyzed three soils in Jhangbin Industrial Park of central Taiwan, one from C. equisetifolia plantation with guest soil, the second from the same plantation without guest soil and the third from a neighboring area without forest plantation. Soil samples were taken from depths of 0-10cm, 11 - 20cm, 21 - 30cm, 31 - 40 cm. Results have shown that the three soils all con-tained 〉 80% of sand. The C. equisetifolia plantation with guest soil had the lowest pH value （4. 80 6. 71） indicating that the planting of C. equisetifolia had lowered soil pH value. Organic carbon （0. 41% -2. 15% ） and total N （0. 011% -0. 075% ） in the C. equisetifolia plantation with guest soil were the highest among the three soils, although total N in all of them were lower than 0. 1%. Soil a-vailable P at C. equisetifolia stands was higher than that of the neighboring area without C. equisetifolia plantation, probably due to the disparity in soil organic matter and pH value between two soils. Cation exchange capacity was approximately 2. 06 -3.92cmol （＋）· kg^-1, 1.96 -3.14cmol （＋）· kg^-1 and 1.56 -5.20 cmol （ ＋ ）· kg^-1 for the C. equisetifolia plantation with and without guest soil and for the neighboring area without C. equisetifolia stands, respectively. This result indicated poor cat-ion exchange capacity for all the soils although the differences among them were significant. Soil pHwas higher in deeper soils while organic carbon, total N, and available P were lower in deeper soils,and other soil properties did not show significant differences among depths. The results of this study in-dicated that forest growth has improved soil pH, organic C, total N, and available P, but the soils arestill far from optimum condition for plant growth.
出处
《亚热带资源与环境学报》
2012年第2期7-16,共10页
Journal of Subtropical Resources and Environment
关键词
木麻黄
土壤性质
客土
彰滨工业区
Casuarina equisetifolia
soil properties
guest soil
Jhangbin Industrial Park
