水分和养分供应对凹凸棒石复配苔藓结皮生长的影响

为了评价生物固沙材料在不同水分和养分供应条件下的应用效果，对沙漠苔藓结皮和含凹凸棒石固沙材料的叶绿素和生长进行了研究。结果表明：人工培养苔藓结皮与固沙材料的最佳配比为1∶1，由接种在沙面上的生物固沙材料的叶绿素a含量、强度和厚度决定。凹凸棒石显著提高了接种生物固沙材料的强度、叶绿素a含量和厚度。3种养分供应方式和3种模拟干旱区的间歇供水方式均能显著提高人工生物型结皮的厚度和强度。50%的养分处理是最佳的养分供应方式。接种生物固沙材料在隔天供水条件下具有较高的厚度和强度。较短的供水和养分供应间歇有利于沙漠生物结皮的生存和繁殖。

Effects of water and nutrient supply on growth of moss crust mixed with attapulgite

The chlorophyll-a and growth of biological sand-fixing materials prepared with desert moss crust and sand-fixing materials added by attapulgite were investigated in order to assess the application effects of biological sand-fixing materials under different water and nutrient supply. The results suggested that the optimal mixture ratio of 1∶1 for cultural moss crust and sand-fixing material was determinate by chlorophyll-a， strength and thickness of biological sand-fixing materials inoculated on the sand surface. Attapulgite clay significantly improved the stronger strength， more chlorophyll-a and thickness of inoculated biological sand-fixing materials. Three methods of nutrient supply and interval water supply based on precipitation in arid region both could significantly promoted the thickness and enhanced the strength， 50% nutrient treatment was considered as the optimal nutrient supply method. The inoculating biological sand-fixing materials performed higher thickness and stronger strength under 1 day interval water supply. More shorter interval water supply and nutrient providing were beneficial to the survival and propagation of desert biological crusts.