绿洲灌区多熟种植现状潜力与开发对策——以张掖市甘州区为例

多熟种植是提高资源利用效率的有效途径之一,但严格受限于热量和水分资源。通过对绿洲灌区典型代表甘州区多熟种植现状的评价以及热量和水分复种潜力的测算,得出该区仍有22.35%的复种潜力可供挖掘。提出了绿洲灌区发展多熟种植的基本对策:以节水为突破口,稳定现存复种规模,挖掘内部潜力;组合节水型高产高效多元化多熟模式;循序提高水资源利用效率,适度提高复种程度;提高农业机械化水平,增加复种经济效益。

Current status potency and development countermeasure of multiple cropping in the oasis irrigation area

The multiple cropping is one of the most effective practices to enhance the resources utilization, however it is strictly limited by quantity of heat and water resources. In this paper,current status of the multiple cropping in a typical oasis irrigation area was evaluated, and the multiple cropping potencies of heat and water resources were measured. The results indicated that in this area the cropping index can be improved by 22. 35 % on the basis of the current index. The countermeasures for developing multiple cropping in oasis irrigation area have been drawn up as follows: basing on water-saving agriculture to keep multiple cropping scale and to optimize the agricultural structure,integrating water-saving multiple cropping patterns with higher yield and efficiency,improving water resources utilization efficiency in proper order and increasing the cropping index correspondingly,and developing agricultural mechanization so as to make more benefits of multiple cropping.