不同配置农田防护林对土壤物理性质的影响

Influence of Different Pattern Farmland Shelterbelts on Soil Physical Properties

在乌兰布和沙漠的东北缘选取了8种配置结构的农田防护林影响下的农田土壤作为实验样地,通过实测土壤的容重、孔隙度、水分以及温度等土壤物理性质,分析研究了8种防护林对农田土壤的影响.结果表明:4行配置的农田防护林1行榆树+2行旱柳+1行榆树和1行榆树+2行新疆杨+1行榆树对农田土壤的容重、总孔隙度以及水分含量都有较为明显的改善,对应的各指标数值别分为1.30 g/cm3和1.33 g/cm3、51.0%和49.7%、17.6%和32.5%;8行的4行小美旱杨+4行旱柳配置对农田土壤的改良作用不明显.

Farm with eight different pattern farmland shelterbelts in northeast Ulanbuh Desert was choosed as samples for study. The soil bulk density, soil porosity, soil volumetric moisture content and soil of eight different farm lands were measured and analyzed. The effect of eight different pattern farmland shelterbelts on the physical properties of soil were discussed. The results indicate that the farmland shelterbelt of four lines （1 line of Ulrnus pumila L. ＋ 2 lines of Salisc rnatsudana Koidz ＋ 1 line of Ulmus pumila L. and 1 line of Ulmus pumila L. ＋ 2 lines of P. alba var. pyramidalis ＋ 1 line of Ulmus pumila L. ） significantly improves the soil bulk density, soil porosity and soil moisture content. And the corresponding value of each indicator is 1.30 g/cmaand 1.33 g/cm^3,51.0% and 49.7%, 17.6% and 32.5% respectively. The farmland shelterbelt of eight lines （4 lines of P. popularis＋4 lines of Salix matsudana Koidz） has no obvious improving effect on the soil.