制备了一种用于荒漠化治理中节水造林的动态导水复合材料.该材料是由不同比例的高吸水性树脂与蒙脱土复合于纤维支撑体表面构成涂层.用SEM分析了涂层材料的显微结构,用热分析研究了材料的吸脱附水特性,用快速水分仪测定了不同土壤湿度条件下材料的导水参数.结果表明:蒙脱土颗粒能够拆解并分散于高吸水树脂的枝状体结构中;通过树脂对蒙脱土的支配作用所产生的蒙脱土颗粒的空间连续性来确定其导水速率,该速率随土壤湿度的降低而增加;使用该材料后云杉树苗成活率得以大幅度提高;涂层材料对土壤湿度的自调节作用为植物生长提供了合理的水分条件.
A kind of water - transferring composite used for water saving and planting in desertification controlling was prepared. It was composed of different proportions of polyacrylamide solutions and montmorillonite coated on fibre. The micro - appearance of the coated fibre and the microstructure of the coat were described by scanning electron microscope. The water desorption characteristics of the coat were detected by thermogravimetry. The water - transferring capabilities of the coated fibre in soil with various moisture were analysed by rapid moisture meter. The results show that montmorillonite grains disperse throughout the branches of polyacrylamide. Water transfer rate is determined by spatial continuity of the grains which is caused by dominant action of polyacrylamide on montmorillonite under different water potentials of the coat. The rate increases with soil moisture decreasing. The survival rate gets higher when the coat is applied to picea asperata mast. Self - adjustment of the composite coat to soil moisture provides appropriate water to plants.
参考文献
| [1] | 抗沙漠化协定中国执委会.China Country Paper to Combat Desertification[M].Beijng:China Forestry Publishing House,1996:18. |
| [2] | 赵瑾,张增志,张利梅,张际飞,张玉肖.原生粉煤灰涂层导水纤维的制备及其渗水特性试验研究[J].功能材料,2007(05):809-811. |
| [3] | Back W .Hydromythology and Ethnology in the New World[J].Water Resources Research,1981,17:257. |
| [4] | Schreiber H A;Frasier G W .Increasing Rangeland Forage Production by Water Harvesting[J].Soil Science Society of America Journal,1982,46:602. |
| [5] | Fink D H .Paraffin-Wax Water-Harvesting Soil Treatment Improved with Antistripping Agents[J].Soil Science,1984,138:46. |
| [6] | Fink D H;Ehrler W L .Runoff Farming for Growing Christmas Trees[J].Soil Science Society of America Journal,1983,47:983. |
| [7] | Ma T X;Pang Z C;LuX Z .Application of the Super Absorbent Polymers in Gansu[J].Gansu Agricultural Science and Technology,1997,12:31. |
| [8] | Wang J L .Application of Water Absorbent in Forest Plantation at the Sunny Hill Slope of Beijing (Ⅰ,Ⅱ,Ⅲ,Ⅳ)[J].Journal of Beijing Forestry University,1991,53(z1):143. |
| [9] | 尹国平,农韧钢,刘革宁.高吸水剂在我国林业上的应用研究进展[J].世界林业研究,2001(02):50-54. |
| [10] | Wang J L .Application of Water Absorbent in Forest Plantation at the Sunny Hill Slope of Beijing (Ⅰ,Ⅱ,Ⅲ,Ⅳ)[J].Journal of Beijing Forestry University,1991,13(z1):512. |
| [11] | Wallace G;Wallace A .Control of Soil Erosion by Polymeric Soil Conditionens[J].Soil Science,1986,141:363. |
| [12] | Tinus R W;McDonald S E .How to Grow Tree Seeding in Containers in Greenhouse[Technical Report RM60][R].Washinton,D C:USDA Forest Service General,1979. |
| [13] | Lal La J K;Hamrapurkar P D;Mukherjee S A .Estimation of the Saussurine Content of Root Powder and a Tablet Formulation Prepared from Saussurca Lappa[J].Journal of Planar Chromatography-Modern TLC,2004,11:36. |
| [14] | 张增志,刘铭,赵鑫,张利梅,张际飞.对土壤湿度具有自调节功能的导水涂层纤维的研究[J].材料科学与工程学报,2007(01):55-60. |
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