马莲河流域闲散地与梯田埂坎利用现状调查

Investigation of Use Condition on Freeland and Embankment of Terrace in Malian River Watershed Area

对马莲河流域项目区内的闲散地与梯田埂坎利用方式和利用率进行了抽样调查，其利用率分别为６８９％和１９８％，尚有大面积的闲散地和梯田埂坎有待于开发利用。闲散地的利用应先改良土壤耕作层的理化性状，因地制宜，垦复为农田、林地、果园、菜园及牧草地。梯田埂坎的开发利用，以地埂黄花、地埂经济树（杏、枣、花椒等）、地埂经济植物立体混交、地埂灌木（红柳、紫穗槐等）、地埂牧草（紫花苜蓿、红豆草、禾草）为主要利用方式，依据不同的立地条件，选择适宜的经济植物种类，尤其发展地埂经济植物立体混交模式。

Utilization methods and ratio have been investigated by sampling in the Malian river watershed project area, the utilization ratio of freeland and embankment of terrace, are 68 9% and 19.8% respectively. Much unutilized land should be exploited in the future. Physical and chemical quality of tillage floor should be improved at first for utilization of freeland. According to local conditions, the freeland cultivated into cropland, forestland, fruitland, vegetableland and grassland. The exploit of embankment can be achieved by planting Hemercoallis citrina , economical trees ( Prunus armeniaca、Ziziphus jujuba、Zanthoxylum bungeanum ect .), shrub (Tamarix austromngolica、Tamarix ramosiissima、Amorpha fruticosa ect. ), and grass ( Medicage sativa、Onobrychis ssp. ect. ). According to land conditions, the special of economical plant should be selected. The land utilization ratio and land production ratio can be improved remarkbly by developing space and mixture model of economical plant.