摘要
新疆在过去的荒地开垦中,某些地区由于政策和技术措施不当,引起土壤次生盐渍化、沼泽化、沙化、贫瘠化,造成了资源的损失和浪费。水源、土壤盐硷化、土壤肥力是荒地开发中必须考虑的三大限制因素。在今后的荒地开发中必须遵循以下原则:①农区应以提高现有耕地的单位面积产量为主;②牧区开荒不仅要考虑引水方便,还应选择地形平坦、牧草已严重退化的地块,以种豆科牧草为主;③不同坡度的坡地采用不同的耕作措施和种植不同作物,减少水土流失。
In the wasted land reclaimtion in the past years in xinjang, soil salinity, marchabliztion, desertification and infertilization have occured in some regions,thus,causing great loss and wastage because of inproper policy and techniques, water resources, soil salinity and soil fertility are three important constraints which must be taken into account in explorating wasted lands.The following principles should be followed in the future wasted land exploration project: (1) priorityshould be given to improving per unit area crop yield of the existing farmland in agricultural area. (2) when wasted land reclaimition is carried out in animal husbandry area, considerations should be given to not only the convenience of water resources but also the selection of flat landforms. Legume forage species must be mainly planted in the lands in which forage grasses are seriousely deteriorated; (3) Different cultivation measures should be adopted and different plant shecies must also be planted in the sloping lands wish different slope degrees so as to deminish water and soil erosion.
出处
《干旱地区农业研究》
CSCD
北大核心
1989年第1期57-62,共6页
Agricultural Research in the Arid Areas
